make atomic64_t work like atomic_t

From: Chris Snook <csnook@redhat.com>

The volatile keyword has already been removed from the declaration of atomic_t
on x86_64.  For consistency, remove it from atomic64_t as well.

Signed-off-by: Chris Snook <csnook@redhat.com>
Signed-off-by: Andi Kleen <ak@suse.de>
CC: Andi Kleen <andi@firstfloor.org>

---
 include/asm-x86_64/atomic.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: linux/include/asm-x86_64/atomic.h
===================================================================
--- linux.orig/include/asm-x86_64/atomic.h
+++ linux/include/asm-x86_64/atomic.h
@@ -206,7 +206,7 @@ static __inline__ int atomic_sub_return(
 
 /* An 64bit atomic type */
 
-typedef struct { volatile long counter; } atomic64_t;
+typedef struct { long counter; } atomic64_t;
 
 #define ATOMIC64_INIT(i)	{ (i) }