this_cpu: Use this_cpu_xx in nmi handling

this_cpu_inc/dec reduces the number of instructions needed.

Signed-off-by: Christoph Lameter <cl@linux-foundation.org>
Signed-off-by: Tejun Heo <tj@kernel.org>

1 files changed, 4 insertions, 4 deletions

diff --git a/arch/x86/kernel/apic/nmi.c b/arch/x86/kernel/apic/nmi.c
index 7ff61d6a188a..e631cc4416f7 100644
--- a/arch/x86/kernel/apic/nmi.c
+++ b/arch/x86/kernel/apic/nmi.c
@@ -360,7 +360,7 @@ void stop_apic_nmi_watchdog(void *unused)
  */
 
 static DEFINE_PER_CPU(unsigned, last_irq_sum);
-static DEFINE_PER_CPU(local_t, alert_counter);
+static DEFINE_PER_CPU(long, alert_counter);
 static DEFINE_PER_CPU(int, nmi_touch);
 
 void touch_nmi_watchdog(void)
@@ -437,8 +437,8 @@ nmi_watchdog_tick(struct pt_regs *regs, unsigned reason)
                  * Ayiee, looks like this CPU is stuck ...
                  * wait a few IRQs (5 seconds) before doing the oops ...
                  */
-                local_inc(&__get_cpu_var(alert_counter));
-                if (local_read(&__get_cpu_var(alert_counter)) == 5 * nmi_hz)
+                __this_cpu_inc(per_cpu_var(alert_counter));
+                if (__this_cpu_read(per_cpu_var(alert_counter)) == 5 * nmi_hz)
                         /*
                          * die_nmi will return ONLY if NOTIFY_STOP happens..
                          */
@@ -446,7 +446,7 @@ nmi_watchdog_tick(struct pt_regs *regs, unsigned reason)
                                 regs, panic_on_timeout);
         } else {
                 __get_cpu_var(last_irq_sum) = sum;
-                local_set(&__get_cpu_var(alert_counter), 0);
+                __this_cpu_write(per_cpu_var(alert_counter), 0);
         }
 
         /* see if the nmi watchdog went off */