+ dma-buf-use-atomic64_inc_return-in-dma_buf_getfile.patch added to mm-nonmm-unstable branch

+ dma-buf-use-atomic64_inc_return-in-dma_buf_getfile.patch added to mm-nonmm-unstable branch

[Andrew Morton]

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The patch titled
     Subject: dma-buf: use atomic64_inc_return() in dma_buf_getfile()
has been added to the -mm mm-nonmm-unstable branch.  Its filename is
     dma-buf-use-atomic64_inc_return-in-dma_buf_getfile.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/dma-buf-use-atomic64_inc_return-in-dma_buf_getfile.patch

This patch will later appear in the mm-nonmm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Uros Bizjak <ubizjak@gmail.com>
Subject: dma-buf: use atomic64_inc_return() in dma_buf_getfile()
Date: Mon, 7 Oct 2024 10:37:52 +0200

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>
---

 drivers/dma-buf/dma-buf.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/dma-buf/dma-buf.c~dma-buf-use-atomic64_inc_return-in-dma_buf_getfile
+++ a/drivers/dma-buf/dma-buf.c
@@ -558,7 +558,7 @@ static struct file *dma_buf_getfile(size
 	 * 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);
_

Patches currently in -mm which might be from ubizjak@gmail.com are

perf-hw_breakpoint-use-err_ptr_pcpu-is_err_pcpu-and-ptr_err_pcpu-macros.patch
percpu-merge-verify_percpu_ptr-into-its-only-user.patch
percpu-introduce-percpu_ptr-macro.patch
percpu-cast-percpu-pointer-in-percpu_ptr-via-unsigned-long.patch
dma-buf-use-atomic64_inc_return-in-dma_buf_getfile.patch