This is a note to let you know that I've just added the patch titled
s390/bitops: fix find_next_bit_left
to the 3.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
s390-bitops-fix-find_next_bit_left.patch
and it can be found in the queue-3.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 3b0040a47ad63f7147e9e7d2febb61a3b564bb90 Mon Sep 17 00:00:00 2001
From: Martin Schwidefsky <[email protected]>
Date: Thu, 25 Jul 2013 10:18:17 +0200
Subject: s390/bitops: fix find_next_bit_left
From: Martin Schwidefsky <[email protected]>
commit 3b0040a47ad63f7147e9e7d2febb61a3b564bb90 upstream.
The find_next_bit_left function is broken if used with an offset which
is not a multiple of 64. The shift to mask the bits of a 64-bit word
not to search is in the wrong direction, the result can be either a
bit found smaller than the offset or failure to find a set bit.
Signed-off-by: Martin Schwidefsky <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
arch/s390/include/asm/bitops.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/s390/include/asm/bitops.h
+++ b/arch/s390/include/asm/bitops.h
@@ -693,7 +693,7 @@ static inline int find_next_bit_left(con
size -= offset;
p = addr + offset / BITS_PER_LONG;
if (bit) {
- set = __flo_word(0, *p & (~0UL << bit));
+ set = __flo_word(0, *p & (~0UL >> bit));
if (set >= size)
return size + offset;
if (set < BITS_PER_LONG)
Patches currently in stable-queue which might be from [email protected] are
queue-3.10/s390-bitops-fix-find_next_bit_left.patch
queue-3.10/s390-add-support-for-ibm-zbc12-machine.patch
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