CC: [email protected] BCC: [email protected] In-Reply-To: <[email protected]> References: <[email protected]> TO: Dmitry Osipenko <[email protected]> TO: David Airlie <[email protected]> TO: Gerd Hoffmann <[email protected]> TO: Gurchetan Singh <[email protected]> TO: "Chia-I Wu" <[email protected]> TO: Daniel Vetter <[email protected]> TO: Daniel Almeida <[email protected]> TO: Gert Wollny <[email protected]> TO: Gustavo Padovan <[email protected]> TO: Daniel Stone <[email protected]> TO: Tomeu Vizoso <[email protected]> TO: Maarten Lankhorst <[email protected]> TO: Maxime Ripard <[email protected]> TO: Thomas Zimmermann <[email protected]> TO: Rob Herring <[email protected]> TO: Steven Price <[email protected]> TO: Alyssa Rosenzweig <[email protected]> TO: Rob Clark <[email protected]> TO: Emil Velikov <[email protected]> TO: Robin Murphy <[email protected]> TO: Qiang Yu <[email protected]> TO: Sumit Semwal <[email protected]> TO: "Christian König" <[email protected]> CC: Dmitry Osipenko <[email protected]> CC: [email protected] CC: [email protected] CC: [email protected]
Hi Dmitry, I love your patch! Perhaps something to improve: [auto build test WARNING on drm/drm-next] [also build test WARNING on next-20220422] [cannot apply to v5.18-rc4] [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] url: https://github.com/intel-lab-lkp/linux/commits/Dmitry-Osipenko/Add-generic-memory-shrinker-to-VirtIO-GPU-and-Panfrost-DRM-drivers/20220425-030800 base: git://anongit.freedesktop.org/drm/drm drm-next :::::: branch date: 25 hours ago :::::: commit date: 25 hours ago compiler: powerpc-linux-gcc (GCC) 11.3.0 reproduce (cppcheck warning): # apt-get install cppcheck git checkout 67a24652cf3a7fa84713818079c6d79b3c8edc88 cppcheck --quiet --enable=style,performance,portability --template=gcc FILE If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <[email protected]> cppcheck possible warnings: (new ones prefixed by >>, may not real problems) >> drivers/gpu/drm/drm_gem_shmem_helper.c:984:29: warning: Boolean result is >> used in bitwise operation. Clarify expression with parentheses. >> [clarifyCondition] WARN_ON_ONCE(!shmem->pages ^ pages_inactive); ^ vim +984 drivers/gpu/drm/drm_gem_shmem_helper.c 2194a63a818db7 Noralf Trønnes 2019-03-12 965 2194a63a818db7 Noralf Trønnes 2019-03-12 966 static vm_fault_t drm_gem_shmem_fault(struct vm_fault *vmf) 2194a63a818db7 Noralf Trønnes 2019-03-12 967 { 2194a63a818db7 Noralf Trønnes 2019-03-12 968 struct vm_area_struct *vma = vmf->vma; 2194a63a818db7 Noralf Trønnes 2019-03-12 969 struct drm_gem_object *obj = vma->vm_private_data; 2194a63a818db7 Noralf Trønnes 2019-03-12 970 struct drm_gem_shmem_object *shmem = to_drm_gem_shmem_obj(obj); 2194a63a818db7 Noralf Trønnes 2019-03-12 971 loff_t num_pages = obj->size >> PAGE_SHIFT; d611b4a0907cec Neil Roberts 2021-02-23 972 vm_fault_t ret; 2194a63a818db7 Noralf Trønnes 2019-03-12 973 struct page *page; 11d5a4745e00e7 Neil Roberts 2021-02-23 974 pgoff_t page_offset; 67a24652cf3a7f Dmitry Osipenko 2022-04-24 975 bool pages_inactive; 67a24652cf3a7f Dmitry Osipenko 2022-04-24 976 int err; 11d5a4745e00e7 Neil Roberts 2021-02-23 977 11d5a4745e00e7 Neil Roberts 2021-02-23 978 /* We don't use vmf->pgoff since that has the fake offset */ 11d5a4745e00e7 Neil Roberts 2021-02-23 979 page_offset = (vmf->address - vma->vm_start) >> PAGE_SHIFT; 2194a63a818db7 Noralf Trønnes 2019-03-12 980 37e84948f9e9ba Dmitry Osipenko 2022-04-24 981 dma_resv_lock(shmem->base.resv, NULL); 2194a63a818db7 Noralf Trønnes 2019-03-12 982 67a24652cf3a7f Dmitry Osipenko 2022-04-24 983 pages_inactive = (shmem->evicted || shmem->madv < 0 || !shmem->pages_use_count); 67a24652cf3a7f Dmitry Osipenko 2022-04-24 @984 WARN_ON_ONCE(!shmem->pages ^ pages_inactive); 67a24652cf3a7f Dmitry Osipenko 2022-04-24 985 67a24652cf3a7f Dmitry Osipenko 2022-04-24 986 if (page_offset >= num_pages || (!shmem->pages && !shmem->evicted)) { d611b4a0907cec Neil Roberts 2021-02-23 987 ret = VM_FAULT_SIGBUS; d611b4a0907cec Neil Roberts 2021-02-23 988 } else { 67a24652cf3a7f Dmitry Osipenko 2022-04-24 989 err = drm_gem_shmem_swap_in_locked(shmem); 67a24652cf3a7f Dmitry Osipenko 2022-04-24 990 if (err) { 67a24652cf3a7f Dmitry Osipenko 2022-04-24 991 ret = VM_FAULT_OOM; 67a24652cf3a7f Dmitry Osipenko 2022-04-24 992 goto unlock; 67a24652cf3a7f Dmitry Osipenko 2022-04-24 993 } 67a24652cf3a7f Dmitry Osipenko 2022-04-24 994 11d5a4745e00e7 Neil Roberts 2021-02-23 995 page = shmem->pages[page_offset]; 2194a63a818db7 Noralf Trønnes 2019-03-12 996 8b93d1d7dbd578 Daniel Vetter 2021-08-12 997 ret = vmf_insert_pfn(vma, vmf->address, page_to_pfn(page)); d611b4a0907cec Neil Roberts 2021-02-23 998 } 67a24652cf3a7f Dmitry Osipenko 2022-04-24 999 unlock: 37e84948f9e9ba Dmitry Osipenko 2022-04-24 1000 dma_resv_unlock(shmem->base.resv); d611b4a0907cec Neil Roberts 2021-02-23 1001 d611b4a0907cec Neil Roberts 2021-02-23 1002 return ret; 2194a63a818db7 Noralf Trønnes 2019-03-12 1003 } 2194a63a818db7 Noralf Trønnes 2019-03-12 1004 -- 0-DAY CI Kernel Test Service https://01.org/lkp _______________________________________________ kbuild mailing list -- [email protected] To unsubscribe send an email to [email protected]
