From: Ingo Molnar <mingo@elte.hu>
Date: Fri, 3 Jul 2009 13:29:25 +0000 (-0500)
Subject: x86: Mark atomic irq ops raw for 32bit legacy
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=17c0e7107bed3d578864e6519f7f4e4c324c8f58;p=linux-beck.git

x86: Mark atomic irq ops raw for 32bit legacy

The atomic ops emulation for 32bit legacy CPUs floods the tracer with
irq off/on entries. The irq disabled regions are short and therefor
not interesting when chasing long irq disabled latencies. Mark them
raw and keep them out of the trace.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---

diff --git a/arch/x86/include/asm/atomic.h b/arch/x86/include/asm/atomic.h
index 8baaa719fa7f..8f8217b9bdac 100644
--- a/arch/x86/include/asm/atomic.h
+++ b/arch/x86/include/asm/atomic.h
@@ -187,10 +187,10 @@ static inline int atomic_add_return(int i, atomic_t *v)
 
 #ifdef CONFIG_M386
 no_xadd: /* Legacy 386 processor */
-	local_irq_save(flags);
+	raw_local_irq_save(flags);
 	__i = atomic_read(v);
 	atomic_set(v, i + __i);
-	local_irq_restore(flags);
+	raw_local_irq_restore(flags);
 	return i + __i;
 #endif
 }