MIPS: Loongson: Remove pointless sample_lock from oprofile code.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/oprofile/op_model_loongson2.c b/arch/mips/oprofile/op_model_loongson2.c
index f7f9a32..29e2326 100644
--- a/arch/mips/oprofile/op_model_loongson2.c
+++ b/arch/mips/oprofile/op_model_loongson2.c
@@ -47,8 +47,6 @@
int cnt1_enabled, cnt2_enabled;
} reg;
-static DEFINE_SPINLOCK(sample_lock);
-
static char *oprofid = "LoongsonPerf";
static irqreturn_t loongson2_perfcount_handler(int irq, void *dev_id);
/* Compute all of the registers in preparation for enabling profiling. */
@@ -115,7 +113,6 @@
uint64_t counter, counter1, counter2;
struct pt_regs *regs = get_irq_regs();
int enabled;
- unsigned long flags;
/*
* LOONGSON2 defines two 32-bit performance counters.
@@ -136,8 +133,6 @@
counter1 = counter & 0xffffffff;
counter2 = counter >> 32;
- spin_lock_irqsave(&sample_lock, flags);
-
if (counter1 & LOONGSON2_PERFCNT_OVERFLOW) {
if (reg.cnt1_enabled)
oprofile_add_sample(regs, 0);
@@ -149,8 +144,6 @@
counter2 = reg.reset_counter2;
}
- spin_unlock_irqrestore(&sample_lock, flags);
-
write_c0_perfcnt((counter2 << 32) | counter1);
return IRQ_HANDLED;