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authorThomas Gleixner <tglx@linutronix.de>2009-07-25 16:18:34 +0200
committerIngo Molnar <mingo@elte.hu>2011-09-13 11:12:05 +0200
commit2d21a29fb62f142b8a62496700d8d82a6a8fd783 (patch)
tree78d83ed47a72b1e31ecadb3f77e91f865b407b48 /arch/x86/oprofile
parent6b2c1800f1d3a608af952cfbd57f8f1a71c5d9b4 (diff)
locking, oprofile: Annotate oprofilefs lock as raw
The oprofilefs_lock can be taken in atomic context (in profiling interrupts) and therefore cannot cannot be preempted on -rt - annotate it. In mainline this change documents the low level nature of the lock - otherwise there's no functional difference. Lockdep and Sparse checking will work as usual. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/oprofile')
-rw-r--r--arch/x86/oprofile/nmi_int.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/oprofile/nmi_int.c b/arch/x86/oprofile/nmi_int.c
index 68894fdc034..96646b3aeca 100644
--- a/arch/x86/oprofile/nmi_int.c
+++ b/arch/x86/oprofile/nmi_int.c
@@ -355,10 +355,10 @@ static void nmi_cpu_setup(void *dummy)
int cpu = smp_processor_id();
struct op_msrs *msrs = &per_cpu(cpu_msrs, cpu);
nmi_cpu_save_registers(msrs);
- spin_lock(&oprofilefs_lock);
+ raw_spin_lock(&oprofilefs_lock);
model->setup_ctrs(model, msrs);
nmi_cpu_setup_mux(cpu, msrs);
- spin_unlock(&oprofilefs_lock);
+ raw_spin_unlock(&oprofilefs_lock);
per_cpu(saved_lvtpc, cpu) = apic_read(APIC_LVTPC);
apic_write(APIC_LVTPC, APIC_DM_NMI);
}