The patch titled
Subject: fix for sem_lock
has been added to the -mm tree. Its filename is
ipcsem-fine-grained-locking-for-semtimedop-fix.patch
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------------------------------------------------------
From: Rik van Riel <riel@xxxxxxxxxxx>
Subject: fix for sem_lock
Fix a typo in sem_lock. Of course we need to unlock the local
semaphore lock before jumping to lock_all, in the rare case that
somebody started a complex operation while we were spinning on
the spinlock.
Can be folded into patch 7/7 before merging
Signed-off-by: Rik van Riel <riel@xxxxxxxxxx>
Reported-by: Michel Lespinasse <walken@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
ipc/sem.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN ipc/sem.c~ipcsem-fine-grained-locking-for-semtimedop-fix ipc/sem.c
--- a/ipc/sem.c~ipcsem-fine-grained-locking-for-semtimedop-fix
+++ a/ipc/sem.c
@@ -216,7 +216,7 @@ static inline int sem_lock(struct sem_ar
* we may need to look at things we did not lock here.
*/
if (unlikely(sma->complex_count)) {
- spin_unlock(&sma->sem_perm.lock);
+ spin_unlock(&sem->lock);
goto lock_all;
}
locknum = sops->sem_num;
_
Patches currently in -mm which might be from riel@xxxxxxxxxxx are
ipcsem-open-code-and-rename-sem_lock.patch
ipcsem-open-code-and-rename-sem_lock-fix.patch
ipcsem-have-only-one-list-in-struct-sem_queue.patch
ipcsem-fine-grained-locking-for-semtimedop.patch
ipcsem-fine-grained-locking-for-semtimedop-fix.patch
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