Hi Huan,

kernel test robot noticed the following build warnings:

[auto build test WARNING on 931a3b3bccc96e7708c82b30b2b5fa82dfd04890]

url: https://github.com/intel-lab-lkp/linux/commits/Huan-Yang/dma-buf-heaps-Intro... base: 931a3b3bccc96e7708c82b30b2b5fa82dfd04890 patch link: https://lore.kernel.org/r/20240730075755.10941-2-link%40vivo.com patch subject: [PATCH v2 1/5] dma-buf: heaps: Introduce DMA_HEAP_ALLOC_AND_READ_FILE heap flag config: xtensa-allyesconfig (https://download.01.org/0day-ci/archive/20240731/202407311822.ZneNMq5I-lkp@i...) compiler: xtensa-linux-gcc (GCC) 14.1.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240731/202407311822.ZneNMq5I-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/202407311822.ZneNMq5I-lkp@intel.com/

All warnings (new ones prefixed by >>):

drivers/dma-buf/dma-heap.c:44: warning: Function parameter or struct member 'priv' not described in 'dma_heap' drivers/dma-buf/dma-heap.c:44: warning: Function parameter or struct member 'heap_devt' not described in 'dma_heap' drivers/dma-buf/dma-heap.c:44: warning: Function parameter or struct member 'list' not described in 'dma_heap' drivers/dma-buf/dma-heap.c:44: warning: Function parameter or struct member 'heap_cdev' not described in 'dma_heap'

...

drivers/dma-buf/dma-heap.c:104: warning: expecting prototype for Trigger sync file read, read into dma(). Prototype was for dma_heap_read_file_sync() instead

vim +104 drivers/dma-buf/dma-heap.c

86 87 /** 88 * Trigger sync file read, read into dma-buf. 89 * 90 * @dmabuf: which we done alloced and export. 91 * @heap_file: file info wrapper to read from. 92 * 93 * Whether to use buffer I/O or direct I/O depends on the mode when the 94 * file is opened. 95 * Remember, if use direct I/O, file must be page aligned. 96 * Since the buffer used for file reading is provided by dma-buf, when 97 * using direct I/O, the file content will be directly filled into 98 * dma-buf without the need for additional CPU copying. 99 * 100 * 0 on success, negative if anything wrong. 101 */ 102 static int dma_heap_read_file_sync(struct dma_buf *dmabuf, 103 struct dma_heap_file *heap_file)

104 {

105 struct iosys_map map; 106 ssize_t bytes; 107 int ret; 108 109 ret = dma_buf_vmap(dmabuf, &map); 110 if (ret) 111 return ret; 112 113 /** 114 * The kernel_read_file function can handle file reading effectively, 115 * and if the return value does not match the file size, 116 * then it indicates an error. 117 */ 118 bytes = kernel_read_file(heap_file->file, 0, &map.vaddr, dmabuf->size, 119 &heap_file->fsize, READING_POLICY); 120 if (bytes != heap_file->fsize) 121 ret = -EIO; 122 123 dma_buf_vunmap(dmabuf, &map); 124 125 return ret; 126 } 127