2.6.5-rc2-mm2 ipc hang fix

[badari <pbadari@us.ibm.com>]

Hi Andrew,

I ran into ipc hang while trying to shutdown database. Problem seems
to be due to missing sem_unlock() in find_undo(). Here is the patch
to fix the problem.

Please apply.

Thanks,
Badari

--- linux/ipc/sem.c     2004-03-26 05:19:22.833959160 -0800
+++ linux.new/ipc/sem.c 2004-03-26 05:19:57.047757872 -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))
+       if (sem_checkid(sma,semid)) {
+               sem_unlock(sma);
                goto out_unlock;
+       }
        nsems = sma->sem_nsems;
        sem_unlock(sma);