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[openeuler:OLK-6.6 3508/3508] htmldocs: ./include/drm/drm_fourcc.h:149: warning: Function parameter or member 'KABI_RESERVE(1' not described in 'drm_format_info'
by kernel test robot 12 Dec '25

12 Dec '25

tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: 5930fa3740c518a9f6ba688fd0c1873d6f3adbce commit: 2ca47cd62ebb51e337e558943c1d23e4a5f2fbcf [3508/3508] drm: drm_fourcc.h: Add kabi_reserve reproduce: (https://download.01.org/0day-ci/archive/20251211/202512112225.hE3xUWyq-lkp@…) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp(a)intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202512112225.hE3xUWyq-lkp@intel.com/ All warnings (new ones prefixed by >>): ./include/drm/drm_client.h:163: warning: Function parameter or member 'KABI_RESERVE(1' not described in 'drm_client_buffer' ./include/drm/drm_atomic.h:246: warning: Function parameter or member 'KABI_RESERVE(1' not described in 'drm_private_state_funcs' ./include/drm/drm_atomic.h:347: warning: Function parameter or member 'KABI_RESERVE(1' not described in 'drm_private_state' ./include/drm/drm_crtc.h:392: warning: Function parameter or member 'KABI_RESERVE(1' not described in 'drm_crtc_state' ./include/drm/drm_crtc.h:1185: warning: Function parameter or member 'KABI_RESERVE(1' not described in 'drm_crtc' >> ./include/drm/drm_fourcc.h:149: warning: Function parameter or member 'KABI_RESERVE(1' not described in 'drm_format_info' ./include/drm/drm_connector.h:328: warning: Function parameter or member 'KABI_RESERVE(1' not described in 'drm_hdmi_info' ./include/drm/drm_connector.h:531: warning: Enum value 'DRM_MODE_COLORIMETRY_COUNT' not described in enum 'drm_colorspace' ./include/drm/drm_connector.h:826: warning: Function parameter or member 'KABI_RESERVE(1' not described in 'drm_display_info' ./include/drm/drm_connector.h:888: warning: Function parameter or member 'KABI_RESERVE(1' not described in 'drm_tv_connector_state' ./include/drm/drm_connector.h:1350: warning: Function parameter or member 'KABI_RESERVE(1' not described in 'drm_connector_funcs' vim +149 ./include/drm/drm_fourcc.h 6a0f9ebfc5e753 Ville Syrjälä 2017-03-21 59 84770cc24f3a51 Laurent Pinchart 2016-10-18 60 /** 84770cc24f3a51 Laurent Pinchart 2016-10-18 61 * struct drm_format_info - information about a DRM format 84770cc24f3a51 Laurent Pinchart 2016-10-18 62 */ 84770cc24f3a51 Laurent Pinchart 2016-10-18 63 struct drm_format_info { 9c71a6686bfa4b Alexandru Gheorghe 2018-10-19 64 /** @format: 4CC format identifier (DRM_FORMAT_*) */ 84770cc24f3a51 Laurent Pinchart 2016-10-18 65 u32 format; 9c71a6686bfa4b Alexandru Gheorghe 2018-10-19 66 9c71a6686bfa4b Alexandru Gheorghe 2018-10-19 67 /** 9c71a6686bfa4b Alexandru Gheorghe 2018-10-19 68 * @depth: 9c71a6686bfa4b Alexandru Gheorghe 2018-10-19 69 * 9c71a6686bfa4b Alexandru Gheorghe 2018-10-19 70 * Color depth (number of bits per pixel excluding padding bits), 9c71a6686bfa4b Alexandru Gheorghe 2018-10-19 71 * valid for a subset of RGB formats only. This is a legacy field, do 9c71a6686bfa4b Alexandru Gheorghe 2018-10-19 72 * not use in new code and set to 0 for new formats. 9c71a6686bfa4b Alexandru Gheorghe 2018-10-19 73 */ 84770cc24f3a51 Laurent Pinchart 2016-10-18 74 u8 depth; 9c71a6686bfa4b Alexandru Gheorghe 2018-10-19 75 9c71a6686bfa4b Alexandru Gheorghe 2018-10-19 76 /** @num_planes: Number of color planes (1 to 3) */ 84770cc24f3a51 Laurent Pinchart 2016-10-18 77 u8 num_planes; 9c71a6686bfa4b Alexandru Gheorghe 2018-10-19 78 042bf753842ddb Alexandru Gheorghe 2018-11-01 79 union { 042bf753842ddb Alexandru Gheorghe 2018-11-01 80 /** 042bf753842ddb Alexandru Gheorghe 2018-11-01 81 * @cpp: 042bf753842ddb Alexandru Gheorghe 2018-11-01 82 * 042bf753842ddb Alexandru Gheorghe 2018-11-01 83 * Number of bytes per pixel (per plane), this is aliased with 042bf753842ddb Alexandru Gheorghe 2018-11-01 84 * @char_per_block. It is deprecated in favour of using the 042bf753842ddb Alexandru Gheorghe 2018-11-01 85 * triplet @char_per_block, @block_w, @block_h for better 042bf753842ddb Alexandru Gheorghe 2018-11-01 86 * describing the pixel format. 042bf753842ddb Alexandru Gheorghe 2018-11-01 87 */ 279cc2e9543eb3 Thomas Zimmermann 2021-07-30 88 u8 cpp[DRM_FORMAT_MAX_PLANES]; 9c71a6686bfa4b Alexandru Gheorghe 2018-10-19 89 042bf753842ddb Alexandru Gheorghe 2018-11-01 90 /** 042bf753842ddb Alexandru Gheorghe 2018-11-01 91 * @char_per_block: 042bf753842ddb Alexandru Gheorghe 2018-11-01 92 * 042bf753842ddb Alexandru Gheorghe 2018-11-01 93 * Number of bytes per block (per plane), where blocks are 042bf753842ddb Alexandru Gheorghe 2018-11-01 94 * defined as a rectangle of pixels which are stored next to 042bf753842ddb Alexandru Gheorghe 2018-11-01 95 * each other in a byte aligned memory region. Together with 042bf753842ddb Alexandru Gheorghe 2018-11-01 96 * @block_w and @block_h this is used to properly describe tiles 042bf753842ddb Alexandru Gheorghe 2018-11-01 97 * in tiled formats or to describe groups of pixels in packed 042bf753842ddb Alexandru Gheorghe 2018-11-01 98 * formats for which the memory needed for a single pixel is not 042bf753842ddb Alexandru Gheorghe 2018-11-01 99 * byte aligned. 042bf753842ddb Alexandru Gheorghe 2018-11-01 100 * 042bf753842ddb Alexandru Gheorghe 2018-11-01 101 * @cpp has been kept for historical reasons because there are 042bf753842ddb Alexandru Gheorghe 2018-11-01 102 * a lot of places in drivers where it's used. In drm core for 042bf753842ddb Alexandru Gheorghe 2018-11-01 103 * generic code paths the preferred way is to use 042bf753842ddb Alexandru Gheorghe 2018-11-01 104 * @char_per_block, drm_format_info_block_width() and 042bf753842ddb Alexandru Gheorghe 2018-11-01 105 * drm_format_info_block_height() which allows handling both 042bf753842ddb Alexandru Gheorghe 2018-11-01 106 * block and non-block formats in the same way. 042bf753842ddb Alexandru Gheorghe 2018-11-01 107 * 042bf753842ddb Alexandru Gheorghe 2018-11-01 108 * For formats that are intended to be used only with non-linear 042bf753842ddb Alexandru Gheorghe 2018-11-01 109 * modifiers both @cpp and @char_per_block must be 0 in the 042bf753842ddb Alexandru Gheorghe 2018-11-01 110 * generic format table. Drivers could supply accurate 042bf753842ddb Alexandru Gheorghe 2018-11-01 111 * information from their drm_mode_config.get_format_info hook 042bf753842ddb Alexandru Gheorghe 2018-11-01 112 * if they want the core to be validating the pitch. 042bf753842ddb Alexandru Gheorghe 2018-11-01 113 */ 279cc2e9543eb3 Thomas Zimmermann 2021-07-30 114 u8 char_per_block[DRM_FORMAT_MAX_PLANES]; 042bf753842ddb Alexandru Gheorghe 2018-11-01 115 }; 042bf753842ddb Alexandru Gheorghe 2018-11-01 116 042bf753842ddb Alexandru Gheorghe 2018-11-01 117 /** 042bf753842ddb Alexandru Gheorghe 2018-11-01 118 * @block_w: 042bf753842ddb Alexandru Gheorghe 2018-11-01 119 * 042bf753842ddb Alexandru Gheorghe 2018-11-01 120 * Block width in pixels, this is intended to be accessed through 042bf753842ddb Alexandru Gheorghe 2018-11-01 121 * drm_format_info_block_width() 042bf753842ddb Alexandru Gheorghe 2018-11-01 122 */ 279cc2e9543eb3 Thomas Zimmermann 2021-07-30 123 u8 block_w[DRM_FORMAT_MAX_PLANES]; 042bf753842ddb Alexandru Gheorghe 2018-11-01 124 042bf753842ddb Alexandru Gheorghe 2018-11-01 125 /** 042bf753842ddb Alexandru Gheorghe 2018-11-01 126 * @block_h: 042bf753842ddb Alexandru Gheorghe 2018-11-01 127 * 042bf753842ddb Alexandru Gheorghe 2018-11-01 128 * Block height in pixels, this is intended to be accessed through 042bf753842ddb Alexandru Gheorghe 2018-11-01 129 * drm_format_info_block_height() 042bf753842ddb Alexandru Gheorghe 2018-11-01 130 */ 279cc2e9543eb3 Thomas Zimmermann 2021-07-30 131 u8 block_h[DRM_FORMAT_MAX_PLANES]; 042bf753842ddb Alexandru Gheorghe 2018-11-01 132 9c71a6686bfa4b Alexandru Gheorghe 2018-10-19 133 /** @hsub: Horizontal chroma subsampling factor */ 84770cc24f3a51 Laurent Pinchart 2016-10-18 134 u8 hsub; 9c71a6686bfa4b Alexandru Gheorghe 2018-10-19 135 /** @vsub: Vertical chroma subsampling factor */ 84770cc24f3a51 Laurent Pinchart 2016-10-18 136 u8 vsub; 9c71a6686bfa4b Alexandru Gheorghe 2018-10-19 137 9c71a6686bfa4b Alexandru Gheorghe 2018-10-19 138 /** @has_alpha: Does the format embeds an alpha component? */ 4cc4e1b40f3ff5 Maxime Ripard 2017-12-22 139 bool has_alpha; 9c71a6686bfa4b Alexandru Gheorghe 2018-10-19 140 9c71a6686bfa4b Alexandru Gheorghe 2018-10-19 141 /** @is_yuv: Is it a YUV format? */ ce2d54619a1078 Ayan Kumar Halder 2018-07-17 142 bool is_yuv; dc1dc76bd9a48c Geert Uytterhoeven 2022-07-08 143 dc1dc76bd9a48c Geert Uytterhoeven 2022-07-08 144 /** @is_color_indexed: Is it a color-indexed format? */ dc1dc76bd9a48c Geert Uytterhoeven 2022-07-08 145 bool is_color_indexed; 2ca47cd62ebb51 Lin Yujun 2024-02-04 146 2ca47cd62ebb51 Lin Yujun 2024-02-04 147 KABI_RESERVE(1) 2ca47cd62ebb51 Lin Yujun 2024-02-04 148 KABI_RESERVE(2) 84770cc24f3a51 Laurent Pinchart 2016-10-18 @149 }; 84770cc24f3a51 Laurent Pinchart 2016-10-18 150 :::::: The code at line 149 was first introduced by commit :::::: 84770cc24f3a51c05055665feeac1dcf22119d69 drm: Centralize format information :::::: TO: Laurent Pinchart <laurent.pinchart(a)ideasonboard.com> :::::: CC: Archit Taneja <architt(a)codeaurora.org> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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[openeuler:OLK-6.6 3534/3534] htmldocs: Documentation/translations/zh_TW/dev-tools/index.rst:21: WARNING: toctree contains reference to nonexisting document 'translations/zh_TW/dev-tools/sparse' [toc.not_readable]
by kernel test robot 12 Dec '25

