[MIPS] unexport null_perf_irq() and make it static

This patch unexports the null_perf_irq() symbol, and simultaneously
makes this function static.

Signed-off-by: Dmitri Vorobiev <dmitri.vorobiev@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 4 insertions, 1 deletions

diff --git a/arch/mips/oprofile/op_model_mipsxx.c b/arch/mips/oprofile/op_model_mipsxx.c
index ca65469d7e30..da8cbb6899dc 100644
--- a/arch/mips/oprofile/op_model_mipsxx.c
+++ b/arch/mips/oprofile/op_model_mipsxx.c
@@ -31,6 +31,8 @@
 
 #define M_COUNTER_OVERFLOW              (1UL      << 31)
 
+static int (*save_perf_irq)(void);
+
 #ifdef CONFIG_MIPS_MT_SMP
 static int cpu_has_mipsmt_pertccounters;
 #define WHAT            (M_TC_EN_VPE | \
@@ -369,6 +371,7 @@ static int __init mipsxx_init(void)
                 return -ENODEV;
         }
 
+        save_perf_irq = perf_irq;
         perf_irq = mipsxx_perfcount_handler;
 
         return 0;
@@ -381,7 +384,7 @@ static void mipsxx_exit(void)
         counters = counters_per_cpu_to_total(counters);
         on_each_cpu(reset_counters, (void *)counters, 0, 1);
 
-        perf_irq = null_perf_irq;
+        perf_irq = save_perf_irq;
 }
 
 struct op_mips_model op_model_mipsxx_ops = {