From 324ecaee46f86c1eaf083fd82eaf997335e70163 Mon Sep 17 00:00:00 2001 From: "Matthew Wilcox (Oracle)" Date: Tue, 16 Apr 2024 04:17:48 +0100 Subject: buffer: fix __bread and __bread_gfp kernel-doc The extra indentation confused the kernel-doc parser, so remove it. Fix some other wording while I'm here, and advise the user they need to call brelse() on this buffer. __bread_gfp() isn't used directly by filesystems, but the other wrappers for it don't have documentation, so document it accordingly. Link: https://lkml.kernel.org/r/20240416031754.4076917-5-willy@infradead.org Co-developed-by: Pankaj Raghav Signed-off-by: Pankaj Raghav Signed-off-by: Matthew Wilcox (Oracle) Tested-by: Randy Dunlap Signed-off-by: Andrew Morton --- include/linux/buffer_head.h | 22 +++++++++++++--------- 1 file changed, 13 insertions(+), 9 deletions(-) (limited to 'include') diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h index d78454a4dd1f..56a1e9c1e71e 100644 --- a/include/linux/buffer_head.h +++ b/include/linux/buffer_head.h @@ -437,17 +437,21 @@ static inline void bh_readahead_batch(int nr, struct buffer_head *bhs[], } /** - * __bread() - reads a specified block and returns the bh - * @bdev: the block_device to read from - * @block: number of block - * @size: size (in bytes) to read + * __bread() - Read a block. + * @bdev: The block device to read from. + * @block: Block number in units of block size. + * @size: The block size of this device in bytes. * - * Reads a specified block, and returns buffer head that contains it. - * The page cache is allocated from movable area so that it can be migrated. - * It returns NULL if the block was unreadable. + * Read a specified block, and return the buffer head that refers + * to it. The memory is allocated from the movable area so that it can + * be migrated. The returned buffer head has its refcount increased. + * The caller should call brelse() when it has finished with the buffer. + * + * Context: May sleep waiting for I/O. + * Return: NULL if the block was unreadable. */ -static inline struct buffer_head * -__bread(struct block_device *bdev, sector_t block, unsigned size) +static inline struct buffer_head *__bread(struct block_device *bdev, + sector_t block, unsigned size) { return __bread_gfp(bdev, block, size, __GFP_MOVABLE); } -- cgit v1.2.3-58-ga151