12 Dec '25

tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: 5930fa3740c518a9f6ba688fd0c1873d6f3adbce commit: b5ddf23d827cd42071866cc3bf265044c87e4ca9 [3534/3534] docs: kernel_feat.py: fix build error for missing files reproduce: (https://download.01.org/0day-ci/archive/20251211/202512112120.v8ybUBJh-lkp@…) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp(a)intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202512112120.v8ybUBJh-lkp@intel.com/ All warnings (new ones prefixed by >>): KASLR for Freescale BookE32 ------------------------- [docutils] WARNING: kernel-doc './scripts/kernel-doc -rst -enable-lineno -sphinx-version 8.2.3 ./include/linux/fprobe.h' failed with return code 1 WARNING: kernel-doc './scripts/kernel-doc -rst -enable-lineno -sphinx-version 8.2.3 -internal ./include/linux/mutex.h' failed with return code 2 >> Documentation/translations/zh_TW/dev-tools/index.rst:21: WARNING: toctree contains reference to nonexisting document 'translations/zh_TW/dev-tools/sparse' [toc.not_readable] vim +21 Documentation/translations/zh_TW/dev-tools/index.rst a149733d00db3a Min-Hua Chen 2024-03-20 18 a149733d00db3a Min-Hua Chen 2024-03-20 19 目錄 a149733d00db3a Min-Hua Chen 2024-03-20 20 a149733d00db3a Min-Hua Chen 2024-03-20 @21 .. toctree:: :::::: The code at line 21 was first introduced by commit :::::: a149733d00db3a31a18e7818c361617daecdfa1f docs: sparse: add sparse.rst to toctree :::::: TO: Min-Hua Chen <minhuadotchen(a)gmail.com> :::::: CC: Ma Wupeng <mawupeng1(a)huawei.com> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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[openeuler:OLK-6.6 3534/3534] kernel/locking/mutex.c:623:6: warning: variable 'ifs_clock' is used uninitialized whenever 'if' condition is true
by kernel test robot 12 Dec '25

