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@i...) 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@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@redhat.com> :::::: CC: Dave Airlie <airlied@redhat.com> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki