linux-kernel - [patch] x86: convert rdtscll() to use __native_read

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Date:	Tue, 16 Dec 2008 00:32:21 -0800
From:	Ken Chen <kenchen@...gle.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [patch] x86: convert rdtscll() to use __native_read_tsc

Is there any reason why x86 rdtscll have to use the out of line
function instead of inline __native_read_tsc()?  native_read_tsc and
__native_read_tsc is essentially the same functions.

Patch to let x86 rdtscll() to use the inline version of read_tsc.

Signed-off-by: Ken Chen <kenchen@...gle.com>


diff --git a/arch/x86/include/asm/msr.h b/arch/x86/include/asm/msr.h
index c2a812e..42f639b 100644
--- a/arch/x86/include/asm/msr.h
+++ b/arch/x86/include/asm/msr.h
@@ -181,10 +181,10 @@ static inline int rdmsrl_amd_safe
 }

 #define rdtscl(low)						\
-	((low) = (u32)native_read_tsc())
+	((low) = (u32)__native_read_tsc())

 #define rdtscll(val)						\
-	((val) = native_read_tsc())
+	((val) = __native_read_tsc())

 #define rdpmc(counter, low, high)			\
 do {							\
--
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