12 Dec '25

Hi Pu, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: 5930fa3740c518a9f6ba688fd0c1873d6f3adbce commit: a1ad9b2ed459a3e3a4a2de50e03f53036fc7ec96 [3534/3534] interference: Add mutex interference track support config: arm64-allnoconfig-bpf (https://download.01.org/0day-ci/archive/20251211/202512112149.942egSDc-lkp@…) compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 4125e73cdc6188cca4c1c72b72e2b2d85c157483) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251211/202512112149.942egSDc-lkp@…) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp(a)intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202512112149.942egSDc-lkp@intel.com/ All warnings (new ones prefixed by >>): In file included from <built-in>:3: In file included from ././include/linux/compiler_types.h:150: ./include/linux/compiler-clang.h:33:9: warning: '__SANITIZE_ADDRESS__' macro redefined [-Wmacro-redefined] 33 | #define __SANITIZE_ADDRESS__ | ^ <built-in>:367:9: note: previous definition is here 367 | #define __SANITIZE_ADDRESS__ 1 | ^ >> kernel/locking/mutex.c:623:6: warning: variable 'ifs_clock' is used uninitialized whenever 'if' condition is true [-Wsometimes-uninitialized] 623 | if (__mutex_trylock(lock)) { | ^~~~~~~~~~~~~~~~~~~~~ kernel/locking/mutex.c:725:24: note: uninitialized use occurs here 725 | cgroup_ifs_leave_lock(ifs_clock, IFS_MUTEX); | ^~~~~~~~~ kernel/locking/mutex.c:623:2: note: remove the 'if' if its condition is always false 623 | if (__mutex_trylock(lock)) { | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ 624 | if (ww_ctx) | ~~~~~~~~~~~ 625 | __ww_mutex_check_waiters(lock, ww_ctx); | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 626 | 627 | goto skip_wait; | ~~~~~~~~~~~~~~~ 628 | } | ~ kernel/locking/mutex.c:576:15: note: initialize the variable 'ifs_clock' to silence this warning 576 | u64 ifs_clock; | ^ | = 0 2 warnings generated. vim +623 kernel/locking/mutex.c 040a0a37100563 kernel/mutex.c Maarten Lankhorst 2013-06-24 565 040a0a37100563 kernel/mutex.c Maarten Lankhorst 2013-06-24 566 /* 040a0a37100563 kernel/mutex.c Maarten Lankhorst 2013-06-24 567 * Lock a mutex (possibly interruptible), slowpath: 040a0a37100563 kernel/mutex.c Maarten Lankhorst 2013-06-24 568 */ 040a0a37100563 kernel/mutex.c Maarten Lankhorst 2013-06-24 569 static __always_inline int __sched 2f064a59a11ff9 kernel/locking/mutex.c Peter Zijlstra 2021-06-11 570 __mutex_lock_common(struct mutex *lock, unsigned int state, unsigned int subclass, 040a0a37100563 kernel/mutex.c Maarten Lankhorst 2013-06-24 571 struct lockdep_map *nest_lock, unsigned long ip, b0267507dfd018 kernel/mutex.c Tetsuo Handa 2013-10-17 572 struct ww_acquire_ctx *ww_ctx, const bool use_ww_ctx) 6053ee3b32e343 kernel/mutex.c Ingo Molnar 2006-01-09 573 { 6053ee3b32e343 kernel/mutex.c Ingo Molnar 2006-01-09 574 struct mutex_waiter waiter; a40ca56577f628 kernel/locking/mutex.c Waiman Long 2016-08-26 575 struct ww_mutex *ww; a1ad9b2ed459a3 kernel/locking/mutex.c Pu Lehui 2025-07-16 576 u64 ifs_clock; 040a0a37100563 kernel/mutex.c Maarten Lankhorst 2013-06-24 577 int ret; 6053ee3b32e343 kernel/mutex.c Ingo Molnar 2006-01-09 578 5de2055d31ea88 kernel/locking/mutex.c Waiman Long 2021-03-16 579 if (!use_ww_ctx) 5de2055d31ea88 kernel/locking/mutex.c Waiman Long 2021-03-16 580 ww_ctx = NULL; 5de2055d31ea88 kernel/locking/mutex.c Waiman Long 2021-03-16 581 427b18207a87f6 kernel/locking/mutex.c Peter Zijlstra 2016-12-23 582 might_sleep(); ea9e0fb8fe1bdf kernel/locking/mutex.c Nicolai Hähnle 2016-12-21 583 e6b4457b05f36b kernel/locking/mutex.c Peter Zijlstra 2021-06-30 584 MUTEX_WARN_ON(lock->magic != lock); 6c11c6e3d5e9e5 kernel/locking/mutex.c Sebastian Andrzej Siewior 2019-07-03 585 a40ca56577f628 kernel/locking/mutex.c Waiman Long 2016-08-26 586 ww = container_of(lock, struct ww_mutex, base); 5de2055d31ea88 kernel/locking/mutex.c Waiman Long 2021-03-16 587 if (ww_ctx) { 0422e83d84ae24 kernel/locking/mutex.c Chris Wilson 2016-05-26 588 if (unlikely(ww_ctx == READ_ONCE(ww->ctx))) 0422e83d84ae24 kernel/locking/mutex.c Chris Wilson 2016-05-26 589 return -EALREADY; 08295b3b5beec9 kernel/locking/mutex.c Thomas Hellstrom 2018-06-15 590 08295b3b5beec9 kernel/locking/mutex.c Thomas Hellstrom 2018-06-15 591 /* 08295b3b5beec9 kernel/locking/mutex.c Thomas Hellstrom 2018-06-15 592 * Reset the wounded flag after a kill. No other process can 08295b3b5beec9 kernel/locking/mutex.c Thomas Hellstrom 2018-06-15 593 * race and wound us here since they can't have a valid owner 08295b3b5beec9 kernel/locking/mutex.c Thomas Hellstrom 2018-06-15 594 * pointer if we don't have any locks held. 08295b3b5beec9 kernel/locking/mutex.c Thomas Hellstrom 2018-06-15 595 */ 08295b3b5beec9 kernel/locking/mutex.c Thomas Hellstrom 2018-06-15 596 if (ww_ctx->acquired == 0) 08295b3b5beec9 kernel/locking/mutex.c Thomas Hellstrom 2018-06-15 597 ww_ctx->wounded = 0; cf702eddcd03dc kernel/locking/mutex.c Peter Zijlstra 2021-08-15 598 cf702eddcd03dc kernel/locking/mutex.c Peter Zijlstra 2021-08-15 599 #ifdef CONFIG_DEBUG_LOCK_ALLOC cf702eddcd03dc kernel/locking/mutex.c Peter Zijlstra 2021-08-15 600 nest_lock = &ww_ctx->dep_map; cf702eddcd03dc kernel/locking/mutex.c Peter Zijlstra 2021-08-15 601 #endif 0422e83d84ae24 kernel/locking/mutex.c Chris Wilson 2016-05-26 602 } 0422e83d84ae24 kernel/locking/mutex.c Chris Wilson 2016-05-26 603 41719b03091911 kernel/mutex.c Peter Zijlstra 2009-01-14 604 preempt_disable(); e4c70a6629f9c7 kernel/mutex.c Peter Zijlstra 2011-05-24 605 mutex_acquire_nest(&lock->dep_map, subclass, 0, nest_lock, ip); c02260277e4720 kernel/mutex.c Frederic Weisbecker 2009-12-02 606 dc1f7893a70fe4 kernel/locking/mutex.c Peter Zijlstra 2022-03-30 607 trace_contention_begin(lock, LCB_F_MUTEX | LCB_F_SPIN); e274795ea7b7ca kernel/locking/mutex.c Peter Zijlstra 2017-01-11 608 if (__mutex_trylock(lock) || 5de2055d31ea88 kernel/locking/mutex.c Waiman Long 2021-03-16 609 mutex_optimistic_spin(lock, ww_ctx, NULL)) { 76916515d9d84e kernel/locking/mutex.c Davidlohr Bueso 2014-07-30 610 /* got the lock, yay! */ 3ca0ff571b092e kernel/locking/mutex.c Peter Zijlstra 2016-08-23 611 lock_acquired(&lock->dep_map, ip); 5de2055d31ea88 kernel/locking/mutex.c Waiman Long 2021-03-16 612 if (ww_ctx) 3ca0ff571b092e kernel/locking/mutex.c Peter Zijlstra 2016-08-23 613 ww_mutex_set_context_fastpath(ww, ww_ctx); dc1f7893a70fe4 kernel/locking/mutex.c Peter Zijlstra 2022-03-30 614 trace_contention_end(lock, 0); ac6e60ee405aa3 kernel/mutex.c Chris Mason 2009-01-14 615 preempt_enable(); ac6e60ee405aa3 kernel/mutex.c Chris Mason 2009-01-14 616 return 0; ac6e60ee405aa3 kernel/mutex.c Chris Mason 2009-01-14 617 } ac6e60ee405aa3 kernel/mutex.c Chris Mason 2009-01-14 618 ebf4c55c1ddbab kernel/locking/mutex.c Thomas Gleixner 2021-08-15 619 raw_spin_lock(&lock->wait_lock); 1e820c9608eace kernel/locking/mutex.c Jason Low 2014-06-11 620 /* 3ca0ff571b092e kernel/locking/mutex.c Peter Zijlstra 2016-08-23 621 * After waiting to acquire the wait_lock, try again. 1e820c9608eace kernel/locking/mutex.c Jason Low 2014-06-11 622 */ 659cf9f5824a12 kernel/locking/mutex.c Nicolai Hähnle 2016-12-21 @623 if (__mutex_trylock(lock)) { 5de2055d31ea88 kernel/locking/mutex.c Waiman Long 2021-03-16 624 if (ww_ctx) 55f036ca7e74b8 kernel/locking/mutex.c Peter Ziljstra 2018-06-15 625 __ww_mutex_check_waiters(lock, ww_ctx); 659cf9f5824a12 kernel/locking/mutex.c Nicolai Hähnle 2016-12-21 626 ec83f425dbca47 kernel/mutex.c Davidlohr Bueso 2013-06-28 627 goto skip_wait; 659cf9f5824a12 kernel/locking/mutex.c Nicolai Hähnle 2016-12-21 628 } ec83f425dbca47 kernel/mutex.c Davidlohr Bueso 2013-06-28 629 9a11b49a805665 kernel/mutex.c Ingo Molnar 2006-07-03 630 debug_mutex_lock_common(lock, &waiter); c0afb0ffc06e6b kernel/locking/mutex.c Peter Zijlstra 2021-08-15 631 waiter.task = current; b857174e68e26f kernel/locking/mutex.c Sebastian Andrzej Siewior 2021-08-19 632 if (use_ww_ctx) c0afb0ffc06e6b kernel/locking/mutex.c Peter Zijlstra 2021-08-15 633 waiter.ww_ctx = ww_ctx; 6053ee3b32e343 kernel/mutex.c Ingo Molnar 2006-01-09 634 6baa5c60a97d7f kernel/locking/mutex.c Nicolai Hähnle 2016-12-21 635 lock_contended(&lock->dep_map, ip); 6053ee3b32e343 kernel/mutex.c Ingo Molnar 2006-01-09 636 6baa5c60a97d7f kernel/locking/mutex.c Nicolai Hähnle 2016-12-21 637 if (!use_ww_ctx) { 6053ee3b32e343 kernel/mutex.c Ingo Molnar 2006-01-09 638 /* add waiting tasks to the end of the waitqueue (FIFO): */ 08295b3b5beec9 kernel/locking/mutex.c Thomas Hellstrom 2018-06-15 639 __mutex_add_waiter(lock, &waiter, &lock->wait_list); 6baa5c60a97d7f kernel/locking/mutex.c Nicolai Hähnle 2016-12-21 640 } else { 55f036ca7e74b8 kernel/locking/mutex.c Peter Ziljstra 2018-06-15 641 /* 55f036ca7e74b8 kernel/locking/mutex.c Peter Ziljstra 2018-06-15 642 * Add in stamp order, waking up waiters that must kill 55f036ca7e74b8 kernel/locking/mutex.c Peter Ziljstra 2018-06-15 643 * themselves. 