Merge branch 'master' into percpu
[sfrench/cifs-2.6.git] / arch / x86 / include / asm / system.h
index de10c19d95586b6b59251ad959d6e8990dd65d9c..e529f26c3292762193e6281f832fc90e01daa1b2 100644 (file)
@@ -23,6 +23,7 @@ struct task_struct *__switch_to(struct task_struct *prev,
 struct tss_struct;
 void __switch_to_xtra(struct task_struct *prev_p, struct task_struct *next_p,
                      struct tss_struct *tss);
+extern void show_regs_common(void);
 
 #ifdef CONFIG_X86_32
 
@@ -128,8 +129,6 @@ do {                                                                        \
             "movq %%rsp,%P[threadrsp](%[prev])\n\t" /* save RSP */       \
             "movq %P[threadrsp](%[next]),%%rsp\n\t" /* restore RSP */    \
             "call __switch_to\n\t"                                       \
-            ".globl thread_return\n"                                     \
-            "thread_return:\n\t"                                         \
             "movq "__percpu_arg([current_task])",%%rsi\n\t"              \
             __switch_canary                                              \
             "movq %P[thread_info](%%rsi),%%r8\n\t"                       \
@@ -157,19 +156,22 @@ extern void native_load_gs_index(unsigned);
  * Load a segment. Fall back on loading the zero
  * segment if something goes wrong..
  */
-#define loadsegment(seg, value)                        \
-       asm volatile("\n"                       \
-                    "1:\t"                     \
-                    "movl %k0,%%" #seg "\n"    \
-                    "2:\n"                     \
-                    ".section .fixup,\"ax\"\n" \
-                    "3:\t"                     \
-                    "movl %k1, %%" #seg "\n\t" \
-                    "jmp 2b\n"                 \
-                    ".previous\n"              \
-                    _ASM_EXTABLE(1b,3b)        \
-                    : :"r" (value), "r" (0) : "memory")
-
+#define loadsegment(seg, value)                                                \
+do {                                                                   \
+       unsigned short __val = (value);                                 \
+                                                                       \
+       asm volatile("                                          \n"     \
+                    "1:        movl %k0,%%" #seg "             \n"     \
+                                                                       \
+                    ".section .fixup,\"ax\"                    \n"     \
+                    "2:        xorl %k0,%k0                    \n"     \
+                    "          jmp 1b                          \n"     \
+                    ".previous                                 \n"     \
+                                                                       \
+                    _ASM_EXTABLE(1b, 2b)                               \
+                                                                       \
+                    : "+r" (__val) : : "memory");                      \
+} while (0)
 
 /*
  * Save a segment register away