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| author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2007-06-02 15:36:37 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2007-06-02 21:31:49 +0100 |
| commit | f72267c30f5a08f9a77c97417ec120e6943195f8 (patch) | |
| tree | 72516867e90329c97bb549d7cc26f06ef01b03e6 /arch/arm/oprofile | |
| parent | 29c349d22ccda5678a7dfb732093dbd3befcefa3 (diff) | |
| download | linux-stable-f72267c30f5a08f9a77c97417ec120e6943195f8.tar.gz linux-stable-f72267c30f5a08f9a77c97417ec120e6943195f8.tar.bz2 linux-stable-f72267c30f5a08f9a77c97417ec120e6943195f8.zip | |
[ARM] Solve buggy smp_processor_id() usage
BUG: using smp_processor_id() in preemptible [00000001] code: opcontrol/427
Resolve this bug by ensuring that we're not using smp_processor_id() in
a preemptable context (by disabling preemption.)
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/oprofile')
| -rw-r--r-- | arch/arm/oprofile/op_model_mpcore.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm/oprofile/op_model_mpcore.c b/arch/arm/oprofile/op_model_mpcore.c index 7791da791f5f..75bae067922d 100644 --- a/arch/arm/oprofile/op_model_mpcore.c +++ b/arch/arm/oprofile/op_model_mpcore.c @@ -200,8 +200,10 @@ static int em_call_function(int (*fn)(void)) data.fn = fn; data.ret = 0; + preempt_disable(); smp_call_function(em_func, &data, 1, 1); em_func(&data); + preempt_enable(); return data.ret; } |