55f036ca7e74b8 kernel/locking/mutex.c Peter Ziljstra 2018-06-15 644 */ 6baa5c60a97d7f kernel/locking/mutex.c Nicolai Hähnle 2016-12-21 645 ret = __ww_mutex_add_waiter(&waiter, lock, ww_ctx); 6baa5c60a97d7f kernel/locking/mutex.c Nicolai Hähnle 2016-12-21 646 if (ret) 55f036ca7e74b8 kernel/locking/mutex.c Peter Ziljstra 2018-06-15 647 goto err_early_kill; 6baa5c60a97d7f kernel/locking/mutex.c Nicolai Hähnle 2016-12-21 648 } 6baa5c60a97d7f kernel/locking/mutex.c Nicolai Hähnle 2016-12-21 649 642fa448ae6b3a kernel/locking/mutex.c Davidlohr Bueso 2017-01-03 650 set_current_state(state); dc1f7893a70fe4 kernel/locking/mutex.c Peter Zijlstra 2022-03-30 651 trace_contention_begin(lock, LCB_F_MUTEX); a1ad9b2ed459a3 kernel/locking/mutex.c Pu Lehui 2025-07-16 652 cgroup_ifs_enter_lock(&ifs_clock); 6053ee3b32e343 kernel/mutex.c Ingo Molnar 2006-01-09 653 for (;;) { 048661a1f963e9 kernel/locking/mutex.c Peter Zijlstra 2021-06-30 654 bool first; 048661a1f963e9 kernel/locking/mutex.c Peter Zijlstra 2021-06-30 655 5bbd7e64437833 kernel/locking/mutex.c Peter Zijlstra 2016-09-02 656 /* 5bbd7e64437833 kernel/locking/mutex.c Peter Zijlstra 2016-09-02 657 * Once we hold wait_lock, we're serialized against 5bbd7e64437833 kernel/locking/mutex.c Peter Zijlstra 2016-09-02 658 * mutex_unlock() handing the lock off to us, do a trylock 5bbd7e64437833 kernel/locking/mutex.c Peter Zijlstra 2016-09-02 659 * before testing the error conditions to make sure we pick up 5bbd7e64437833 kernel/locking/mutex.c Peter Zijlstra 2016-09-02 660 * the handoff. 5bbd7e64437833 kernel/locking/mutex.c Peter Zijlstra 2016-09-02 661 */ e274795ea7b7ca kernel/locking/mutex.c Peter Zijlstra 2017-01-11 662 if (__mutex_trylock(lock)) 5bbd7e64437833 kernel/locking/mutex.c Peter Zijlstra 2016-09-02 663 goto acquired; 6053ee3b32e343 kernel/mutex.c Ingo Molnar 2006-01-09 664 6053ee3b32e343 kernel/mutex.c Ingo Molnar 2006-01-09 665 /* 55f036ca7e74b8 kernel/locking/mutex.c Peter Ziljstra 2018-06-15 666 * Check for signals and kill conditions while holding 5bbd7e64437833 kernel/locking/mutex.c Peter Zijlstra 2016-09-02 667 * wait_lock. This ensures the lock cancellation is ordered 5bbd7e64437833 kernel/locking/mutex.c Peter Zijlstra 2016-09-02 668 * against mutex_unlock() and wake-ups do not go missing. 6053ee3b32e343 kernel/mutex.c Ingo Molnar 2006-01-09 669 */ 3bb5f4ac55dd91 kernel/locking/mutex.c Davidlohr Bueso 2019-01-03 670 if (signal_pending_state(state, current)) { 040a0a37100563 kernel/mutex.c Maarten Lankhorst 2013-06-24 671 ret = -EINTR; 040a0a37100563 kernel/mutex.c Maarten Lankhorst 2013-06-24 672 goto err; 040a0a37100563 kernel/mutex.c Maarten Lankhorst 2013-06-24 673 } 6053ee3b32e343 kernel/mutex.c Ingo Molnar 2006-01-09 674 5de2055d31ea88 kernel/locking/mutex.c Waiman Long 2021-03-16 675 if (ww_ctx) { 55f036ca7e74b8 kernel/locking/mutex.c Peter Ziljstra 2018-06-15 676 ret = __ww_mutex_check_kill(lock, &waiter, ww_ctx); 040a0a37100563 kernel/mutex.c Maarten Lankhorst 2013-06-24 677 if (ret) 040a0a37100563 kernel/mutex.c Maarten Lankhorst 2013-06-24 678 goto err; 6053ee3b32e343 kernel/mutex.c Ingo Molnar 2006-01-09 679 } 040a0a37100563 kernel/mutex.c Maarten Lankhorst 2013-06-24 680 ebf4c55c1ddbab kernel/locking/mutex.c Thomas Gleixner 2021-08-15 681 raw_spin_unlock(&lock->wait_lock); bd2f55361f1834 kernel/mutex.c Thomas Gleixner 2011-03-21 682 schedule_preempt_disabled(); 9d659ae14b545c kernel/locking/mutex.c Peter Zijlstra 2016-08-23 683 6baa5c60a97d7f kernel/locking/mutex.c Nicolai Hähnle 2016-12-21 684 first = __mutex_waiter_is_first(lock, &waiter); 5bbd7e64437833 kernel/locking/mutex.c Peter Zijlstra 2016-09-02 685 642fa448ae6b3a kernel/locking/mutex.c Davidlohr Bueso 2017-01-03 686 set_current_state(state); 5bbd7e64437833 kernel/locking/mutex.c Peter Zijlstra 2016-09-02 687 /* 5bbd7e64437833 kernel/locking/mutex.c Peter Zijlstra 2016-09-02 688 * Here we order against unlock; we must either see it change 5bbd7e64437833 kernel/locking/mutex.c Peter Zijlstra 2016-09-02 689 * state back to RUNNING and fall through the next schedule(), 5bbd7e64437833 kernel/locking/mutex.c Peter Zijlstra 2016-09-02 690 * or we must see its unlock and acquire. 5bbd7e64437833 kernel/locking/mutex.c Peter Zijlstra 2016-09-02 691 */ dc1f7893a70fe4 kernel/locking/mutex.c Peter Zijlstra 2022-03-30 692 if (__mutex_trylock_or_handoff(lock, first)) dc1f7893a70fe4 kernel/locking/mutex.c Peter Zijlstra 2022-03-30 693 break; dc1f7893a70fe4 kernel/locking/mutex.c Peter Zijlstra 2022-03-30 694 dc1f7893a70fe4 kernel/locking/mutex.c Peter Zijlstra 2022-03-30 695 if (first) { dc1f7893a70fe4 kernel/locking/mutex.c Peter Zijlstra 2022-03-30 696 trace_contention_begin(lock, LCB_F_MUTEX | LCB_F_SPIN); dc1f7893a70fe4 kernel/locking/mutex.c Peter Zijlstra 2022-03-30 697 if (mutex_optimistic_spin(lock, ww_ctx, &waiter)) 5bbd7e64437833 kernel/locking/mutex.c Peter Zijlstra 2016-09-02 698 break; dc1f7893a70fe4 kernel/locking/mutex.c Peter Zijlstra 2022-03-30 699 trace_contention_begin(lock, LCB_F_MUTEX); dc1f7893a70fe4 kernel/locking/mutex.c Peter Zijlstra 2022-03-30 700 } 5bbd7e64437833 kernel/locking/mutex.c Peter Zijlstra 2016-09-02 701 ebf4c55c1ddbab kernel/locking/mutex.c Thomas Gleixner 2021-08-15 702 raw_spin_lock(&lock->wait_lock); 6053ee3b32e343 kernel/mutex.c Ingo Molnar 2006-01-09 703 } ebf4c55c1ddbab kernel/locking/mutex.c Thomas Gleixner 2021-08-15 704 raw_spin_lock(&lock->wait_lock); 5bbd7e64437833 kernel/locking/mutex.c Peter Zijlstra 2016-09-02 705 acquired: 642fa448ae6b3a kernel/locking/mutex.c Davidlohr Bueso 2017-01-03 706 __set_current_state(TASK_RUNNING); 51587bcf31d070 kernel/locking/mutex.c Davidlohr Bueso 2015-01-19 707 5de2055d31ea88 kernel/locking/mutex.c Waiman Long 2021-03-16 708 if (ww_ctx) { 08295b3b5beec9 kernel/locking/mutex.c Thomas Hellstrom 2018-06-15 709 /* 08295b3b5beec9 kernel/locking/mutex.c Thomas Hellstrom 2018-06-15 710 * Wound-Wait; we stole the lock (!first_waiter), check the 08295b3b5beec9 kernel/locking/mutex.c Thomas Hellstrom 2018-06-15 711 * waiters as anyone might want to wound us. 08295b3b5beec9 kernel/locking/mutex.c Thomas Hellstrom 2018-06-15 712 */ 08295b3b5beec9 kernel/locking/mutex.c Thomas Hellstrom 2018-06-15 713 if (!ww_ctx->is_wait_die && 08295b3b5beec9 kernel/locking/mutex.c Thomas Hellstrom 2018-06-15 714 !__mutex_waiter_is_first(lock, &waiter)) 08295b3b5beec9 kernel/locking/mutex.c Thomas Hellstrom 2018-06-15 715 __ww_mutex_check_waiters(lock, ww_ctx); 08295b3b5beec9 kernel/locking/mutex.c Thomas Hellstrom 2018-06-15 716 } 08295b3b5beec9 kernel/locking/mutex.c Thomas Hellstrom 2018-06-15 717 3a010c493271f0 kernel/locking/mutex.c Zqiang 2021-05-17 718 __mutex_remove_waiter(lock, &waiter); 3ca0ff571b092e kernel/locking/mutex.c Peter Zijlstra 2016-08-23 719 ec83f425dbca47 kernel/mutex.c Davidlohr Bueso 2013-06-28 720 debug_mutex_free_waiter(&waiter); 6053ee3b32e343 kernel/mutex.c Ingo Molnar 2006-01-09 721 ec83f425dbca47 kernel/mutex.c Davidlohr Bueso 2013-06-28 722 skip_wait: ec83f425dbca47 kernel/mutex.c Davidlohr Bueso 2013-06-28 723 /* got the lock - cleanup and rejoice! */ c7e78cff6b7518 kernel/mutex.c Peter Zijlstra 2008-10-16 724 lock_acquired(&lock->dep_map, ip); a1ad9b2ed459a3 kernel/locking/mutex.c Pu Lehui 2025-07-16 725 cgroup_ifs_leave_lock(ifs_clock, IFS_MUTEX); ee042be16cb455 kernel/locking/mutex.c Namhyung Kim 2022-03-22 726 trace_contention_end(lock, 0); 6053ee3b32e343 kernel/mutex.c Ingo Molnar 2006-01-09 727 5de2055d31ea88 kernel/locking/mutex.c Waiman Long 2021-03-16 728 if (ww_ctx) 55f036ca7e74b8 kernel/locking/mutex.c Peter Ziljstra 2018-06-15 729 ww_mutex_lock_acquired(ww, ww_ctx); 040a0a37100563 kernel/mutex.c Maarten Lankhorst 2013-06-24 730 ebf4c55c1ddbab kernel/locking/mutex.c Thomas Gleixner 2021-08-15 731 raw_spin_unlock(&lock->wait_lock); 41719b03091911 kernel/mutex.c Peter Zijlstra 2009-01-14 732 preempt_enable(); 6053ee3b32e343 kernel/mutex.c Ingo Molnar 2006-01-09 733 return 0; 040a0a37100563 kernel/mutex.c Maarten Lankhorst 2013-06-24 734 040a0a37100563 kernel/mutex.c Maarten Lankhorst 2013-06-24 735 err: 642fa448ae6b3a kernel/locking/mutex.c Davidlohr Bueso 2017-01-03 736 __set_current_state(TASK_RUNNING); 3a010c493271f0 kernel/locking/mutex.c Zqiang 2021-05-17 737 __mutex_remove_waiter(lock, &waiter); 55f036ca7e74b8 kernel/locking/mutex.c Peter Ziljstra 2018-06-15 738 err_early_kill: a1ad9b2ed459a3 kernel/locking/mutex.c Pu Lehui 2025-07-16 739 cgroup_ifs_leave_lock(ifs_clock, IFS_MUTEX); dc1f7893a70fe4 kernel/locking/mutex.c Peter Zijlstra 2022-03-30 740 trace_contention_end(lock, ret); ebf4c55c1ddbab kernel/locking/mutex.c Thomas Gleixner 2021-08-15 741 raw_spin_unlock(&lock->wait_lock); 040a0a37100563 kernel/mutex.c Maarten Lankhorst 2013-06-24 742 debug_mutex_free_waiter(&waiter); 5facae4f3549b5 kernel/locking/mutex.c Qian Cai 2019-09-19 743 mutex_release(&lock->dep_map, ip); 040a0a37100563 kernel/mutex.c Maarten Lankhorst 2013-06-24 744 preempt_enable(); 040a0a37100563 kernel/mutex.c Maarten Lankhorst 2013-06-24 745 return ret; 6053ee3b32e343 kernel/mutex.c Ingo Molnar 2006-01-09 746 } 6053ee3b32e343 kernel/mutex.c Ingo Molnar 2006-01-09 747 :::::: The code at line 623 was first introduced by commit :::::: 659cf9f5824a12e6b50785e4e9cf1adf8a3adbd0 locking/ww_mutex: Optimize ww-mutexes by waking at most one waiter for backoff when acquiring the lock :::::: TO: Nicolai Hähnle <Nicolai.Haehnle(a)amd.com> :::::: CC: Ingo Molnar <mingo(a)kernel.org> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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[openeuler:OLK-6.6 3536/3536] net/ipv4/tcp_comp.c:740:6: warning: no previous prototype for function 'comp_stream_read'
by kernel test robot 12 Dec '25

