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[S390] arch/s390/kernel: Add missing unlock 

In the default case the lock is not unlocked.  The return is
converted to a goto, to share the unlock at the end of the function.

A simplified version of the semantic patch that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@r exists@
expression E1;
identifier f;
@@

f (...) { <+...
* spin_lock_irq (E1,...);
... when != E1
* return ...;
...+> }
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Julia Lawall 2010-04-09 13:42:58 +02:00 committed by Martin Schwidefsky
parent d620a7cf05
commit d7015c120e
1 changed files with 2 additions and 1 deletions
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3
arch/s390/kernel/topology.c
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@ -165,10 +165,11 @@ static void tl_to_cores(struct tl_info *info)
default: default:
clear_cores(); clear_cores();
machine_has_topology = 0; machine_has_topology = 0;
return; goto out;
} }
tle = next_tle(tle); tle = next_tle(tle);
} }
out:
spin_unlock_irq(&topology_lock); spin_unlock_irq(&topology_lock);
} }