From: Michael Cree <mcree@orcon.net.nz>
Date: Sun, 19 Sep 2010 06:05:40 +0000 (-0400)
Subject: alpha: Shift perf event pending work earlier in timer interrupt
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=bdc8b8914b17cf97b53e5f7af8168d68cfb089d6;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git

alpha: Shift perf event pending work earlier in timer interrupt

Pending work from the performance event subsystem is executed in
the timer interrupt.  This patch shifts the call to
perf_event_do_pending() before the call to update_process_times()
as the latter may call back into the perf event subsystem and it
is prudent to have the pending work executed first.

Signed-off-by: Michael Cree <mcree@orcon.net.nz>
Signed-off-by: Matt Turner <mattst88@gmail.com>
---

diff --git a/arch/alpha/kernel/time.c b/arch/alpha/kernel/time.c
index eacceb26d9c..396af1799ea 100644
--- a/arch/alpha/kernel/time.c
+++ b/arch/alpha/kernel/time.c
@@ -191,16 +191,16 @@ irqreturn_t timer_interrupt(int irq, void *dev)
 
 	write_sequnlock(&xtime_lock);
 
-#ifndef CONFIG_SMP
-	while (nticks--)
-		update_process_times(user_mode(get_irq_regs()));
-#endif
-
 	if (test_perf_event_pending()) {
 		clear_perf_event_pending();
 		perf_event_do_pending();
 	}
 
+#ifndef CONFIG_SMP
+	while (nticks--)
+		update_process_times(user_mode(get_irq_regs()));
+#endif
+
 	return IRQ_HANDLED;
 }