12 Dec '25

Hi Lu, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: 5930fa3740c518a9f6ba688fd0c1873d6f3adbce commit: c31dcf6c5ab41f07da38d3f270987807735ec93e [3536/3536] tcp_comp: implement tcp compression config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20251212/202512120305.ngE1OnFo-lkp@…) compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251212/202512120305.ngE1OnFo-lkp@…) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp(a)intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202512120305.ngE1OnFo-lkp@intel.com/ All warnings (new ones prefixed by >>): In file included from net/ipv4/tcp_comp.c:8: In file included from include/linux/skmsg.h:7: In file included from include/linux/bpf.h:21: In file included from include/linux/kallsyms.h:13: In file included from include/linux/mm.h:2181: include/linux/vmstat.h:508:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 508 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 509 | item]; | ~~~~ include/linux/vmstat.h:515:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 515 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 516 | NR_VM_NUMA_EVENT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~~ include/linux/vmstat.h:522:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion] 522 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_" | ~~~~~~~~~~~ ^ ~~~ include/linux/vmstat.h:527:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 527 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 528 | NR_VM_NUMA_EVENT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~~ include/linux/vmstat.h:536:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 536 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 537 | NR_VM_NUMA_EVENT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~~ >> net/ipv4/tcp_comp.c:740:6: warning: no previous prototype for function 'comp_stream_read' [-Wmissing-prototypes] 740 | bool comp_stream_read(struct sock *sk) | ^ net/ipv4/tcp_comp.c:740:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 740 | bool comp_stream_read(struct sock *sk) | ^ | static >> net/ipv4/tcp_comp.c:779:6: warning: no previous prototype for function 'comp_setup_strp' [-Wmissing-prototypes] 779 | void comp_setup_strp(struct sock *sk, struct tcp_comp_context *ctx) | ^ net/ipv4/tcp_comp.c:779:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 779 | void comp_setup_strp(struct sock *sk, struct tcp_comp_context *ctx) | ^ | static 7 warnings generated. vim +/comp_stream_read +740 net/ipv4/tcp_comp.c 739 > 740 bool comp_stream_read(struct sock *sk) 741 { 742 struct tcp_comp_context *ctx = comp_get_ctx(sk); 743 744 if (!ctx) 745 return false; 746 747 if (ctx->rx.pkt || ctx->rx.dpkt) 748 return true; 749 750 return false; 751 } 752 753 static void comp_data_ready(struct sock *sk) 754 { 755 struct tcp_comp_context *ctx = comp_get_ctx(sk); 756 757 strp_data_ready(&ctx->rx.strp); 758 } 759 760 static void comp_queue(struct strparser *strp, struct sk_buff *skb) 761 { 762 struct tcp_comp_context *ctx = comp_get_ctx(strp->sk); 763 764 ctx->rx.pkt = skb; 765 strp_pause(strp); 766 ctx->rx.saved_data_ready(strp->sk); 767 } 768 769 static int comp_read_size(struct strparser *strp, struct sk_buff *skb) 770 { 771 struct strp_msg *rxm = strp_msg(skb); 772 773 if (rxm->offset > skb->len) 774 return 0; 775 776 return skb->len - rxm->offset; 777 } 778 > 779 void comp_setup_strp(struct sock *sk, struct tcp_comp_context *ctx) 780 { 781 struct strp_callbacks cb; 782 783 memset(&cb, 0, sizeof(cb)); 784 cb.rcv_msg = comp_queue; 785 cb.parse_msg = comp_read_size; 786 strp_init(&ctx->rx.strp, sk, &cb); 787 788 write_lock_bh(&sk->sk_callback_lock); 789 ctx->rx.saved_data_ready = sk->sk_data_ready; 790 sk->sk_data_ready = comp_data_ready; 791 write_unlock_bh(&sk->sk_callback_lock); 792 793 strp_check_rcv(&ctx->rx.strp); 794 } 795 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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[openeuler:OLK-6.6 3534/3534] arch/x86/entry/common.c:163: warning: Function parameter or member 'regs' not described in 'do_int80_emulation'
by kernel test robot 12 Dec '25

12 Dec '25

tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: 5930fa3740c518a9f6ba688fd0c1873d6f3adbce commit: 93117cefb1a33b3c93d9450d966ce333f5e4a4a8 [3534/3534] x86/bhi: Add support for clearing branch history at syscall entry config: x86_64-allnoconfig-bpf (https://download.01.org/0day-ci/archive/20251211/202512111900.HRlObqRh-lkp@…) compiler: gcc-14 (Debian 14.2.0-19) 14.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251211/202512111900.HRlObqRh-lkp@…) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp(a)intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202512111900.HRlObqRh-lkp@intel.com/ All warnings (new ones prefixed by >>): >> arch/x86/entry/common.c:163: warning: Function parameter or member 'regs' not described in 'do_int80_emulation' vim +163 arch/x86/entry/common.c ae4c9ae1882092 Thomas Gleixner 2024-01-02 142 e0df47ab7f352c Thomas Gleixner 2024-01-02 143 /** 93117cefb1a33b Pawan Gupta 2024-05-07 144 * do_int80_emulation - 32-bit legacy syscall C entry from asm e0df47ab7f352c Thomas Gleixner 2024-01-02 145 * e0df47ab7f352c Thomas Gleixner 2024-01-02 146 * This entry point can be used by 32-bit and 64-bit programs to perform e0df47ab7f352c Thomas Gleixner 2024-01-02 147 * 32-bit system calls. Instances of INT $0x80 can be found inline in e0df47ab7f352c Thomas Gleixner 2024-01-02 148 * various programs and libraries. It is also used by the vDSO's e0df47ab7f352c Thomas Gleixner 2024-01-02 149 * __kernel_vsyscall fallback for hardware that doesn't support a faster e0df47ab7f352c Thomas Gleixner 2024-01-02 150 * entry method. Restarted 32-bit system calls also fall back to INT e0df47ab7f352c Thomas Gleixner 2024-01-02 151 * $0x80 regardless of what instruction was originally used to do the e0df47ab7f352c Thomas Gleixner 2024-01-02 152 * system call. e0df47ab7f352c Thomas Gleixner 2024-01-02 153 * e0df47ab7f352c Thomas Gleixner 2024-01-02 154 * This is considered a slow path. It is not used by most libc e0df47ab7f352c Thomas Gleixner 2024-01-02 155 * implementations on modern hardware except during process startup. e0df47ab7f352c Thomas Gleixner 2024-01-02 156 * e0df47ab7f352c Thomas Gleixner 2024-01-02 157 * The arguments for the INT $0x80 based syscall are on stack in the e0df47ab7f352c Thomas Gleixner 2024-01-02 158 * pt_regs structure: e0df47ab7f352c Thomas Gleixner 2024-01-02 159 * eax: system call number e0df47ab7f352c Thomas Gleixner 2024-01-02 160 * ebx, ecx, edx, esi, edi, ebp: arg1 - arg 6 e0df47ab7f352c Thomas Gleixner 2024-01-02 161 */ 93117cefb1a33b Pawan Gupta 2024-05-07 162 __visible noinstr void do_int80_emulation(struct pt_regs *regs) e0df47ab7f352c Thomas Gleixner 2024-01-02 @163 { e0df47ab7f352c Thomas Gleixner 2024-01-02 164 int nr; e0df47ab7f352c Thomas Gleixner 2024-01-02 165 ae4c9ae1882092 Thomas Gleixner 2024-01-02 166 /* Kernel does not use INT $0x80! */ ae4c9ae1882092 Thomas Gleixner 2024-01-02 167 if (unlikely(!user_mode(regs))) { ae4c9ae1882092 Thomas Gleixner 2024-01-02 168 irqentry_enter(regs); ae4c9ae1882092 Thomas Gleixner 2024-01-02 169 instrumentation_begin(); ae4c9ae1882092 Thomas Gleixner 2024-01-02 170 panic("Unexpected external interrupt 0x80\n"); ae4c9ae1882092 Thomas Gleixner 2024-01-02 171 } ae4c9ae1882092 Thomas Gleixner 2024-01-02 172 ae4c9ae1882092 Thomas Gleixner 2024-01-02 173 /* ae4c9ae1882092 Thomas Gleixner 2024-01-02 174 * Establish kernel context for instrumentation, including for ae4c9ae1882092 Thomas Gleixner 2024-01-02 175 * int80_is_external() below which calls into the APIC driver. ae4c9ae1882092 Thomas Gleixner 2024-01-02 176 * Identical for soft and external interrupts. ae4c9ae1882092 Thomas Gleixner 2024-01-02 177 */ e0df47ab7f352c Thomas Gleixner 2024-01-02 178 enter_from_user_mode(regs); e0df47ab7f352c Thomas Gleixner 2024-01-02 179 e0df47ab7f352c Thomas Gleixner 2024-01-02 180 instrumentation_begin(); e0df47ab7f352c Thomas Gleixner 2024-01-02 181 add_random_kstack_offset(); e0df47ab7f352c Thomas Gleixner 2024-01-02 182 ae4c9ae1882092 Thomas Gleixner 2024-01-02 183 /* Validate that this is a soft interrupt to the extent possible */ ae4c9ae1882092 Thomas Gleixner 2024-01-02 184 if (unlikely(int80_is_external())) ae4c9ae1882092 Thomas Gleixner 2024-01-02 185 panic("Unexpected external interrupt 0x80\n"); ae4c9ae1882092 Thomas Gleixner 2024-01-02 186 e0df47ab7f352c Thomas Gleixner 2024-01-02 187 /* e0df47ab7f352c Thomas Gleixner 2024-01-02 188 * The low level idtentry code pushed -1 into regs::orig_ax e0df47ab7f352c Thomas Gleixner 2024-01-02 189 * and regs::ax contains the syscall number. e0df47ab7f352c Thomas Gleixner 2024-01-02 190 * e0df47ab7f352c Thomas Gleixner 2024-01-02 191 * User tracing code (ptrace or signal handlers) might assume e0df47ab7f352c Thomas Gleixner 2024-01-02 192 * that the regs::orig_ax contains a 32-bit number on invoking e0df47ab7f352c Thomas Gleixner 2024-01-02 193 * a 32-bit syscall. e0df47ab7f352c Thomas Gleixner 2024-01-02 194 * e0df47ab7f352c Thomas Gleixner 2024-01-02 195 * Establish the syscall convention by saving the 32bit truncated e0df47ab7f352c Thomas Gleixner 2024-01-02 196 * syscall number in regs::orig_ax and by invalidating regs::ax. e0df47ab7f352c Thomas Gleixner 2024-01-02 197 */ e0df47ab7f352c Thomas Gleixner 2024-01-02 198 regs->orig_ax = regs->ax & GENMASK(31, 0); e0df47ab7f352c Thomas Gleixner 2024-01-02 199 regs->ax = -ENOSYS; e0df47ab7f352c Thomas Gleixner 2024-01-02 200 e0df47ab7f352c Thomas Gleixner 2024-01-02 201 nr = syscall_32_enter(regs); e0df47ab7f352c Thomas Gleixner 2024-01-02 202 e0df47ab7f352c Thomas Gleixner 2024-01-02 203 local_irq_enable(); e0df47ab7f352c Thomas Gleixner 2024-01-02 204 nr = syscall_enter_from_user_mode_work(regs, nr); e0df47ab7f352c Thomas Gleixner 2024-01-02 205 do_syscall_32_irqs_on(regs, nr); e0df47ab7f352c Thomas Gleixner 2024-01-02 206 e0df47ab7f352c Thomas Gleixner 2024-01-02 207 instrumentation_end(); e0df47ab7f352c Thomas Gleixner 2024-01-02 208 syscall_exit_to_user_mode(regs); e0df47ab7f352c Thomas Gleixner 2024-01-02 209 } e0df47ab7f352c Thomas Gleixner 2024-01-02 210 #else /* CONFIG_IA32_EMULATION */ e0df47ab7f352c Thomas Gleixner 2024-01-02 211 :::::: The code at line 163 was first introduced by commit :::::: e0df47ab7f352c5f055d05102cc1dfcb43567ba8 x86/entry: Convert INT 0x80 emulation to IDTENTRY :::::: TO: Thomas Gleixner <tglx(a)linutronix.de> :::::: CC: Zheng Zengkai <zhengzengkai(a)huawei.com> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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[openeuler:OLK-6.6 3508/3508] drivers/acpi/pptt.c:411: warning: Function parameter or member 'acpi_cpu_id' not described in 'acpi_pptt_get_cpus_from_container'
by kernel test robot 12 Dec '25

