From: badari <pbadari@us.ibm.com>
I ran into an ipc hang while trying to shutdown a database. The problem is
due to missing sem_unlock() in find_undo().
---
25-akpm/ipc/sem.c | 7 ++++---
1 files changed, 4 insertions(+), 3 deletions(-)
diff -puN ipc/sem.c~ipc-locking-fix ipc/sem.c
--- 25/ipc/sem.c~ipc-locking-fix 2004-03-26 09:58:54.761953600 -0800
+++ 25-akpm/ipc/sem.c 2004-03-26 09:58:54.764953144 -0800
@@ -972,8 +972,10 @@ static struct sem_undo *find_undo(int se
if(sma==NULL)
goto out;
un = ERR_PTR(-EIDRM);
- if (sem_checkid(sma,semid))
- goto out_unlock;
+ if (sem_checkid(sma,semid)) {
+ sem_unlock(sma);
+ goto out;
+ }
nsems = sma->sem_nsems;
sem_unlock(sma);
@@ -1004,7 +1006,6 @@ static struct sem_undo *find_undo(int se
sma->undo = new;
sem_unlock(sma);
un = new;
-out_unlock:
unlock_semundo();
out:
return un;
_