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[PATCH] i386: Abstract sensitive instructions

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Abstract sensitive instructions in assembler code, replacing them with macros
(which currently are #defined to the native versions).  We use long names:
assembler is case-insensitive, so if something goes wrong and macros do not
expand, it would assemble anyway.

Resulting object files are exactly the same as before.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Andi Kleen <ak@suse.de>
This commit is contained in:
Rusty Russell
2006-09-26 10:52:39 +02:00
committed by Andi Kleen
parent 7b0bda74f7
commit 0da5db3133
2 changed files with 27 additions and 18 deletions
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7
include/asm-i386/spinlock.h
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@@ -7,6 +7,9 @@
#include <asm/processor.h>
#include <linux/compiler.h>
#define CLI_STRING "cli"
#define STI_STRING "sti"
/*
* Your basic SMP spinlocks, allowing only a single CPU anywhere
*
@@ -55,12 +58,12 @@ static inline void __raw_spin_lock_flags(raw_spinlock_t *lock, unsigned long fla
"2:\t"
"testl $0x200, %1\n\t"
"jz 4f\n\t"
"sti\n"
STI_STRING "\n"
"3:\t"
"rep;nop\n\t"
"cmpb $0, %0\n\t"
"jle 3b\n\t"
"cli\n\t"
CLI_STRING "\n\t"
"jmp 1b\n"
"4:\t"
"rep;nop\n\t"