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vfs: stop counting on gcc not messing with mnt_expiry_mark if not asked

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So happens it already was not doing it, but there is no need to "hope"
as indicated in the comment.

No changes in generated assembly.

Signed-off-by: Mateusz Guzik <mjguzik@gmail.com>
Link: https://lore.kernel.org/r/20231004111916.728135-3-mjguzik@gmail.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Mateusz Guzik 2023-10-04 13:19:16 +02:00 committed by Christian Brauner
parent 95e93d17cb
commit 6c4d1c99d2
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1 changed files with 2 additions and 2 deletions
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4
fs/namespace.c
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@ -1346,9 +1346,9 @@ void mntput(struct vfsmount *mnt)
{
if (mnt) {
struct mount *m = real_mount(mnt);
/* avoid cacheline pingpong, hope gcc doesn't get "smart" */
/* avoid cacheline pingpong */
if (unlikely(m->mnt_expiry_mark))
m->mnt_expiry_mark = 0;
WRITE_ONCE(m->mnt_expiry_mark, 0);
mntput_no_expire(m);
}
}