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-rw-r--r--include/asm-x86_64/alternative.h21
1 files changed, 1 insertions, 20 deletions
diff --git a/include/asm-x86_64/alternative.h b/include/asm-x86_64/alternative.h
index aa67bfd1b3ce..a584826cc570 100644
--- a/include/asm-x86_64/alternative.h
+++ b/include/asm-x86_64/alternative.h
@@ -4,6 +4,7 @@
4#ifdef __KERNEL__ 4#ifdef __KERNEL__
5 5
6#include <linux/types.h> 6#include <linux/types.h>
7#include <asm/cpufeature.h>
7 8
8struct alt_instr { 9struct alt_instr {
9 u8 *instr; /* original instruction */ 10 u8 *instr; /* original instruction */
@@ -102,9 +103,6 @@ static inline void alternatives_smp_switch(int smp) {}
102/* 103/*
103 * Alternative inline assembly for SMP. 104 * Alternative inline assembly for SMP.
104 * 105 *
105 * alternative_smp() takes two versions (SMP first, UP second) and is
106 * for more complex stuff such as spinlocks.
107 *
108 * The LOCK_PREFIX macro defined here replaces the LOCK and 106 * The LOCK_PREFIX macro defined here replaces the LOCK and
109 * LOCK_PREFIX macros used everywhere in the source tree. 107 * LOCK_PREFIX macros used everywhere in the source tree.
110 * 108 *
@@ -124,21 +122,6 @@ static inline void alternatives_smp_switch(int smp) {}
124 */ 122 */
125 123
126#ifdef CONFIG_SMP 124#ifdef CONFIG_SMP
127#define alternative_smp(smpinstr, upinstr, args...) \
128 asm volatile ("661:\n\t" smpinstr "\n662:\n" \
129 ".section .smp_altinstructions,\"a\"\n" \
130 " .align 8\n" \
131 " .quad 661b\n" /* label */ \
132 " .quad 663f\n" /* new instruction */ \
133 " .byte 0x66\n" /* X86_FEATURE_UP */ \
134 " .byte 662b-661b\n" /* sourcelen */ \
135 " .byte 664f-663f\n" /* replacementlen */ \
136 ".previous\n" \
137 ".section .smp_altinstr_replacement,\"awx\"\n" \
138 "663:\n\t" upinstr "\n" /* replacement */ \
139 "664:\n\t.fill 662b-661b,1,0x42\n" /* space for original */ \
140 ".previous" : args)
141
142#define LOCK_PREFIX \ 125#define LOCK_PREFIX \
143 ".section .smp_locks,\"a\"\n" \ 126 ".section .smp_locks,\"a\"\n" \
144 " .align 8\n" \ 127 " .align 8\n" \
@@ -147,8 +130,6 @@ static inline void alternatives_smp_switch(int smp) {}
147 "661:\n\tlock; " 130 "661:\n\tlock; "
148 131
149#else /* ! CONFIG_SMP */ 132#else /* ! CONFIG_SMP */
150#define alternative_smp(smpinstr, upinstr, args...) \
151 asm volatile (upinstr : args)
152#define LOCK_PREFIX "" 133#define LOCK_PREFIX ""
153#endif 134#endif
154 135