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[PATCH OLK-6.6 00/11] xsched: XCU Partition
by Zicheng Qu 26 Nov '25

26 Nov '25

Zicheng Qu (11): xsched: unify log prefix format and remove duplicated prefix macros xsched: enforce valid xsched scheduler config dependencies xsched: add missing spin_unlock() in xcu_move_task() error path xsched: avoid sleeping while holding spinlock in xcu_move_task() xsched: remove parent->lock and rely on cgroup_mutex for shares update xsched: unify root detection logic for cgroups xsched: replace hard-coded numeric values xsched: modify the logic for inc and dec the count value xsched: add null check for sched in xsched_xse_set_class xsched: rename vstream->id to vstream->sq_id xsched: move stream_lock into xsched_vsm_add_tail() to avoid sleeping in atomic context arch/arm64/configs/openeuler_defconfig | 6 +- arch/x86/configs/openeuler_defconfig | 6 +- drivers/xcu/xcu_group.c | 2 + include/linux/vstream.h | 2 +- include/linux/xsched.h | 76 ++++++++--------------- kernel/xsched/Kconfig | 14 ++++- kernel/xsched/cgroup.c | 79 ++++++++++-------------- kernel/xsched/core.c | 83 ++++++++++++++------------ kernel/xsched/vstream.c | 29 +++------ 9 files changed, 134 insertions(+), 163 deletions(-) -- 2.34.1

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[PATCH OLK-6.6 0/3] fix cve-2025-40300
by Bowen You 26 Nov '25

26 Nov '25

fix cve 2025-40300 Pawan Gupta (3): x86/vmscape: Add conditional IBPB mitigation x86/vmscape: Enumerate VMSCAPE bug x86/vmscape: Enable the mitigation .../ABI/testing/sysfs-devices-system-cpu | 1 + .../admin-guide/kernel-parameters.txt | 11 +++ arch/x86/Kconfig | 9 ++ arch/x86/include/asm/cpufeatures.h | 2 + arch/x86/include/asm/entry-common.h | 7 ++ arch/x86/include/asm/nospec-branch.h | 2 + arch/x86/kernel/cpu/bugs.c | 85 +++++++++++++++++++ arch/x86/kernel/cpu/common.c | 58 +++++++++---- arch/x86/kvm/x86.c | 9 ++ drivers/base/cpu.c | 3 + 10 files changed, 169 insertions(+), 18 deletions(-) -- 2.34.1

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[PATCH OLK-5.10 0/8] fix cves
by Wupeng Ma 26 Nov '25

26 Nov '25

fix the fellowing cves: - CVE-2025-38084 - CVE-2025-21693 - CVE-2021-47653 Chengming Zhou (1): mm/zswap: change per-cpu mutex and buffer to per-acomp_ctx Dmitry Nikiforov (1): media: davinci: vpif: Fix memory leak in probe error path James Houghton (1): hugetlb: unshare some PMDs when splitting VMAs Jann Horn (1): mm/hugetlb: unshare page tables during VMA split, not before Johan Hovold (1): media: davinci: vpif: fix use-after-free on driver unbind Yosry Ahmed (3): mm: zswap: properly synchronize freeing resources during CPU hotunplug mm: zswap: move allocations during CPU init outside the lock mm: zswap: fix crypto_free_acomp() deadlock in zswap_cpu_comp_dead() drivers/media/platform/davinci/vpif.c | 99 ++++++++++---- include/linux/cpuhotplug.h | 2 +- include/linux/hugetlb.h | 6 + mm/hugetlb.c | 92 +++++++++++++ mm/mmap.c | 8 ++ mm/zswap.c | 186 ++++++++++++++------------ 6 files changed, 280 insertions(+), 113 deletions(-) -- 2.43.0

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[PATCH OLK-6.6 0/5] fix cves
by Wupeng Ma 26 Nov '25

26 Nov '25

fix the fellowing cves: - CVE-2025-38084 - CVE-2025-21693 - CVE-2021-47653 Chengming Zhou (1): mm/zswap: change per-cpu mutex and buffer to per-acomp_ctx Jann Horn (1): mm/hugetlb: unshare page tables during VMA split, not before Yosry Ahmed (3): mm: zswap: properly synchronize freeing resources during CPU hotunplug mm: zswap: move allocations during CPU init outside the lock mm: zswap: fix crypto_free_acomp() deadlock in zswap_cpu_comp_dead() include/linux/cpuhotplug.h | 2 +- include/linux/hugetlb.h | 3 + mm/hugetlb.c | 60 ++++++++---- mm/mmap.c | 6 ++ mm/zswap.c | 187 ++++++++++++++++++++----------------- 5 files changed, 154 insertions(+), 104 deletions(-) -- 2.43.0