12 Dec '25

tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: 5930fa3740c518a9f6ba688fd0c1873d6f3adbce commit: 45f065231c8fbabe4e1b4449425a0574287e2bbb [3508/3508] ACPI / PPTT: Add a helper to fill a cpumask from a processor container config: arm64-allnoconfig-bpf (https://download.01.org/0day-ci/archive/20251211/202512111902.thfID0yT-lkp@…) compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 4125e73cdc6188cca4c1c72b72e2b2d85c157483) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251211/202512111902.thfID0yT-lkp@…) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp(a)intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202512111902.thfID0yT-lkp@intel.com/ All warnings (new ones prefixed by >>): drivers/acpi/pptt.c:342: warning: Function parameter or member 'callback' not described in 'acpi_pptt_for_each_container' drivers/acpi/pptt.c:342: warning: Function parameter or member 'arg' not described in 'acpi_pptt_for_each_container' >> drivers/acpi/pptt.c:411: warning: Function parameter or member 'acpi_cpu_id' not described in 'acpi_pptt_get_cpus_from_container' >> drivers/acpi/pptt.c:411: warning: Function parameter or member 'cpus' not described in 'acpi_pptt_get_cpus_from_container' vim +411 drivers/acpi/pptt.c 400 401 /** 402 * acpi_pptt_get_cpus_from_container() - Populate a cpumask with all CPUs in a 403 * processor containers 404 * 405 * Find the specified Processor Container, and fill cpus with all the cpus 406 * below it. 407 * 408 * Return: 0 for a complete walk, or an error if the mask is incomplete. 409 */ 410 int acpi_pptt_get_cpus_from_container(u32 acpi_cpu_id, cpumask_t *cpus) > 411 { 412 struct __cpus_from_container_arg params; 413 414 params.acpi_cpu_id = acpi_cpu_id; 415 params.cpus = cpus; 416 417 cpumask_clear(cpus); 418 return acpi_pptt_for_each_container(&__cpus_from_container, &params); 419 } 420 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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[openeuler:OLK-6.6 3508/3508] htmldocs: ./include/drm/drm_fb_helper.h:107: warning: Function parameter or member 'KABI_RESERVE(1' not described in 'drm_fb_helper_funcs'
by kernel test robot 12 Dec '25

