[PATCH] x86_64: x86_64 version of the smp alternative patch.

[platform/adaptation/renesas_rcar/renesas_kernel.git] / include / asm-x86_64 / system.h

diff --git a/include/asm-x86_64/system.h b/include/asm-x86_64/system.h
index a73f0c7..68e559f 100644 (file)
--- a/include/asm-x86_64/system.h
+++ b/include/asm-x86_64/system.h
@@ -1,18 +1,12 @@
 #ifndef __ASM_SYSTEM_H
 #define __ASM_SYSTEM_H
 
-#include <linux/config.h>
 #include <linux/kernel.h>
 #include <asm/segment.h>
+#include <asm/alternative.h>
 
 #ifdef __KERNEL__
 
-#ifdef CONFIG_SMP
-#define LOCK_PREFIX "lock ; "
-#else
-#define LOCK_PREFIX ""
-#endif
-
 #define __STR(x) #x
 #define STR(x) __STR(x)
 
@@ -35,7 +29,7 @@
                     "thread_return:\n\t"                                           \
                     "movq %%gs:%P[pda_pcurrent],%%rsi\n\t"                       \
                     "movq %P[thread_info](%%rsi),%%r8\n\t"                       \
-                    LOCK "btr  %[tif_fork],%P[ti_flags](%%r8)\n\t"               \
+                    LOCK_PREFIX "btr  %[tif_fork],%P[ti_flags](%%r8)\n\t"        \
                     "movq %%rax,%%rdi\n\t"                                       \
                     "jc   ret_from_fork\n\t"                                     \
                     RESTORE_CONTEXT                                                \
@@ -70,88 +64,6 @@ extern void load_gs_index(unsigned);
                ".previous"                     \
                : :"r" (value), "r" (0))
 
-#define set_debug(value,register) \
-                __asm__("movq %0,%%db" #register  \
-               : /* no output */ \
-               :"r" ((unsigned long) value))
-
-
-#ifdef __KERNEL__
-struct alt_instr { 
-       __u8 *instr;            /* original instruction */
-       __u8 *replacement;
-       __u8  cpuid;            /* cpuid bit set for replacement */
-       __u8  instrlen;         /* length of original instruction */
-       __u8  replacementlen;   /* length of new instruction, <= instrlen */ 
-       __u8  pad[5];
-}; 
-#endif
-
-/*
- * Alternative instructions for different CPU types or capabilities.
- * 
- * This allows to use optimized instructions even on generic binary
- * kernels.
- * 
- * length of oldinstr must be longer or equal the length of newinstr
- * It can be padded with nops as needed.
- * 
- * For non barrier like inlines please define new variants
- * without volatile and memory clobber.
- */
-#define alternative(oldinstr, newinstr, feature)       \
-       asm volatile ("661:\n\t" oldinstr "\n662:\n"                 \
-                     ".section .altinstructions,\"a\"\n"            \
-                     "  .align 8\n"                                   \
-                     "  .quad 661b\n"            /* label */          \
-                     "  .quad 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")  
-
-/*
- * Alternative inline assembly with input.
- * 
- * Peculiarities:
- * No memory clobber here. 
- * Argument numbers start with 1.
- * 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.
- */
-#define alternative_input(oldinstr, newinstr, feature, input...)       \
-       asm volatile ("661:\n\t" oldinstr "\n662:\n"                    \
-                     ".section .altinstructions,\"a\"\n"               \
-                     "  .align 8\n"                                    \
-                     "  .quad 661b\n"            /* label */           \
-                     "  .quad 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)
-
-/* 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 8\n"                                    \
-                     "  .quad 661b\n"            /* label */           \
-                     "  .quad 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)
-
 /*
  * Clear and set 'TS' bit respectively
  */
@@ -327,7 +239,7 @@ static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old,
 #define wmb()  asm volatile("" ::: "memory")
 #endif
 #define read_barrier_depends() do {} while(0)
-#define set_mb(var, value) do { xchg(&var, value); } while (0)
+#define set_mb(var, value) do { (void) xchg(&var, value); } while (0)
 #define set_wmb(var, value) do { var = value; wmb(); } while (0)
 
 #define warn_if_not_ulong(x) do { unsigned long foo; (void) (&(x) == &foo); } while (0)
@@ -373,5 +285,6 @@ static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old,
 void cpu_idle_wait(void);
 
 extern unsigned long arch_align_stack(unsigned long sp);
+extern void free_init_pages(char *what, unsigned long begin, unsigned long end);
 
 #endif