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| author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2005-07-27 23:00:05 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2005-07-27 23:00:05 +0100 |
| commit | 614d73edae68836f7659ee8efec90878e6215fb1 (patch) | |
| tree | 6a9cde929df6175e797a157ca36df4c5cd99f3ae /arch/arm/lib | |
| parent | 9e566d8bd61f939b7f5d7d969f5b178571471cf9 (diff) | |
| download | blackbird-op-linux-614d73edae68836f7659ee8efec90878e6215fb1.tar.gz blackbird-op-linux-614d73edae68836f7659ee8efec90878e6215fb1.zip | |
[ARM SMP] Fix data corruption in test_* bitops
If we found that the bit was already in the desired state, we
would skip performing the operation, and write random data back.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/lib')
| -rw-r--r-- | arch/arm/lib/bitops.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/arm/lib/bitops.h b/arch/arm/lib/bitops.h index 6976e60e47cb..5382a3023602 100644 --- a/arch/arm/lib/bitops.h +++ b/arch/arm/lib/bitops.h @@ -19,9 +19,9 @@ mov r3, r2, lsl r3 @ create mask 1: ldrexb r2, [r1] ands r0, r2, r3 @ save old value of bit - \instr ip, r2, r3 @ toggle bit - strexb r2, ip, [r1] - cmp r2, #0 + \instr r2, r2, r3 @ toggle bit + strexb ip, r2, [r1] + cmp ip, #0 bne 1b cmp r0, #0 movne r0, #1 |
