The patch titled
arch/sh/mm: eliminate a double lock
has been added to the -mm tree. Its filename is
arch-sh-mm-eliminate-a-double-lock.patch
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------------------------------------------------------
Subject: arch/sh/mm: eliminate a double lock
From: Julia Lawall <julia@xxxxxxx>
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@xxxxxxx>
Acked-by: Matt Fleming <matt@xxxxxxxxxxxxxxxxx>
Cc: Paul Mundt <lethal@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/sh/mm/pmb.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN arch/sh/mm/pmb.c~arch-sh-mm-eliminate-a-double-lock arch/sh/mm/pmb.c
--- a/arch/sh/mm/pmb.c~arch-sh-mm-eliminate-a-double-lock
+++ a/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
_
Patches currently in -mm which might be from julia@xxxxxxx are
linux-next.patch
drivers-hid-eliminate-a-double-lock.patch
arch-sh-mm-eliminate-a-double-lock.patch
fs-btrfs-use-memdup_user.patch
fs-btrfs-use-err_cast.patch
drivers-dma-eliminate-a-null-pointer-dereference.patch
drivers-media-use-memdup_user.patch
drivers-media-video-pvrusb2-add-missing-mutex_unlock.patch
drivers-video-omap2-displays-add-missing-mutex_unlock.patch
drivers-s390-net-use-memdup_user.patch
drivers-scsi-libsas-use-sam_good.patch
drivers-scsi-remove-unnecessary-null-test.patch
drivers-message-move-dereference-after-null-test.patch
drivers-scsi-correct-the-size-argument-to-kmalloc.patch
drivers-scsi-use-memdup_user.patch
drivers-block-use-memdup_user.patch
arch-sparc-kernel-eliminate-what-looks-like-a-null-pointer-dereference.patch
mm-use-memdup_user.patch
mm-use-err_cast.patch
drivers-message-i2o-exec-osmc-add-missing-mutex_unlock.patch
drivers-char-n_gsmc-add-missing-spin_unlock_irqrestore.patch
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