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| author | Andrea Parri <andrea.parri@amarulasolutions.com> | 2019-04-16 15:17:11 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-05-16 20:35:34 +0300 |
| commit | 777d3fa587fba8d89976816dc9cc8c2516263bc5 (patch) | |
| tree | e792c56491ea687d54def918f654f17bc1867e6f /fs | |
| parent | 7b2c4e6de652044cc655edaa911e2169f4e9a063 (diff) | |
| download | linux-777d3fa587fba8d89976816dc9cc8c2516263bc5.tar.xz | |
kernfs: fix barrier usage in __kernfs_new_node()
commit 998267900cee901c5d1dfa029a6304d00acbc29f upstream.
smp_mb__before_atomic() can not be applied to atomic_set(). Remove the
barrier and rely on RELEASE synchronization.
Fixes: ba16b2846a8c6 ("kernfs: add an API to get kernfs node from inode number")
Cc: stable@vger.kernel.org
Signed-off-by: Andrea Parri <andrea.parri@amarulasolutions.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/kernfs/dir.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/fs/kernfs/dir.c b/fs/kernfs/dir.c index b84d635567d3..1e7a74b8e064 100644 --- a/fs/kernfs/dir.c +++ b/fs/kernfs/dir.c @@ -650,11 +650,10 @@ static struct kernfs_node *__kernfs_new_node(struct kernfs_root *root, kn->id.generation = gen; /* - * set ino first. This barrier is paired with atomic_inc_not_zero in + * set ino first. This RELEASE is paired with atomic_inc_not_zero in * kernfs_find_and_get_node_by_ino */ - smp_mb__before_atomic(); - atomic_set(&kn->count, 1); + atomic_set_release(&kn->count, 1); atomic_set(&kn->active, KN_DEACTIVATED_BIAS); RB_CLEAR_NODE(&kn->rb); |