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[PATCH OLK-5.10 0/6] fix cves
by Wupeng Ma 26 Nov '25

26 Nov '25

fix the fellowing cves: - CVE-2025-38084 - CVE-2025-21693 - CVE-2021-47653 Chengming Zhou (1): mm/zswap: change per-cpu mutex and buffer to per-acomp_ctx James Houghton (1): hugetlb: unshare some PMDs when splitting VMAs Jann Horn (1): mm/hugetlb: unshare page tables during VMA split, not before Johan Hovold (1): media: davinci: vpif: fix use-after-free on driver unbind Yosry Ahmed (2): mm: zswap: properly synchronize freeing resources during CPU hotunplug mm: zswap: move allocations during CPU init outside the lock drivers/media/platform/davinci/vpif.c | 97 +++++++++++----- include/linux/cpuhotplug.h | 2 +- include/linux/hugetlb.h | 6 + mm/hugetlb.c | 92 +++++++++++++++ mm/mmap.c | 8 ++ mm/zswap.c | 160 +++++++++++++------------- 6 files changed, 258 insertions(+), 107 deletions(-) -- 2.43.0

2 7

[PATCH OLK-6.6 0/4] fix cves for 6.6
by Wupeng Ma 26 Nov '25

26 Nov '25

fix the following cve: - CVE-2025-38084 - CVE-2025-21693 Chengming Zhou (1): mm/zswap: change per-cpu mutex and buffer to per-acomp_ctx Jann Horn (1): mm/hugetlb: unshare page tables during VMA split, not before Yosry Ahmed (2): mm: zswap: properly synchronize freeing resources during CPU hotunplug mm: zswap: move allocations during CPU init outside the lock include/linux/cpuhotplug.h | 2 +- include/linux/hugetlb.h | 3 + mm/hugetlb.c | 60 ++++++++++---- mm/mmap.c | 6 ++ mm/zswap.c | 161 ++++++++++++++++++------------------- 5 files changed, 134 insertions(+), 98 deletions(-) -- 2.43.0

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[PATCH OLK-6.6 00/11] xsched: XCU Partition
by Zicheng Qu 26 Nov '25

26 Nov '25

Zicheng Qu (11): xsched: unify log prefix format and remove duplicated prefix macros xsched: enforce valid xsched scheduler config dependencies xsched: add missing spin_unlock() in xcu_move_task() error path xsched: avoid sleeping while holding spinlock in xcu_move_task() xsched: remove parent->lock and rely on cgroup_mutex for shares update xsched: unify root detection logic for cgroups xsched: replace hard-coded numeric values xsched: modify the logic for inc and dec the count value xsched: add null check for sched in xsched_xse_set_class xsched: rename vstream->id to vstream->sq_id xsched: move stream_lock into xsched_vsm_add_tail() to avoid sleeping in atomic context arch/arm64/configs/openeuler_defconfig | 6 +- arch/x86/configs/openeuler_defconfig | 6 +- drivers/xcu/xcu_group.c | 2 + include/linux/vstream.h | 2 +- include/linux/xsched.h | 76 ++++++++--------------- kernel/xsched/Kconfig | 5 +- kernel/xsched/cgroup.c | 79 ++++++++++-------------- kernel/xsched/core.c | 83 ++++++++++++++------------ kernel/xsched/vstream.c | 29 +++------ 9 files changed, 125 insertions(+), 163 deletions(-) -- 2.34.1

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[openeuler:OLK-6.6 3316/3316] kernel/xsched/cgroup.c:368:6: warning: no previous prototype for 'xcu_move_task'
by kernel test robot 26 Nov '25

