Subject: + ipc-sem-separate-wait-for-zero-and-alter-tasks-into-seperate-queues-fix.patch added to -mm tree
To: manfred@xxxxxxxxxxxxxxxx,davidlohr.bueso@xxxxxx,riel@xxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Tue, 18 Jun 2013 14:05:26 -0700
The patch titled
Subject: ipc/sem.c: scan complex wait-for-zero after undefined updates
has been added to the -mm tree. Its filename is
ipc-sem-separate-wait-for-zero-and-alter-tasks-into-seperate-queues-fix.patch
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From: Manfred Spraul <manfred@xxxxxxxxxxxxxxxx>
Subject: ipc/sem.c: scan complex wait-for-zero after undefined updates
After an update of a semaphore array that does not use struct sembuf,
complex wait-for-zero operations were not checked if they are able to
proceed.
Signed-off-by: Manfred Spraul <manfred@xxxxxxxxxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Cc: Davidlohr Bueso <davidlohr.bueso@xxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
ipc/sem.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff -puN ipc/sem.c~ipc-sem-separate-wait-for-zero-and-alter-tasks-into-seperate-queues-fix ipc/sem.c
--- a/ipc/sem.c~ipc-sem-separate-wait-for-zero-and-alter-tasks-into-seperate-queues-fix
+++ a/ipc/sem.c
@@ -726,8 +726,10 @@ static int do_smart_wakeup_zero(struct s
* Assume all were changed.
*/
for (i = 0; i < sma->sem_nsems; i++) {
- if (sma->sem_base[i].semval == 0)
+ if (sma->sem_base[i].semval == 0) {
+ got_zero = 1;
semop_completed |= wake_const_ops(sma, i, pt);
+ }
}
}
/*
_
Patches currently in -mm which might be from manfred@xxxxxxxxxxxxxxxx are
ipc-utilc-ipc_rcu_alloc-cacheline-align-allocation.patch
ipc-utilc-ipc_rcu_alloc-cacheline-align-allocation-checkpatch-fixes.patch
ipc-semc-cacheline-align-the-semaphore-structures.patch
ipc-sem-separate-wait-for-zero-and-alter-tasks-into-seperate-queues.patch
ipc-sem-separate-wait-for-zero-and-alter-tasks-into-seperate-queues-fix.patch
ipc-semc-always-use-only-one-queue-for-alter-operations.patch
ipc-semc-replace-shared-sem_otime-with-per-semaphore-value.patch
ipc-semc-rename-try_atomic_semop-to-perform_atomic_semop-docu-update.patch
slab-leaks3-default-y.patch
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