diff options
| author | Li RongQing <lirongqing@baidu.com> | 2026-06-22 10:08:42 +0100 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2026-07-01 15:26:20 +0200 |
| commit | a58edda50a3ec08e6adac1d04dc3e488494e412d (patch) | |
| tree | 27de1d389ace3990f3981d37209a3d4fcc054628 | |
| parent | cb39654926f8e7a08ecc1dcb3941628855275940 (diff) | |
afs: Remove erroneous seq |= 1 in volume lookup loop
The `seq |= 1` operation in the volume lookup loop is incorrect because:
seq is already incremented at start, making it odd in next iteration
which triggers lock, but The `|= 1` operation causes seq to be even
and unintended lockless operation
Remove this erroneous operation to maintain proper lock sequencing.
Fixes: 32222f09782f ("afs: Apply server breaks to mmap'd files in the call processor")
Signed-off-by: Li RongQing <lirongqing@baidu.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Link: https://patch.msgid.link/20260622090856.2746629-9-dhowells@redhat.com
Reviewed-by: Oleg Nesterov <oleg@redhat.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: linux-afs@lists.infradead.org
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
| -rw-r--r-- | fs/afs/callback.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/fs/afs/callback.c b/fs/afs/callback.c index 894d2bad6b6c..833ac3178ddc 100644 --- a/fs/afs/callback.c +++ b/fs/afs/callback.c @@ -140,7 +140,6 @@ static struct afs_volume *afs_lookup_volume_rcu(struct afs_cell *cell, break; if (!need_seqretry(&cell->volume_lock, seq)) break; - seq |= 1; /* Want a lock next time */ } done_seqretry(&cell->volume_lock, seq); |