Hi, kernel test robot noticed the following build warnings:
[auto build test WARNING on jic23-iio/togreg] [also build test WARNING on char-misc/char-misc-testing char-misc/char-misc-next char-misc/char-misc-linus usb/usb-testing usb/usb-next usb/usb-linus xen-tip/linux-next linus/master v6.15-rc4] [cannot apply to tegra/for-next drm-xe/drm-xe-next rmk-arm/drm-armada-devel rmk-arm/drm-armada-fixes next-20250430] [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/oushixiong1025-163-com/drm-prime-Support-importing-DMA-BUF-without-sg_table/20250430-170136 base: https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git togreg patch link: https://lore.kernel.org/r/20250430085658.540746-2-oushixiong1025%40163.com patch subject: [PATCH 2/3] drm/prime: Support importing DMA-BUF without sg_table config: arm64-randconfig-003-20250501 (https://download.01.org/0day-ci/archive/20250501/202505011655.qtmh4ua7-...@intel.com/config) compiler: clang version 21.0.0git (https://github.com/llvm/llvm-project f819f46284f2a79790038e1f6649172789734ae8) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250501/202505011655.qtmh4ua7-...@intel.com/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 <l...@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202505011655.qtmh4ua7-...@intel.com/ All warnings (new ones prefixed by >>): >> drivers/gpu/drm/drm_prime.c:925:24: warning: no previous prototype for >> function 'drm_gem_prime_import_dev_skip_map' [-Wmissing-prototypes] 925 | struct drm_gem_object *drm_gem_prime_import_dev_skip_map(struct drm_device *dev, | ^ drivers/gpu/drm/drm_prime.c:925:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 925 | struct drm_gem_object *drm_gem_prime_import_dev_skip_map(struct drm_device *dev, | ^ | static 1 warning generated. vim +/drm_gem_prime_import_dev_skip_map +925 drivers/gpu/drm/drm_prime.c 913 914 /** 915 * drm_gem_prime_import_dev_skip_map - core implementation of the import callback 916 * @dev: drm_device to import into 917 * @dma_buf: dma-buf object to import 918 * @attach_dev: struct device to dma_buf attach 919 * 920 * This function exports a dma-buf without get it's scatter/gather table. 921 * 922 * Drivers who need to get an scatter/gather table for objects need to call 923 * drm_gem_prime_import_dev() instead. 924 */ > 925 struct drm_gem_object *drm_gem_prime_import_dev_skip_map(struct > drm_device *dev, 926 struct dma_buf *dma_buf, 927 struct device *attach_dev) 928 { 929 struct dma_buf_attachment *attach; 930 struct drm_gem_object *obj; 931 int ret; 932 933 if (dma_buf->ops == &drm_gem_prime_dmabuf_ops) { 934 obj = dma_buf->priv; 935 if (obj->dev == dev) { 936 /* 937 * Importing dmabuf exported from our own gem increases 938 * refcount on gem itself instead of f_count of dmabuf. 939 */ 940 drm_gem_object_get(obj); 941 return obj; 942 } 943 } 944 945 attach = dma_buf_attach(dma_buf, attach_dev, true); 946 if (IS_ERR(attach)) 947 return ERR_CAST(attach); 948 949 get_dma_buf(dma_buf); 950 951 obj = dev->driver->gem_prime_import_attachment(dev, attach); 952 if (IS_ERR(obj)) { 953 ret = PTR_ERR(obj); 954 goto fail_detach; 955 } 956 957 obj->import_attach = attach; 958 obj->resv = dma_buf->resv; 959 960 return obj; 961 962 fail_detach: 963 dma_buf_detach(dma_buf, attach); 964 dma_buf_put(dma_buf); 965 966 return ERR_PTR(ret); 967 } 968 EXPORT_SYMBOL(drm_gem_prime_import_dev_skip_map); 969 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
