Merge branch 'linus' into perfcounters/core

Conflicts:
	arch/x86/kernel/irqinit.c
	arch/x86/kernel/irqinit_64.c
	arch/x86/kernel/traps.c
	arch/x86/mm/fault.c
	include/linux/sched.h
	kernel/exit.c

1 files changed, 23 insertions, 36 deletions

diff --git a/arch/x86/include/asm/alternative.h b/arch/x86/include/asm/alternative.h
index f6aa18eadf71..1a37bcdc8606 100644
--- a/arch/x86/include/asm/alternative.h
+++ b/arch/x86/include/asm/alternative.h
@@ -3,6 +3,7 @@
 
 #include <linux/types.h>
 #include <linux/stddef.h>
+#include <linux/stringify.h>
 #include <asm/asm.h>
 
 /*
@@ -74,6 +75,22 @@ static inline void alternatives_smp_switch(int smp) {}
 
 const unsigned char *const *find_nop_table(void);
 
+/* alternative assembly primitive: */
+#define ALTERNATIVE(oldinstr, newinstr, feature)                        \
+                                                                        \
+      "661:\n\t" oldinstr "\n662:\n"                                    \
+      ".section .altinstructions,\"a\"\n"                               \
+      _ASM_ALIGN "\n"                                                   \
+      _ASM_PTR "661b\n"                         /* label           */   \
+      _ASM_PTR "663f\n"                         /* new instruction */   \
+      "  .byte " __stringify(feature) "\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"
+
 /*
  * Alternative instructions for different CPU types or capabilities.
  *
@@ -87,18 +104,7 @@ const unsigned char *const *find_nop_table(void);
  * without volatile and memory clobber.
  */
 #define alternative(oldinstr, newinstr, feature)                        \
-        asm volatile ("661:\n\t" oldinstr "\n662:\n"                    \
-                      ".section .altinstructions,\"a\"\n"               \
-                      _ASM_ALIGN "\n"                                   \
-                      _ASM_PTR "661b\n"         /* label */             \
-                      _ASM_PTR "663f\n"         /* new instruction */   \
-                      "  .byte %c0\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" :: "i" (feature) : "memory")
+        asm volatile (ALTERNATIVE(oldinstr, newinstr, feature) : : : "memory")
 
 /*
  * Alternative inline assembly with input.
@@ -109,35 +115,16 @@ const unsigned char *const *find_nop_table(void);
  * Best is to use constraints that are fixed size (like (%1) ... "r")
  * If you use variable sized constraints like "m" or "g" in the
  * replacement make sure to pad to the worst case length.
+ * Leaving an unused argument 0 to keep API compatibility.
  */
 #define alternative_input(oldinstr, newinstr, feature, input...)        \
-        asm volatile ("661:\n\t" oldinstr "\n662:\n"                    \
-                      ".section .altinstructions,\"a\"\n"               \
-                      _ASM_ALIGN "\n"                                   \
-                      _ASM_PTR "661b\n"         /* label */             \
-                      _ASM_PTR "663f\n"         /* new instruction */   \
-                      "  .byte %c0\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" :: "i" (feature), ##input)
+        asm volatile (ALTERNATIVE(oldinstr, newinstr, feature)          \
+                : : "i" (0), ## 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"               \
-                      _ASM_ALIGN "\n"                                   \
-                      _ASM_PTR "661b\n"         /* label */             \
-                      _ASM_PTR "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)
+        asm volatile (ALTERNATIVE(oldinstr, newinstr, feature)          \
+                : output : "i" (0), ## input)
 
 /*
  * use this macro(s) if you need more than one output parameter