Hi Karunika, kernel test robot noticed the following build warnings:
[auto build test WARNING on drm-misc/drm-misc-next] [also build test WARNING on drm/drm-next drm-exynos/exynos-drm-next drm-intel/for-linux-next drm-intel/for-linux-next-fixes drm-tip/drm-tip linus/master v6.18-rc1 next-20251014] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Karunika-Choo/drm-panthor-Factor-out-GPU_ID-register-read-into-separate-function/20251014-174729 base: git://anongit.freedesktop.org/drm/drm-misc drm-misc-next patch link: https://lore.kernel.org/r/20251014094337.1009601-7-karunika.choo%40arm.com patch subject: [PATCH v1 06/10] drm/panthor: Implement L2 power on/off via PWR_CONTROL config: i386-buildonly-randconfig-002-20251015 (https://download.01.org/0day-ci/archive/20251015/[email protected]/config) 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/20251015/[email protected]/reproduce) 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 <[email protected]> | Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/ All warnings (new ones prefixed by >>): In file included from drivers/gpu/drm/panthor/panthor_pwr.c:6: drivers/gpu/drm/panthor/panthor_pwr.c: In function 'panthor_pwr_domain_wait_transition': >> include/linux/bits.h:49:27: warning: right shift count >= width of type >> [-Wshift-count-overflow] 49 | type_max(t) >> (BITS_PER_TYPE(t) - 1 - (h))))) | ^~ include/linux/iopoll.h:145:9: note: in expansion of macro 'poll_timeout_us' 145 | poll_timeout_us((val) = op(args), cond, sleep_us, timeout_us, sleep_before_read) | ^~~~~~~~~~~~~~~ drivers/gpu/drm/panthor/panthor_device.h:533:9: note: in expansion of macro 'read_poll_timeout' 533 | read_poll_timeout(gpu_read64, val, cond, delay_us, timeout_us, false, \ | ^~~~~~~~~~~~~~~~~ drivers/gpu/drm/panthor/panthor_pwr.c:152:15: note: in expansion of macro 'gpu_read64_poll_timeout' 152 | ret = gpu_read64_poll_timeout(ptdev, pwrtrans_reg, val, | ^~~~~~~~~~~~~~~~~~~~~~~ include/linux/bits.h:51:33: note: in expansion of macro 'GENMASK_TYPE' 51 | #define GENMASK(h, l) GENMASK_TYPE(unsigned long, h, l) | ^~~~~~~~~~~~ drivers/gpu/drm/panthor/panthor_pwr.c:26:41: note: in expansion of macro 'GENMASK' 26 | #define PWR_ALL_CORES_MASK GENMASK(63, 0) | ^~~~~~~ drivers/gpu/drm/panthor/panthor_pwr.c:153:41: note: in expansion of macro 'PWR_ALL_CORES_MASK' 153 | !(PWR_ALL_CORES_MASK & val), 100, | ^~~~~~~~~~~~~~~~~~ drivers/gpu/drm/panthor/panthor_pwr.c: In function 'retract_domain': >> include/vdso/bits.h:7:40: warning: left shift count >= width of type >> [-Wshift-count-overflow] 7 | #define BIT(nr) (UL(1) << (nr)) | ^~ include/linux/iopoll.h:49:21: note: in definition of macro 'poll_timeout_us' 49 | if (cond) { \ | ^~~~ drivers/gpu/drm/panthor/panthor_device.h:533:9: note: in expansion of macro 'read_poll_timeout' 533 | read_poll_timeout(gpu_read64, val, cond, delay_us, timeout_us, false, \ | ^~~~~~~~~~~~~~~~~ drivers/gpu/drm/panthor/panthor_pwr.c:259:15: note: in expansion of macro 'gpu_read64_poll_timeout' 259 | ret = gpu_read64_poll_timeout(ptdev, PWR_STATUS, val, | ^~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/panthor/panthor_regs.h:249:57: note: in expansion of macro 'BIT' 249 | #define PWR_STATUS_RETRACT_PENDING BIT(43) | ^~~ drivers/gpu/drm/panthor/panthor_pwr.c:260:41: note: in expansion of macro 'PWR_STATUS_RETRACT_PENDING' 260 | !(PWR_STATUS_RETRACT_PENDING & val), 0, | ^~~~~~~~~~~~~~~~~~~~~~~~~~ vim +49 include/linux/bits.h 31299a5e021124 Vincent Mailhol 2025-03-26 35 19408200c09485 Vincent Mailhol 2025-03-26 36 /* 19408200c09485 Vincent Mailhol 2025-03-26 37 * Generate a mask for the specified type @t. Additional checks are made to 19408200c09485 Vincent Mailhol 2025-03-26 38 * guarantee the value returned fits in that type, relying on 19408200c09485 Vincent Mailhol 2025-03-26 39 * -Wshift-count-overflow compiler check to detect incompatible arguments. 19408200c09485 Vincent Mailhol 2025-03-26 40 * For example, all these create build errors or warnings: 19408200c09485 Vincent Mailhol 2025-03-26 41 * 19408200c09485 Vincent Mailhol 2025-03-26 42 * - GENMASK(15, 20): wrong argument order 19408200c09485 Vincent Mailhol 2025-03-26 43 * - GENMASK(72, 15): doesn't fit unsigned long 19408200c09485 Vincent Mailhol 2025-03-26 44 * - GENMASK_U32(33, 15): doesn't fit in a u32 19408200c09485 Vincent Mailhol 2025-03-26 45 */ 19408200c09485 Vincent Mailhol 2025-03-26 46 #define GENMASK_TYPE(t, h, l) \ 19408200c09485 Vincent Mailhol 2025-03-26 47 ((t)(GENMASK_INPUT_CHECK(h, l) + \ 19408200c09485 Vincent Mailhol 2025-03-26 48 (type_max(t) << (l) & \ 19408200c09485 Vincent Mailhol 2025-03-26 @49 type_max(t) >> (BITS_PER_TYPE(t) - 1 - (h))))) 19408200c09485 Vincent Mailhol 2025-03-26 50 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
