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x86: __force_order doesn't need to be an actual variable

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It being static causes over a dozen instances to be scattered
across the kernel image, with non of them ever being referenced
in any way. Making the variable extern without ever defining it
works as well - all we need is to have the compiler think the
variable is being accessed.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Link: http://lkml.kernel.org/r/51A610B802000078000D99A0@nat28.tlf.novell.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Jan Beulich 2013-05-29 13:29:12 +01:00 committed by Ingo Molnar
parent dcdbe33add
commit 1d10f6ee60
1 changed files with 1 additions and 1 deletions
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arch/x86/include/asm/special_insns.h
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@ -16,7 +16,7 @@ static inline void native_clts(void)
* all loads stores around it, which can hurt performance. Solution is to
* use a variable and mimic reads and writes to it to enforce serialization
*/
static unsigned long __force_order;
extern unsigned long __force_order;
static inline unsigned long native_read_cr0(void)
{