platform_kernel-5.15/include/asm-i386/alternative-asm.i

#ifdef CONFIG_SMP
	.macro LOCK_PREFIX
1:	lock
	.section .smp_locks,"a"
	.align 4
	.long 1b
	.previous
	.endm
#else
	.macro LOCK_PREFIX
	.endm
#endif
[PATCH] i386: add alternative-asm.h to allow LOCK_PREFIX replacement in .S files LOCK_PREFIX is replaced by nops on UP systems, so it has to be a special macro. Previously this was only possible from C. Allow it for pure assembly files too. Similar to earlier x86-64 patch. Signed-off-by: Andi Kleen <ak@suse.de> 2006-09-26 16:52:29 +08:00			`#ifdef CONFIG_SMP`
			`.macro LOCK_PREFIX`
			`1: lock`
			`.section .smp_locks,"a"`
			`.align 4`
			`.long 1b`
			`.previous`
			`.endm`
			`#else`
			`.macro LOCK_PREFIX`
			`.endm`
			`#endif`