26 Nov '25

tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: 0fa9557473e665984ed5e97515969035324b2ec5 commit: 43bbefc53356009d3603faa2c6e6a2858f724e4d [3316/3316] xsched: Add XCU control group implementation and its backend in xsched CFS config: x86_64-buildonly-randconfig-002-20251125 (https://download.01.org/0day-ci/archive/20251126/202511260440.XtGIX1Qz-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/20251126/202511260440.XtGIX1Qz-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/202511260440.XtGIX1Qz-lkp@intel.com/ All warnings (new ones prefixed by >>): >> kernel/xsched/cgroup.c:368:6: warning: no previous prototype for 'xcu_move_task' [-Wmissing-prototypes] 368 | void xcu_move_task(struct task_struct *task, struct xsched_group *old_xcg, | ^~~~~~~~~~~~~ -- kernel/xsched/cfs.c:56: warning: Function parameter or member 'xse_cfs' not described in 'xs_cfs_rq_update' kernel/xsched/cfs.c:56: warning: Function parameter or member 'new_xrt' not described in 'xs_cfs_rq_update' >> kernel/xsched/cfs.c:103: warning: Function parameter or member 'xg' not described in 'xg_update' >> kernel/xsched/cfs.c:103: warning: Function parameter or member 'task_delta' not described in 'xg_update' >> kernel/xsched/cfs.c:103: warning: Excess function parameter 'gxcu' description in 'xg_update' -- >> kernel/xsched/cgroup.c:46: warning: Cannot understand * @brief Initialize the core components of an xsched_group. on line 46 - I thought it was a doc line vim +/xcu_move_task +368 kernel/xsched/cgroup.c 367 > 368 void xcu_move_task(struct task_struct *task, struct xsched_group *old_xcg, 369 struct xsched_group *new_xcg) 370 { 371 struct xsched_entity *xse, *tmp; 372 struct xsched_cu *xcu; 373 374 spin_lock(&old_xcg->lock); 375 list_for_each_entry_safe(xse, tmp, &old_xcg->members, group_node) { 376 if (xse->owner_pid != task_pid_nr(task)) 377 continue; 378 379 xcu = xse->xcu; 380 381 if (old_xcg != xse->parent_grp) { 382 WARN_ON(old_xcg != xse->parent_grp); 383 return; 384 } 385 386 /* delete from the old_xcg */ 387 list_del(&xse->group_node); 388 389 mutex_lock(&xcu->xcu_lock); 390 /* dequeue from the current runqueue */ 391 dequeue_ctx(xse, xcu); 392 /* attach to the new_xcg */ 393 xsched_group_xse_attach(new_xcg, xse); 394 /* enqueue to the runqueue in new_xcg */ 395 enqueue_ctx(xse, xcu); 396 mutex_unlock(&xcu->xcu_lock); 397 } 398 spin_unlock(&old_xcg->lock); 399 } 400 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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[openeuler:openEuler-1.0-LTS] BUILD REGRESSION 4ffe43c9c280969676fa933f022ebf1a8aaebcdb
by kernel test robot 26 Nov '25

