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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: Uros Bizjak <ubizjak@gmail.com>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: "Christian König" <christian.koenig@amd.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

authored by

Uros Bizjak and committed by
Andrew Morton 777620b8 82e33f24

+1 -1
+1 -1
drivers/dma-buf/dma-buf.c
··· 558 558 * Override ->i_ino with the unique and dmabuffs specific 559 559 * value. 560 560 */ 561 - inode->i_ino = atomic64_add_return(1, &dmabuf_inode); 561 + inode->i_ino = atomic64_inc_return(&dmabuf_inode); 562 562 flags &= O_ACCMODE | O_NONBLOCK; 563 563 file = alloc_file_pseudo(inode, dma_buf_mnt, "dmabuf", 564 564 flags, &dma_buf_fops);