12 Dec '25

tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: 5930fa3740c518a9f6ba688fd0c1873d6f3adbce commit: 544aacc8da43991ecec944d135d89335642d7b3c [3508/3508] drm: drm_fb_helper.h: Add kabi_reserve reproduce: (https://download.01.org/0day-ci/archive/20251211/202512111820.FOuZzKT5-lkp@…) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp(a)intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202512111820.FOuZzKT5-lkp@intel.com/ All warnings (new ones prefixed by >>): ./include/drm/drm_connector.h:826: warning: Function parameter or member 'KABI_RESERVE(1' not described in 'drm_display_info' ./include/drm/drm_connector.h:888: warning: Function parameter or member 'KABI_RESERVE(1' not described in 'drm_tv_connector_state' ./include/drm/drm_connector.h:1350: warning: Function parameter or member 'KABI_RESERVE(1' not described in 'drm_connector_funcs' ./include/drm/drm_connector.h:1499: warning: Function parameter or member 'KABI_RESERVE(1' not described in 'drm_cmdline_mode' ./include/drm/drm_connector.h:1897: warning: Function parameter or member 'KABI_RESERVE(1' not described in 'drm_connector' >> ./include/drm/drm_fb_helper.h:107: warning: Function parameter or member 'KABI_RESERVE(1' not described in 'drm_fb_helper_funcs' >> ./include/drm/drm_fb_helper.h:217: warning: Function parameter or member 'KABI_RESERVE(1' not described in 'drm_fb_helper' Error: Cannot open file ./include/linux/hdmi.h Error: Cannot open file ./include/linux/hdmi.h Error: Cannot open file ./include/linux/host1x.h Error: Cannot open file ./include/linux/vga_switcheroo.h Error: Cannot open file ./include/linux/vga_switcheroo.h vim +107 ./include/drm/drm_fb_helper.h 386516744ba45d Dave Airlie 2010-03-30 67 207fd32970b1de Daniel Vetter 2013-01-20 68 /** 207fd32970b1de Daniel Vetter 2013-01-20 69 * struct drm_fb_helper_funcs - driver callbacks for the fbdev emulation library 207fd32970b1de Daniel Vetter 2013-01-20 70 * 207fd32970b1de Daniel Vetter 2013-01-20 71 * Driver callbacks used by the fbdev emulation helper library. 207fd32970b1de Daniel Vetter 2013-01-20 72 */ 4abe35204af82a Dave Airlie 2010-03-30 73 struct drm_fb_helper_funcs { 264d6970e16c68 Daniel Vetter 2015-12-04 74 /** 264d6970e16c68 Daniel Vetter 2015-12-04 75 * @fb_probe: 264d6970e16c68 Daniel Vetter 2015-12-04 76 * 264d6970e16c68 Daniel Vetter 2015-12-04 77 * Driver callback to allocate and initialize the fbdev info structure. 264d6970e16c68 Daniel Vetter 2015-12-04 78 * Furthermore it also needs to allocate the DRM framebuffer used to 264d6970e16c68 Daniel Vetter 2015-12-04 79 * back the fbdev. 264d6970e16c68 Daniel Vetter 2015-12-04 80 * 264d6970e16c68 Daniel Vetter 2015-12-04 81 * This callback is mandatory. 264d6970e16c68 Daniel Vetter 2015-12-04 82 * 264d6970e16c68 Daniel Vetter 2015-12-04 83 * RETURNS: 264d6970e16c68 Daniel Vetter 2015-12-04 84 * 264d6970e16c68 Daniel Vetter 2015-12-04 85 * The driver should return 0 on success and a negative error code on 264d6970e16c68 Daniel Vetter 2015-12-04 86 * failure. 264d6970e16c68 Daniel Vetter 2015-12-04 87 */ 4abe35204af82a Dave Airlie 2010-03-30 88 int (*fb_probe)(struct drm_fb_helper *helper, 4abe35204af82a Dave Airlie 2010-03-30 89 struct drm_fb_helper_surface_size *sizes); f231af498c29f3 Thomas Zimmermann 2022-11-03 90 f231af498c29f3 Thomas Zimmermann 2022-11-03 91 /** f231af498c29f3 Thomas Zimmermann 2022-11-03 92 * @fb_dirty: f231af498c29f3 Thomas Zimmermann 2022-11-03 93 * f231af498c29f3 Thomas Zimmermann 2022-11-03 94 * Driver callback to update the framebuffer memory. If set, fbdev f231af498c29f3 Thomas Zimmermann 2022-11-03 95 * emulation will invoke this callback in regular intervals after f231af498c29f3 Thomas Zimmermann 2022-11-03 96 * the framebuffer has been written. f231af498c29f3 Thomas Zimmermann 2022-11-03 97 * f231af498c29f3 Thomas Zimmermann 2022-11-03 98 * This callback is optional. f231af498c29f3 Thomas Zimmermann 2022-11-03 99 * f231af498c29f3 Thomas Zimmermann 2022-11-03 100 * Returns: f231af498c29f3 Thomas Zimmermann 2022-11-03 101 * 0 on success, or an error code otherwise. f231af498c29f3 Thomas Zimmermann 2022-11-03 102 */ f231af498c29f3 Thomas Zimmermann 2022-11-03 103 int (*fb_dirty)(struct drm_fb_helper *helper, struct drm_clip_rect *clip); 544aacc8da4399 Lin Yujun 2024-02-04 104 544aacc8da4399 Lin Yujun 2024-02-04 105 KABI_RESERVE(1) 544aacc8da4399 Lin Yujun 2024-02-04 106 KABI_RESERVE(2) 4abe35204af82a Dave Airlie 2010-03-30 @107 }; 4abe35204af82a Dave Airlie 2010-03-30 108 9685cd9df75c1f Rob Clark 2015-08-25 109 /** 264d6970e16c68 Daniel Vetter 2015-12-04 110 * struct drm_fb_helper - main structure to emulate fbdev on top of KMS 9685cd9df75c1f Rob Clark 2015-08-25 111 * @fb: Scanout framebuffer object 9685cd9df75c1f Rob Clark 2015-08-25 112 * @dev: DRM device 9685cd9df75c1f Rob Clark 2015-08-25 113 * @funcs: driver callbacks for fb helper 9877d8f6bc3749 Thomas Zimmermann 2022-11-03 114 * @info: emulated fbdev device info struct 9685cd9df75c1f Rob Clark 2015-08-25 115 * @pseudo_palette: fake palette of 16 colors 9622349ea1b623 Thomas Zimmermann 2020-11-20 116 * @damage_clip: clip rectangle used with deferred_io to accumulate damage to eaa434defaca17 Noralf Trønnes 2016-04-28 117 * the screen buffer 9622349ea1b623 Thomas Zimmermann 2020-11-20 118 * @damage_lock: spinlock protecting @damage_clip 7aa3d63e1ad56c Thomas Zimmermann 2022-11-18 119 * @damage_work: worker used to flush the framebuffer cfe63423d9be3e Noralf Trønnes 2016-08-23 120 * @resume_work: worker used during resume if the console lock is already taken 264d6970e16c68 Daniel Vetter 2015-12-04 121 * 264d6970e16c68 Daniel Vetter 2015-12-04 122 * This is the main structure used by the fbdev helpers. Drivers supporting 264d6970e16c68 Daniel Vetter 2015-12-04 123 * fbdev emulation should embedded this into their overall driver structure. ea0dd85a75f151 Daniel Vetter 2016-12-29 124 * Drivers must also fill out a &struct drm_fb_helper_funcs with a few 264d6970e16c68 Daniel Vetter 2015-12-04 125 * operations. 9685cd9df75c1f Rob Clark 2015-08-25 126 */ 785b93ef8c3097 Dave Airlie 2009-08-28 127 struct drm_fb_helper { d536540f304ce0 Noralf Trønnes 2018-07-03 128 /** d536540f304ce0 Noralf Trønnes 2018-07-03 129 * @client: d536540f304ce0 Noralf Trønnes 2018-07-03 130 * d536540f304ce0 Noralf Trønnes 2018-07-03 131 * DRM client used by the generic fbdev emulation. d536540f304ce0 Noralf Trønnes 2018-07-03 132 */ d536540f304ce0 Noralf Trønnes 2018-07-03 133 struct drm_client_dev client; d536540f304ce0 Noralf Trønnes 2018-07-03 134 d536540f304ce0 Noralf Trønnes 2018-07-03 135 /** d536540f304ce0 Noralf Trønnes 2018-07-03 136 * @buffer: d536540f304ce0 Noralf Trønnes 2018-07-03 137 * d536540f304ce0 Noralf Trønnes 2018-07-03 138 * Framebuffer used by the generic fbdev emulation. d536540f304ce0 Noralf Trønnes 2018-07-03 139 */ d536540f304ce0 Noralf Trønnes 2018-07-03 140 struct drm_client_buffer *buffer; d536540f304ce0 Noralf Trønnes 2018-07-03 141 785b93ef8c3097 Dave Airlie 2009-08-28 142 struct drm_framebuffer *fb; 785b93ef8c3097 Dave Airlie 2009-08-28 143 struct drm_device *dev; 3a4938799dec32 Thierry Reding 2014-06-27 144 const struct drm_fb_helper_funcs *funcs; 9877d8f6bc3749 Thomas Zimmermann 2022-11-03 145 struct fb_info *info; 386516744ba45d Dave Airlie 2010-03-30 146 u32 pseudo_palette[17]; 9622349ea1b623 Thomas Zimmermann 2020-11-20 147 struct drm_clip_rect damage_clip; 9622349ea1b623 Thomas Zimmermann 2020-11-20 148 spinlock_t damage_lock; 7aa3d63e1ad56c Thomas Zimmermann 2022-11-18 149 struct work_struct damage_work; cfe63423d9be3e Noralf Trønnes 2016-08-23 150 struct work_struct resume_work; 264d6970e16c68 Daniel Vetter 2015-12-04 151 e9827d8ea2142d Thierry Reding 2017-07-04 152 /** e9827d8ea2142d Thierry Reding 2017-07-04 153 * @lock: e9827d8ea2142d Thierry Reding 2017-07-04 154 * e9827d8ea2142d Thierry Reding 2017-07-04 155 * Top-level FBDEV helper lock. This protects all internal data e9827d8ea2142d Thierry Reding 2017-07-04 156 * structures and lists, such as @connector_info and @crtc_info. e9827d8ea2142d Thierry Reding 2017-07-04 157 * e9827d8ea2142d Thierry Reding 2017-07-04 158 * FIXME: fbdev emulation locking is a mess and long term we want to e9827d8ea2142d Thierry Reding 2017-07-04 159 * protect all helper internal state with this lock as well as reduce e9827d8ea2142d Thierry Reding 2017-07-04 160 * core KMS locking as much as possible. e9827d8ea2142d Thierry Reding 2017-07-04 161 */ e9827d8ea2142d Thierry Reding 2017-07-04 162 struct mutex lock; e9827d8ea2142d Thierry Reding 2017-07-04 163 264d6970e16c68 Daniel Vetter 2015-12-04 164 /** 264d6970e16c68 Daniel Vetter 2015-12-04 165 * @kernel_fb_list: 264d6970e16c68 Daniel Vetter 2015-12-04 166 * 264d6970e16c68 Daniel Vetter 2015-12-04 167 * Entry on the global kernel_fb_helper_list, used for kgdb entry/exit. 264d6970e16c68 Daniel Vetter 2015-12-04 168 */ 785b93ef8c3097 Dave Airlie 2009-08-28 169 struct list_head kernel_fb_list; 8be48d924c307e Dave Airlie 2010-03-30 170 264d6970e16c68 Daniel Vetter 2015-12-04 171 /** 264d6970e16c68 Daniel Vetter 2015-12-04 172 * @delayed_hotplug: 264d6970e16c68 Daniel Vetter 2015-12-04 173 * 264d6970e16c68 Daniel Vetter 2015-12-04 174 * A hotplug was received while fbdev wasn't in control of the DRM 264d6970e16c68 Daniel Vetter 2015-12-04 175 * device, i.e. another KMS master was active. The output configuration 264d6970e16c68 Daniel Vetter 2015-12-04 176 * needs to be reprobe when fbdev is in control again. 264d6970e16c68 Daniel Vetter 2015-12-04 177 */ 4abe35204af82a Dave Airlie 2010-03-30 178 bool delayed_hotplug; ca91a2758fcef6 Daniel Vetter 2017-07-06 179 ca91a2758fcef6 Daniel Vetter 2017-07-06 180 /** ca91a2758fcef6 Daniel Vetter 2017-07-06 181 * @deferred_setup: ca91a2758fcef6 Daniel Vetter 2017-07-06 182 * ca91a2758fcef6 Daniel Vetter 2017-07-06 183 * If no outputs are connected (disconnected or unknown) the FB helper ca91a2758fcef6 Daniel Vetter 2017-07-06 184 * code will defer setup until at least one of the outputs shows up. ca91a2758fcef6 Daniel Vetter 2017-07-06 185 * This field keeps track of the status so that setup can be retried ca91a2758fcef6 Daniel Vetter 2017-07-06 186 * at every hotplug event until it succeeds eventually. ca91a2758fcef6 Daniel Vetter 2017-07-06 187 * ca91a2758fcef6 Daniel Vetter 2017-07-06 188 * Protected by @lock. ca91a2758fcef6 Daniel Vetter 2017-07-06 189 */ ca91a2758fcef6 Daniel Vetter 2017-07-06 190 bool deferred_setup; ca91a2758fcef6 Daniel Vetter 2017-07-06 191 ca91a2758fcef6 Daniel Vetter 2017-07-06 192 /** ca91a2758fcef6 Daniel Vetter 2017-07-06 193 * @preferred_bpp: ca91a2758fcef6 Daniel Vetter 2017-07-06 194 * ca91a2758fcef6 Daniel Vetter 2017-07-06 195 * Temporary storage for the driver's preferred BPP setting passed to ca91a2758fcef6 Daniel Vetter 2017-07-06 196 * FB helper initialization. This needs to be tracked so that deferred ca91a2758fcef6 Daniel Vetter 2017-07-06 197 * FB helper setup can pass this on. ca91a2758fcef6 Daniel Vetter 2017-07-06 198 * ca91a2758fcef6 Daniel Vetter 2017-07-06 199 * See also: @deferred_setup ca91a2758fcef6 Daniel Vetter 2017-07-06 200 */ ca91a2758fcef6 Daniel Vetter 2017-07-06 201 int preferred_bpp; e7c5c29a9eb1c9 Thomas Zimmermann 2022-11-03 202 d6591da5f3ff28 Javier Martinez Canillas 2023-01-21 203 #ifdef CONFIG_FB_DEFERRED_IO d6591da5f3ff28 Javier Martinez Canillas 2023-01-21 204 /** d6591da5f3ff28 Javier Martinez Canillas 2023-01-21 205 * @fbdefio: d6591da5f3ff28 Javier Martinez Canillas 2023-01-21 206 * d6591da5f3ff28 Javier Martinez Canillas 2023-01-21 207 * Temporary storage for the driver's FB deferred I/O handler. If the d6591da5f3ff28 Javier Martinez Canillas 2023-01-21 208 * driver uses the DRM fbdev emulation layer, this is set by the core d6591da5f3ff28 Javier Martinez Canillas 2023-01-21 209 * to a generic deferred I/O handler if a driver is preferring to use d6591da5f3ff28 Javier Martinez Canillas 2023-01-21 210 * a shadow buffer. d6591da5f3ff28 Javier Martinez Canillas 2023-01-21 211 */ d6591da5f3ff28 Javier Martinez Canillas 2023-01-21 212 struct fb_deferred_io fbdefio; d6591da5f3ff28 Javier Martinez Canillas 2023-01-21 213 #endif 544aacc8da4399 Lin Yujun 2024-02-04 214 544aacc8da4399 Lin Yujun 2024-02-04 215 KABI_RESERVE(1) 544aacc8da4399 Lin Yujun 2024-02-04 216 KABI_RESERVE(2) 785b93ef8c3097 Dave Airlie 2009-08-28 @217 }; 785b93ef8c3097 Dave Airlie 2009-08-28 218 :::::: The code at line 107 was first introduced by commit :::::: 4abe35204af82a018ca3ce6db4102aa09719698e drm/kms/fb: use slow work mechanism for normal hotplug also. :::::: TO: Dave Airlie <airlied(a)redhat.com> :::::: CC: Dave Airlie <airlied(a)redhat.com> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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[openeuler:OLK-6.6 3534/3534] kernel/irq/proc.c:334:13: warning: no previous prototype for function 'register_irqchip_proc'
by kernel test robot 12 Dec '25