26 Nov '25

tree/branch: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS branch HEAD: 4ffe43c9c280969676fa933f022ebf1a8aaebcdb !19055 scsi: ses: Fix possible addl_desc_ptr out-of-bounds accesses Error/Warning (recently discovered and may have been fixed): https://lore.kernel.org/oe-kbuild-all/202511251827.iPD7MiMU-lkp@intel.com block/blk-mq-debugfs-zoned.o: warning: objtool: missing symbol for section .text crypto/sm4_generic.o: warning: objtool: missing symbol for section .text drivers/infiniband/hw/usnic/usnic_ib_qp_grp.o: warning: objtool: missing symbol for section .text drivers/net/ethernet/huawei/bma/kbox_drv/kbox_dump.o: warning: objtool: missing symbol for section .text drivers/net/ethernet/huawei/bma/kbox_drv/kbox_panic.o: warning: objtool: missing symbol for section .text drivers/net/ethernet/huawei/bma/kbox_drv/kbox_ram_image.o: warning: objtool: missing symbol for section .text drivers/net/ethernet/huawei/bma/kbox_drv/kbox_ram_op.o: warning: objtool: missing symbol for section .text drivers/net/wireless/intel/iwlwifi/fw/acpi.o: warning: objtool: missing symbol for section .text drivers/net/wireless/intel/iwlwifi/fw/notif-wait.o: warning: objtool: missing symbol for section .text drivers/net/wireless/intel/iwlwifi/fw/smem.o: warning: objtool: missing symbol for section .text drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.o: warning: objtool: missing symbol for section .text drivers/net/wireless/intel/iwlwifi/mvm/nvm.o: warning: objtool: missing symbol for section .text include/linux/mempolicy.h:329:13: warning: '__do_mbind' defined but not used [-Wunused-function] Unverified Error/Warning (likely false positive, kindly check if interested): (.text+0x26a4): undefined reference to `_init' (.text+0x31): undefined reference to `_DYNAMIC' (.text+0x41): undefined reference to `_fini' /usr/include/bits/floatn.h:97:9: error: __float128 is not supported on this target crypto/ecc.c:1112:9: warning: 'priv' may be used uninitialized [-Wmaybe-uninitialized] include/linux/list.h:63:20: warning: storing the address of local variable 'wait' in '((struct list_head *)x)[1].prev' [-Wdangling-pointer=] include/linux/list.h:63:20: warning: storing the address of local variable 'waiter' in '*(struct list_head *)((char *)sem + 8).prev' [-Wdangling-pointer=] include/linux/printk.h:346:9: warning: this statement may fall through [-Wimplicit-fallthrough=] include/linux/signal.h:180:29: warning: this statement may fall through [-Wimplicit-fallthrough=] include/linux/skbuff.h:1869:9: warning: array subscript 'struct sk_buff[0]' is partly outside array bounds of 'struct ieee80211_tx_data[1]' [-Warray-bounds] include/linux/skbuff.h:1875:9: warning: array subscript 'struct sk_buff[0]' is partly outside array bounds of 'struct ieee80211_tx_data[1]' [-Warray-bounds=] include/linux/string.h:333:16: warning: '__builtin_memset' offset [48, 55] is out of the bounds [0, 48] [-Warray-bounds] Error/Warning ids grouped by kconfigs: recent_errors |-- arm64-allnoconfig | |-- include-linux-list.h:warning:storing-the-address-of-local-variable-wait-in-((struct-list_head-)x)-.prev | |-- include-linux-list.h:warning:storing-the-address-of-local-variable-waiter-in-(struct-list_head-)((char-)sem-).prev | |-- include-linux-mempolicy.h:warning:__do_mbind-defined-but-not-used | |-- include-linux-printk.h:warning:this-statement-may-fall-through | |-- include-linux-signal.h:warning:this-statement-may-fall-through | |-- init-calibrate.c:warning:no-previous-prototype-for-calibration_delay_done | |-- mm-rmap.c:warning:no-previous-prototype-for-is_vma_temporary_stack | `-- mm-rmap.c:warning:variable-cstart-set-but-not-used |-- arm64-defconfig | |-- crypto-ecc.c:warning:priv-may-be-used-uninitialized | |-- include-asm-generic-io.h:warning:this-statement-may-fall-through | |-- include-linux-list.h:warning:storing-the-address-of-local-variable-waiter-in-(struct-list_head-)((char-)sem-).prev | |-- include-linux-printk.h:warning:this-statement-may-fall-through | |-- include-linux-signal.h:warning:this-statement-may-fall-through | |-- include-linux-skbuff.h:warning:array-subscript-struct-sk_buff-is-partly-outside-array-bounds-of-struct-ieee80211_tx_data | |-- init-calibrate.c:warning:no-previous-prototype-for-calibration_delay_done | `-- mm-memcontrol.c:warning:bad-line:otherwise. |-- arm64-randconfig-001-20251125 | |-- crypto-ecc.c:warning:priv-may-be-used-uninitialized | |-- crypto-lrw.c:warning:conflicting-types-for-built-in-function-free-expected-void(void-) | |-- crypto-xts.c:warning:conflicting-types-for-built-in-function-free-expected-void(void-) | |-- include-asm-generic-io.h:warning:reg-may-be-used-uninitialized-in-this-function | |-- include-asm-generic-io.h:warning:this-statement-may-fall-through | |-- include-linux-signal.h:warning:this-statement-may-fall-through | |-- include-linux-skbuff.h:warning:array-subscript-struct-sk_buff-is-partly-outside-array-bounds-of-struct-ieee80211_tx_data | |-- include-linux-string.h:warning:__builtin_memset-offset-is-out-of-the-bounds | |-- include-media-v4l2-mediabus.h:warning:mbus_fmt-may-be-used-uninitialized | `-- init-calibrate.c:warning:no-previous-prototype-for-calibration_delay_done |-- arm64-randconfig-002-20251125 | |-- crypto-xts.c:warning:conflicting-types-for-built-in-function-free-expected-void(void-) | |-- include-linux-signal.h:warning:this-statement-may-fall-through | |-- include-linux-unaligned-access_ok.h:warning:array-subscript-is-outside-array-bounds-of-struct-retrieve_data_struct_cmd | `-- init-calibrate.c:warning:no-previous-prototype-for-calibration_delay_done |-- arm64-randconfig-003-20251125 | |-- include-linux-signal.h:warning:this-statement-may-fall-through | |-- init-calibrate.c:warning:no-previous-prototype-for-calibration_delay_done | |-- mm-memcontrol.c:warning:bad-line:otherwise. | |-- mm-rmap.c:warning:no-previous-prototype-for-is_vma_temporary_stack | `-- mm-rmap.c:warning:variable-cstart-set-but-not-used |-- arm64-randconfig-004-20251125 | |-- crypto-lrw.c:warning:conflicting-types-for-built-in-function-free-expected-void(void-) | |-- crypto-xts.c:warning:conflicting-types-for-built-in-function-free-expected-void(void-) | |-- include-linux-signal.h:warning:this-statement-may-fall-through | `-- init-calibrate.c:warning:no-previous-prototype-for-calibration_delay_done |-- x86_64-allnoconfig | |-- mm-rmap.c:warning:variable-cstart-set-but-not-used | `-- mm-vmscan.c:error:implicit-declaration-of-function-kernel_swap_enabled-Werror-Wimplicit-function-declaration |-- x86_64-allnoconfig-bpf | |-- (.text):undefined-reference-to-_DYNAMIC | |-- (.text):undefined-reference-to-_fini | |-- (.text):undefined-reference-to-_init | `-- usr-include-bits-floatn.h:error:__float128-is-not-supported-on-this-target |-- x86_64-buildonly-randconfig-004-20251125 | |-- block-bfq-wf2q.o:warning:objtool:missing-symbol-for-section-.text | |-- block-blk-lib.o:warning:objtool:missing-symbol-for-section-.text | |-- block-blk-mq-debugfs-zoned.o:warning:objtool:missing-symbol-for-section-.text | |-- block-blk-mq-pci.o:warning:objtool:missing-symbol-for-section-.text | |-- block-cmdline-parser.o:warning:objtool:missing-symbol-for-section-.text | |-- crypto-sm4_generic.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-infiniband-hw-usnic-usnic_ib_qp_grp.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-net-ethernet-huawei-bma-kbox_drv-kbox_dump.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-net-ethernet-huawei-bma-kbox_drv-kbox_panic.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-net-ethernet-huawei-bma-kbox_drv-kbox_ram_image.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-net-ethernet-huawei-bma-kbox_drv-kbox_ram_op.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-net-ethernet-mellanox-mlx5-core-en_dim.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-net-wireless-intel-iwlwifi-fw-acpi.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-net-wireless-intel-iwlwifi-fw-notif-wait.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-net-wireless-intel-iwlwifi-fw-smem.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-net-wireless-intel-iwlwifi-iwl-nvm-parse.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-net-wireless-intel-iwlwifi-mvm-nvm.o:warning:objtool:missing-symbol-for-section-.text | |-- kernel-sched-core.c:error:use-of-undeclared-identifier-root_task_group | |-- mm-hugetlb.c:warning:no-previous-prototype-for-function-free_huge_page_to_dhugetlb_pool | `-- mm-rmap.c:warning:variable-cstart-set-but-not-used |-- x86_64-randconfig-002-20251125 | |-- mm-rmap.c:warning:variable-cstart-set-but-not-used | `-- mm-vmscan.c:error:implicit-declaration-of-function-kernel_swap_enabled-Werror-Wimplicit-function-declaration |-- x86_64-randconfig-003-20251125 | |-- mm-hugetlb.c:warning:no-previous-prototype-for-function-free_huge_page_to_dhugetlb_pool | |-- mm-rmap.c:warning:variable-cstart-set-but-not-used | `-- mm-vmscan.c:error:implicit-declaration-of-function-kernel_swap_enabled-Werror-Wimplicit-function-declaration |-- x86_64-randconfig-004-20251125 | |-- mm-hugetlb.c:warning:no-previous-prototype-for-function-free_huge_page_to_dhugetlb_pool | |-- mm-memcontrol.c:warning:bad-line:otherwise. | `-- mm-rmap.c:warning:variable-cstart-set-but-not-used |-- x86_64-randconfig-012-20251125 | |-- fs-ext4-mballoc.o:warning:objtool:ext4_mb_complex_scan_group:unreachable-instruction | |-- mm-hugetlb.c:warning:no-previous-prototype-for-function-free_huge_page_to_dhugetlb_pool | `-- mm-rmap.c:warning:variable-cstart-set-but-not-used |-- x86_64-randconfig-015-20251125 | |-- mm-hugetlb.c:warning:no-previous-prototype-for-function-free_huge_page_to_dhugetlb_pool | |-- mm-rmap.c:warning:variable-cstart-set-but-not-used | `-- mm-vmscan.c:error:implicit-declaration-of-function-kernel_swap_enabled-Werror-Wimplicit-function-declaration |-- x86_64-randconfig-071-20251125 | |-- mm-memcontrol.c:warning:bad-line:otherwise. | `-- mm-rmap.c:warning:variable-cstart-set-but-not-used |-- x86_64-randconfig-072-20251125 | |-- mm-rmap.c:warning:variable-cstart-set-but-not-used | `-- mm-vmscan.c:error:implicit-declaration-of-function-kernel_swap_enabled-Werror-Wimplicit-function-declaration |-- x86_64-randconfig-073-20251125 | |-- mm-memcontrol.c:warning:bad-line:otherwise. | |-- mm-rmap.c:warning:variable-cstart-set-but-not-used | `-- mm-vmscan.c:error:implicit-declaration-of-function-kernel_swap_enabled-Werror-Wimplicit-function-declaration |-- x86_64-randconfig-074-20251125 | |-- mm-hugetlb.c:warning:no-previous-prototype-for-function-free_huge_page_to_dhugetlb_pool | `-- mm-rmap.c:warning:variable-cstart-set-but-not-used |-- x86_64-randconfig-104-20251125 | |-- arch-x86-events-zhaoxin-uncore.c:opportunity-for-str_enabled_disabled(uncore_enabled) | `-- mm-rmap.c:warning:variable-cstart-set-but-not-used |-- x86_64-randconfig-121-20251125 | |-- include-linux-backing-dev.h:sparse:sparse:incompatible-types-in-comparison-expression-(different-address-spaces): | |-- mm-hugetlb.c:warning:no-previous-prototype-for-function-free_huge_page_to_dhugetlb_pool | |-- mm-memcontrol.c:warning:bad-line:otherwise. | |-- mm-rmap.c:warning:variable-cstart-set-but-not-used | `-- mm-vmscan.c:error:implicit-declaration-of-function-kernel_swap_enabled-Werror-Wimplicit-function-declaration `-- x86_64-randconfig-122-20251125 |-- include-linux-backing-dev.h:sparse:sparse:incompatible-types-in-comparison-expression-(different-address-spaces): |-- mm-memcontrol.c:warning:bad-line:otherwise. |-- mm-rmap.c:warning:variable-cstart-set-but-not-used `-- mm-vmscan.c:error:implicit-declaration-of-function-kernel_swap_enabled-Werror-Wimplicit-function-declaration elapsed time: 1558m configs tested: 32 configs skipped: 105 tested configs: arm64 allnoconfig gcc-15.1.0 arm64 defconfig gcc-15.1.0 arm64 randconfig-001-20251125 gcc-11.5.0 arm64 randconfig-002-20251125 gcc-13.4.0 arm64 randconfig-003-20251125 gcc-8.5.0 arm64 randconfig-004-20251125 gcc-11.5.0 x86_64 allnoconfig clang-22 x86_64 buildonly-randconfig-001-20251125 gcc-12 x86_64 buildonly-randconfig-002-20251125 gcc-14 x86_64 buildonly-randconfig-003-20251125 gcc-14 x86_64 buildonly-randconfig-004-20251125 clang-22 x86_64 buildonly-randconfig-005-20251125 gcc-14 x86_64 buildonly-randconfig-006-20251125 gcc-14 x86_64 defconfig gcc-14 x86_64 randconfig-001-20251125 clang-22 x86_64 randconfig-002-20251125 clang-22 x86_64 randconfig-003-20251125 clang-22 x86_64 randconfig-004-20251125 clang-22 x86_64 randconfig-005-20251125 clang-22 x86_64 randconfig-006-20251125 clang-22 x86_64 randconfig-011-20251125 gcc-12 x86_64 randconfig-012-20251125 clang-22 x86_64 randconfig-013-20251125 gcc-14 x86_64 randconfig-014-20251125 gcc-14 x86_64 randconfig-015-20251125 clang-22 x86_64 randconfig-016-20251125 gcc-14 x86_64 randconfig-071-20251125 clang-22 x86_64 randconfig-072-20251125 clang-22 x86_64 randconfig-073-20251125 clang-22 x86_64 randconfig-074-20251125 clang-22 x86_64 randconfig-075-20251125 gcc-14 x86_64 randconfig-076-20251125 clang-22 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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[openeuler:OLK-6.6 3316/3316] kernel/xsched/cfs.c:22:6: warning: no previous prototype for 'xs_rq_add'
by kernel test robot 25 Nov '25

