[PATCH] i386: Implement alternative_io for i386 (e859dc55) · Commits · e / devices / android_kernel_samsung_universal8895

include/asm-i386/alternative.h

+15 −0

Original line number	Diff line number	Diff line
		@@ -82,6 +82,21 @@ static inline void alternatives_smp_switch(int smp) {}
		"663:\n\t" newinstr "\n664:\n" /* replacement */\
		".previous" :: "i" (feature), ##input)

		/* Like alternative_input, but with a single output argument */
		#define alternative_io(oldinstr, newinstr, feature, output, input...) \
		asm volatile ("661:\n\t" oldinstr "\n662:\n" \
		".section .altinstructions,\"a\"\n" \
		" .align 4\n" \
		" .long 661b\n" /* label */ \
		" .long 663f\n" /* new instruction */ \
		" .byte %c[feat]\n" /* feature bit */ \
		" .byte 662b-661b\n" /* sourcelen */ \
		" .byte 664f-663f\n" /* replacementlen */ \
		".previous\n" \
		".section .altinstr_replacement,\"ax\"\n" \
		"663:\n\t" newinstr "\n664:\n" /* replacement */ \
		".previous" : output : [feat] "i" (feature), ##input)

		/*
		* Alternative inline assembly for SMP.
		*