12 Dec '25

Hi Jinjie, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: 5930fa3740c518a9f6ba688fd0c1873d6f3adbce commit: 3053668e6b211924bb67c19d791a5a532eca2ad8 [3534/3534] arm64: Introduce Xint software solution config: arm64-allnoconfig-bpf (https://download.01.org/0day-ci/archive/20251211/202512111720.WtJhXDC4-lkp@…) compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 4125e73cdc6188cca4c1c72b72e2b2d85c157483) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251211/202512111720.WtJhXDC4-lkp@…) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp(a)intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202512111720.WtJhXDC4-lkp@intel.com/ All warnings (new ones prefixed by >>): In file included from <built-in>:3: In file included from ././include/linux/compiler_types.h:150: ./include/linux/compiler-clang.h:33:9: warning: '__SANITIZE_ADDRESS__' macro redefined [-Wmacro-redefined] 33 | #define __SANITIZE_ADDRESS__ | ^ <built-in>:367:9: note: previous definition is here 367 | #define __SANITIZE_ADDRESS__ 1 | ^ >> kernel/irq/proc.c:334:13: warning: no previous prototype for function 'register_irqchip_proc' [-Wmissing-prototypes] 334 | void __weak register_irqchip_proc(struct irq_desc *desc, void *irqp) { } | ^ kernel/irq/proc.c:334:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 334 | void __weak register_irqchip_proc(struct irq_desc *desc, void *irqp) { } | ^ | static >> kernel/irq/proc.c:335:13: warning: no previous prototype for function 'unregister_irqchip_proc' [-Wmissing-prototypes] 335 | void __weak unregister_irqchip_proc(struct irq_desc *desc) { } | ^ kernel/irq/proc.c:335:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 335 | void __weak unregister_irqchip_proc(struct irq_desc *desc) { } | ^ | static 3 warnings generated. vim +/register_irqchip_proc +334 kernel/irq/proc.c 333 > 334 void __weak register_irqchip_proc(struct irq_desc *desc, void *irqp) { } > 335 void __weak unregister_irqchip_proc(struct irq_desc *desc) { } 336 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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[openeuler:OLK-6.6 3534/3534] htmldocs: ./kernel/livepatch/core.c:2046: warning: bad line:
by kernel test robot 12 Dec '25

12 Dec '25

Hi Zheng, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: 5930fa3740c518a9f6ba688fd0c1873d6f3adbce commit: 29f85d3cff2dfa35ace94d3e4036d5ea456eb859 [3534/3534] livepatch: Add klp_module_delete_safety_check reproduce: (https://download.01.org/0day-ci/archive/20251211/202512111739.Q8ijhkEi-lkp@…) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp(a)intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202512111739.Q8ijhkEi-lkp@intel.com/ All warnings (new ones prefixed by >>): Error: Cannot open file ./include/linux/hid_bpf.h Error: Cannot open file ./include/linux/hid.h Error: Cannot open file ./include/linux/i2c-atr.h Error: Cannot open file ./include/linux/mutex.h Error: Cannot open file ./include/linux/mutex.h >> ./kernel/livepatch/core.c:2046: warning: bad line: Error: Cannot open file ./include/linux/livepatch.h Error: Cannot open file ./include/linux/seqlock.h Error: Cannot open file ./include/linux/damon.h Error: Cannot open file ./include/linux/highmem.h Error: Cannot open file ./include/linux/highmem-internal.h vim +2046 ./kernel/livepatch/core.c 2033 2034 /** 2035 * klp_module_delete_safety_check() - safety check in livepatch scenario when delete a module 2036 * @mod: Module to be deleted 2037 * 2038 * Module refcnt ensures that there is no rare case between enable_patch and delete_module: 2039 * 1. safety_check -> try_enable_patch -> try_release_module_ref: 2040 * try_enable_patch would increase module refcnt, which cause try_release_module_ref fails. 2041 * 2. safety_check -> try_release_module_ref -> try_enable_patch: 2042 * after release module ref, try_enable_patch would fail because try_module_get fails. 2043 * So the problem that release resources unsafely when enable livepatch after safety_check is 2044 * passed during module deletion does not exist, complex synchronization protection is not 2045 * required. > 2046 2047 * Return: 0 on success, otherwise error 2048 */ 2049 int klp_module_delete_safety_check(struct module *mod) 2050 { 2051 int ret; 2052 2053 if (!mod || !is_livepatch_module(mod)) 2054 return 0; 2055 2056 ret = stop_machine(arch_klp_module_check_calltrace, (void *)mod, NULL); 2057 if (ret) { 2058 pr_debug("failed to check klp module calltrace: %d\n", ret); 2059 return ret; 2060 } 2061 2062 return 0; 2063 } 2064 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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[openeuler:OLK-6.6 3536/3536] kernel/livepatch/core.c:2046: warning: bad line:
by kernel test robot 12 Dec '25

12 Dec '25

Hi Zheng, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: 5930fa3740c518a9f6ba688fd0c1873d6f3adbce commit: 29f85d3cff2dfa35ace94d3e4036d5ea456eb859 [3536/3536] livepatch: Add klp_module_delete_safety_check config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20251212/202512120043.Ja8LDkyR-lkp@…) compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251212/202512120043.Ja8LDkyR-lkp@…) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp(a)intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202512120043.Ja8LDkyR-lkp@intel.com/ All warnings (new ones prefixed by >>): >> kernel/livepatch/core.c:2046: warning: bad line: vim +2046 kernel/livepatch/core.c 2033 2034 /** 2035 * klp_module_delete_safety_check() - safety check in livepatch scenario when delete a module 2036 * @mod: Module to be deleted 2037 * 2038 * Module refcnt ensures that there is no rare case between enable_patch and delete_module: 2039 * 1. safety_check -> try_enable_patch -> try_release_module_ref: 2040 * try_enable_patch would increase module refcnt, which cause try_release_module_ref fails. 2041 * 2. safety_check -> try_release_module_ref -> try_enable_patch: 2042 * after release module ref, try_enable_patch would fail because try_module_get fails. 2043 * So the problem that release resources unsafely when enable livepatch after safety_check is 2044 * passed during module deletion does not exist, complex synchronization protection is not 2045 * required. > 2046 2047 * Return: 0 on success, otherwise error 2048 */ 2049 int klp_module_delete_safety_check(struct module *mod) 2050 { 2051 int ret; 2052 2053 if (!mod || !is_livepatch_module(mod)) 2054 return 0; 2055 2056 ret = stop_machine(arch_klp_module_check_calltrace, (void *)mod, NULL); 2057 if (ret) { 2058 pr_debug("failed to check klp module calltrace: %d\n", ret); 2059 return ret; 2060 } 2061 2062 return 0; 2063 } 2064 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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