25 Nov '25

tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: 0fa9557473e665984ed5e97515969035324b2ec5 commit: 024b851138509252da4531dc2e69b1e8df50fd3b [3316/3316] xsched: Add xsched CFS class config: x86_64-buildonly-randconfig-002-20251125 (https://download.01.org/0day-ci/archive/20251125/202511252147.paqMgpCw-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/20251125/202511252147.paqMgpCw-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/202511252147.paqMgpCw-lkp@intel.com/ All warnings (new ones prefixed by >>): >> kernel/xsched/cfs.c:22:6: warning: no previous prototype for 'xs_rq_add' [-Wmissing-prototypes] 22 | void xs_rq_add(struct xsched_entity_cfs *xse) | ^~~~~~~~~ >> kernel/xsched/cfs.c:45:6: warning: no previous prototype for 'xs_rq_remove' [-Wmissing-prototypes] 45 | void xs_rq_remove(struct xsched_entity_cfs *xse) | ^~~~~~~~~~~~ >> kernel/xsched/cfs.c:159:6: warning: no previous prototype for 'rq_init_fair' [-Wmissing-prototypes] 159 | void rq_init_fair(struct xsched_cu *xcu) | ^~~~~~~~~~~~ >> kernel/xsched/cfs.c:164:6: warning: no previous prototype for 'xse_init_fair' [-Wmissing-prototypes] 164 | void xse_init_fair(struct xsched_entity *xse) | ^~~~~~~~~~~~~ >> kernel/xsched/cfs.c:169:6: warning: no previous prototype for 'xse_deinit_fair' [-Wmissing-prototypes] 169 | void xse_deinit_fair(struct xsched_entity *xse) | ^~~~~~~~~~~~~~~ -- >> kernel/xsched/cfs.c:56: warning: Function parameter or member 'xse_cfs' not described in 'xs_cfs_rq_update' >> kernel/xsched/cfs.c:56: warning: Function parameter or member 'new_xrt' not described in 'xs_cfs_rq_update' vim +/xs_rq_add +22 kernel/xsched/cfs.c 18 19 #define CFS_INNER_RQ_EMPTY(cfs_xse) \ 20 ((cfs_xse)->xruntime == XSCHED_TIME_INF) 21 > 22 void xs_rq_add(struct xsched_entity_cfs *xse) 23 { 24 struct xsched_rq_cfs *cfs_rq = xse->cfs_rq; 25 struct rb_node **link = &cfs_rq->ctx_timeline.rb_root.rb_node; 26 struct rb_node *parent = NULL; 27 struct xsched_entity_cfs *entry; 28 bool leftmost = true; 29 30 while (*link) { 31 parent = *link; 32 entry = rb_entry(parent, struct xsched_entity_cfs, run_node); 33 if (xse->xruntime <= entry->xruntime) { 34 link = &parent->rb_left; 35 } else { 36 link = &parent->rb_right; 37 leftmost = false; 38 } 39 } 40 41 rb_link_node(&xse->run_node, parent, link); 42 rb_insert_color_cached(&xse->run_node, &cfs_rq->ctx_timeline, leftmost); 43 } 44 > 45 void xs_rq_remove(struct xsched_entity_cfs *xse) 46 { 47 struct xsched_rq_cfs *cfs_rq = xse->cfs_rq; 48 49 rb_erase_cached(&xse->run_node, &cfs_rq->ctx_timeline); 50 } 51 52 /** 53 * xs_cfs_rq_update() - Update entity's runqueue position with new xruntime 54 */ 55 static void xs_cfs_rq_update(struct xsched_entity_cfs *xse_cfs, u64 new_xrt) > 56 { 57 xs_rq_remove(xse_cfs); 58 xse_cfs->xruntime = new_xrt; 59 xs_rq_add(xse_cfs); 60 } 61 62 static inline struct xsched_entity_cfs * 63 xs_pick_first(struct xsched_rq_cfs *cfs_rq) 64 { 65 struct xsched_entity_cfs *xse_cfs; 66 struct rb_node *left = rb_first_cached(&cfs_rq->ctx_timeline); 67 68 if (!left) 69 return NULL; 70 71 xse_cfs = rb_entry(left, struct xsched_entity_cfs, run_node); 72 return xse_cfs; 73 } 74 75 /** 76 * xs_update() - Account xruntime and runtime metrics. 