Commit 777620b8 authored by Uros Bizjak's avatar Uros Bizjak Committed by Andrew Morton
Browse files

dma-buf: use atomic64_inc_return() in dma_buf_getfile() 

Use atomic64_inc_return(&ref) instead of atomic64_add_return(1, &ref) to
use optimized implementation and ease register pressure around the
primitive for targets that implement optimized variant.

Link: https://lkml.kernel.org/r/20241007083921.47525-1-ubizjak@gmail.com


Signed-off-by: default avatarUros Bizjak <ubizjak@gmail.com>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: "Christian König" <christian.koenig@amd.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 82e33f24

drivers/dma-buf/dma-buf.c

+1 −1
Original line number Diff line number Diff line
@@ -558,7 +558,7 @@ static struct file *dma_buf_getfile(size_t size, int flags) 
	 * Override ->i_ino with the unique and dmabuffs specific

	 * value.

	 */

	inode->i_ino = atomic64_add_return(1, &dmabuf_inode);

	inode->i_ino = atomic64_inc_return(&dmabuf_inode);

	flags &= O_ACCMODE | O_NONBLOCK;

	file = alloc_file_pseudo(inode, dma_buf_mnt, "dmabuf",

				 flags, &dma_buf_fops);