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
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days
------------------------------------------------------
From: Uros Bizjak <ubizjak@xxxxxxxxx>
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@xxxxxxxxx
Signed-off-by: Uros Bizjak <ubizjak@xxxxxxxxx>
Cc: Sumit Semwal <sumit.semwal@xxxxxxxxxx>
Cc: "Christian König" <christian.koenig@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
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@xxxxxxxxx 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
