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| author | Julia Lawall <julia@diku.dk> | 2010-06-20 11:24:54 +0000 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2010-06-21 13:46:53 +0900 |
| commit | 0e6f989ba83e6fa64e979d3488f01670b8be7959 (patch) | |
| tree | 867fd6607fb419ab3a6250c38ec7e966131c145c /arch/sh | |
| parent | 9973e38575070b70c68bad177fb5056548fea349 (diff) | |
| download | blackbird-op-linux-0e6f989ba83e6fa64e979d3488f01670b8be7959.tar.gz blackbird-op-linux-0e6f989ba83e6fa64e979d3488f01670b8be7959.zip | |
arch/sh/mm: Eliminate a double lock
The function begins and ends with a read_lock. The latter is changed to a
read_unlock.
A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)
// <smpl>
@locked@
expression E1;
position p;
@@
read_lock(E1@p,...);
@r exists@
expression x <= locked.E1;
expression locked.E1;
expression E2;
identifier lock;
position locked.p,p1,p2;
@@
*lock@p1 (E1@p,...);
... when != E1
when != \(x = E2\|&x\)
*lock@p2 (E1,...);
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Acked-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh')
| -rw-r--r-- | arch/sh/mm/pmb.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/sh/mm/pmb.c b/arch/sh/mm/pmb.c index 18623ba751b3..6379091a1647 100644 --- a/arch/sh/mm/pmb.c +++ b/arch/sh/mm/pmb.c @@ -770,7 +770,7 @@ static void __init pmb_resize(void) spin_unlock_irqrestore(&pmbe->lock, flags); } - read_lock(&pmb_rwlock); + read_unlock(&pmb_rwlock); } #endif |