77 * @xse_cfs: Point to CFS scheduling entity. 78 * @delta: Execution time in last period 79 */ 80 static void xs_update(struct xsched_entity_cfs *xse_cfs, u64 delta) 81 { 82 u64 new_xrt = xse_cfs->xruntime + delta * xse_cfs->weight; 83 84 xs_cfs_rq_update(xse_cfs, new_xrt); 85 xse_cfs->sum_exec_runtime += delta; 86 } 87 88 /* 89 * Xsched Fair class methods 90 * For rq manipulation we rely on root runqueue lock already acquired in core. 91 * Access xsched_group_xcu_priv requires no locks because one thread per XCU. 92 */ 93 static void dequeue_ctx_fair(struct xsched_entity *xse) 94 { 95 struct xsched_cu *xcu = xse->xcu; 96 struct xsched_entity_cfs *first; 97 struct xsched_entity_cfs *xse_cfs = &xse->cfs; 98 99 xs_rq_remove(xse_cfs); 100 101 first = xs_pick_first(&xcu->xrq.cfs); 102 xcu->xrq.cfs.min_xruntime = (first) ? first->xruntime : XSCHED_TIME_INF; 103 } 104 105 /** 106 * enqueue_ctx_fair() - Add context to the runqueue 107 * @xse: xsched entity of context 108 * @xcu: executor 109 * 110 * In contrary to enqueue_task it is called once on context init. 111 * Although groups reside in tree, their nodes not counted in nr_running. 112 * The xruntime of a group xsched entitry represented by min xruntime inside. 113 */ 114 static void enqueue_ctx_fair(struct xsched_entity *xse, struct xsched_cu *xcu) 115 { 116 struct xsched_entity_cfs *first; 117 struct xsched_rq_cfs *rq; 118 struct xsched_entity_cfs *xse_cfs = &xse->cfs; 119 120 rq = xse_cfs->cfs_rq = &xcu->xrq.cfs; 121 122 /* If no XSE of only empty groups */ 123 if (xs_pick_first(rq) == NULL || rq->min_xruntime == XSCHED_TIME_INF) 124 rq->min_xruntime = xse_cfs->xruntime; 125 else 126 xse_cfs->xruntime = max(xse_cfs->xruntime, rq->min_xruntime); 127 128 xs_rq_add(xse_cfs); 129 130 first = xs_pick_first(&xcu->xrq.cfs); 131 xcu->xrq.cfs.min_xruntime = (first) ? first->xruntime : XSCHED_TIME_INF; 132 } 133 134 static struct xsched_entity *pick_next_ctx_fair(struct xsched_cu *xcu) 135 { 136 struct xsched_entity_cfs *xse; 137 struct xsched_rq_cfs *rq = &xcu->xrq.cfs; 138 139 xse = xs_pick_first(rq); 140 if (!xse) 141 return NULL; 142 143 return container_of(xse, struct xsched_entity, cfs); 144 } 145 146 static inline bool 147 xs_should_preempt_fair(struct xsched_entity *xse) 148 { 149 return (atomic_read(&xse->submitted_one_kick) >= XSCHED_CFS_KICK_SLICE); 150 } 151 152 static void put_prev_ctx_fair(struct xsched_entity *xse) 153 { 154 struct xsched_entity_cfs *prev = &xse->cfs; 155 156 xs_update(prev, xse->last_exec_runtime); 157 } 158 > 159 void rq_init_fair(struct xsched_cu *xcu) 160 { 161 xcu->xrq.cfs.ctx_timeline = RB_ROOT_CACHED; 162 } 163 > 164 void xse_init_fair(struct xsched_entity *xse) 165 { 166 xse->cfs.weight = XSCHED_CFS_WEIGHT_DFLT; 167 } 168 > 169 void xse_deinit_fair(struct xsched_entity *xse) 170 { 171 /* TODO Cgroup exit */ 172 } 173 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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