Merge branch 'for-2.6.40' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu

[cascardo/linux.git] / arch / x86 / include / asm / percpu.h

diff --git a/arch/x86/include/asm/percpu.h b/arch/x86/include/asm/percpu.h
index 53278b0..a0a9779 100644 (file)
--- a/arch/x86/include/asm/percpu.h
+++ b/arch/x86/include/asm/percpu.h
@@ -509,6 +509,11 @@ do {                                                                       \
  * it in software.  The address used in the cmpxchg16 instruction must be
  * aligned to a 16 byte boundary.
  */
+#ifdef CONFIG_SMP
+#define CMPXCHG16B_EMU_CALL "call this_cpu_cmpxchg16b_emu\n\t" ASM_NOP3
+#else
+#define CMPXCHG16B_EMU_CALL "call this_cpu_cmpxchg16b_emu\n\t" ASM_NOP2
+#endif
 #define percpu_cmpxchg16b_double(pcp1, o1, o2, n1, n2)                 \
 ({                                                                     \
        char __ret;                                                     \
@@ -517,7 +522,7 @@ do {                                                                        \
        typeof(o2) __o2 = o2;                                           \
        typeof(o2) __n2 = n2;                                           \
        typeof(o2) __dummy;                                             \
-       alternative_io("call this_cpu_cmpxchg16b_emu\n\t" ASM_NOP4,     \
+       alternative_io(CMPXCHG16B_EMU_CALL,                             \
                       "cmpxchg16b " __percpu_prefix "(%%rsi)\n\tsetz %0\n\t",  \
                       X86_FEATURE_CX16,                                \
                       ASM_OUTPUT2("=a"(__ret), "=d"(__dummy)),         \