Merge branch 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied...

[pandora-kernel.git] / include / asm-x86 / percpu.h

diff --git a/include/asm-x86/percpu.h b/include/asm-x86/percpu.h
index 0dec00f..912a3a1 100644 (file)
--- a/include/asm-x86/percpu.h
+++ b/include/asm-x86/percpu.h
@@ -85,58 +85,108 @@ DECLARE_PER_CPU(unsigned long, this_cpu_off);
  * don't give an lvalue though). */
 extern void __bad_percpu_size(void);
 
-#define percpu_to_op(op,var,val)                               \
-       do {                                                    \
-               typedef typeof(var) T__;                        \
-               if (0) { T__ tmp__; tmp__ = (val); }            \
-               switch (sizeof(var)) {                          \
-               case 1:                                         \
-                       asm(op "b %1,"__percpu_seg"%0"          \
-                           : "+m" (var)                        \
-                           :"ri" ((T__)val));                  \
-                       break;                                  \
-               case 2:                                         \
-                       asm(op "w %1,"__percpu_seg"%0"          \
-                           : "+m" (var)                        \
-                           :"ri" ((T__)val));                  \
-                       break;                                  \
-               case 4:                                         \
-                       asm(op "l %1,"__percpu_seg"%0"          \
-                           : "+m" (var)                        \
-                           :"ri" ((T__)val));                  \
-                       break;                                  \
-               default: __bad_percpu_size();                   \
-               }                                               \
-       } while (0)
-
-#define percpu_from_op(op,var)                                 \
-       ({                                                      \
-               typeof(var) ret__;                              \
-               switch (sizeof(var)) {                          \
-               case 1:                                         \
-                       asm(op "b "__percpu_seg"%1,%0"          \
-                           : "=r" (ret__)                      \
-                           : "m" (var));                       \
-                       break;                                  \
-               case 2:                                         \
-                       asm(op "w "__percpu_seg"%1,%0"          \
-                           : "=r" (ret__)                      \
-                           : "m" (var));                       \
-                       break;                                  \
-               case 4:                                         \
-                       asm(op "l "__percpu_seg"%1,%0"          \
-                           : "=r" (ret__)                      \
-                           : "m" (var));                       \
-                       break;                                  \
-               default: __bad_percpu_size();                   \
-               }                                               \
-               ret__; })
+#define percpu_to_op(op, var, val)                     \
+do {                                                   \
+       typedef typeof(var) T__;                        \
+       if (0) {                                        \
+               T__ tmp__;                              \
+               tmp__ = (val);                          \
+       }                                               \
+       switch (sizeof(var)) {                          \
+       case 1:                                         \
+               asm(op "b %1,"__percpu_seg"%0"          \
+                   : "+m" (var)                        \
+                   : "ri" ((T__)val));                 \
+               break;                                  \
+       case 2:                                         \
+               asm(op "w %1,"__percpu_seg"%0"          \
+                   : "+m" (var)                        \
+                   : "ri" ((T__)val));                 \
+               break;                                  \
+       case 4:                                         \
+               asm(op "l %1,"__percpu_seg"%0"          \
+                   : "+m" (var)                        \
+                   : "ri" ((T__)val));                 \
+               break;                                  \
+       default: __bad_percpu_size();                   \
+       }                                               \
+} while (0)
+
+#define percpu_from_op(op, var)                                \
+({                                                     \
+       typeof(var) ret__;                              \
+       switch (sizeof(var)) {                          \
+       case 1:                                         \
+               asm(op "b "__percpu_seg"%1,%0"          \
+                   : "=r" (ret__)                      \
+                   : "m" (var));                       \
+               break;                                  \
+       case 2:                                         \
+               asm(op "w "__percpu_seg"%1,%0"          \
+                   : "=r" (ret__)                      \
+                   : "m" (var));                       \
+               break;                                  \
+       case 4:                                         \
+               asm(op "l "__percpu_seg"%1,%0"          \
+                   : "=r" (ret__)                      \
+                   : "m" (var));                       \
+               break;                                  \
+       default: __bad_percpu_size();                   \
+       }                                               \
+       ret__;                                          \
+})
 
 #define x86_read_percpu(var) percpu_from_op("mov", per_cpu__##var)
-#define x86_write_percpu(var,val) percpu_to_op("mov", per_cpu__##var, val)
-#define x86_add_percpu(var,val) percpu_to_op("add", per_cpu__##var, val)
-#define x86_sub_percpu(var,val) percpu_to_op("sub", per_cpu__##var, val)
-#define x86_or_percpu(var,val) percpu_to_op("or", per_cpu__##var, val)
+#define x86_write_percpu(var, val) percpu_to_op("mov", per_cpu__##var, val)
+#define x86_add_percpu(var, val) percpu_to_op("add", per_cpu__##var, val)
+#define x86_sub_percpu(var, val) percpu_to_op("sub", per_cpu__##var, val)
+#define x86_or_percpu(var, val) percpu_to_op("or", per_cpu__##var, val)
 #endif /* !__ASSEMBLY__ */
 #endif /* !CONFIG_X86_64 */
+
+#ifdef CONFIG_SMP
+
+/*
+ * Define the "EARLY_PER_CPU" macros.  These are used for some per_cpu
+ * variables that are initialized and accessed before there are per_cpu
+ * areas allocated.
+ */
+
+#define        DEFINE_EARLY_PER_CPU(_type, _name, _initvalue)                  \
+       DEFINE_PER_CPU(_type, _name) = _initvalue;                      \
+       __typeof__(_type) _name##_early_map[NR_CPUS] __initdata =       \
+                               { [0 ... NR_CPUS-1] = _initvalue };     \
+       __typeof__(_type) *_name##_early_ptr = _name##_early_map
+
+#define EXPORT_EARLY_PER_CPU_SYMBOL(_name)                     \
+       EXPORT_PER_CPU_SYMBOL(_name)
+
+#define DECLARE_EARLY_PER_CPU(_type, _name)                    \
+       DECLARE_PER_CPU(_type, _name);                          \
+       extern __typeof__(_type) *_name##_early_ptr;            \
+       extern __typeof__(_type)  _name##_early_map[]
+
+#define        early_per_cpu_ptr(_name) (_name##_early_ptr)
+#define        early_per_cpu_map(_name, _idx) (_name##_early_map[_idx])
+#define        early_per_cpu(_name, _cpu)                              \
+       (early_per_cpu_ptr(_name) ?                             \
+               early_per_cpu_ptr(_name)[_cpu] :                \
+               per_cpu(_name, _cpu))
+
+#else  /* !CONFIG_SMP */
+#define        DEFINE_EARLY_PER_CPU(_type, _name, _initvalue)          \
+       DEFINE_PER_CPU(_type, _name) = _initvalue
+
+#define EXPORT_EARLY_PER_CPU_SYMBOL(_name)                     \
+       EXPORT_PER_CPU_SYMBOL(_name)
+
+#define DECLARE_EARLY_PER_CPU(_type, _name)                    \
+       DECLARE_PER_CPU(_type, _name)
+
+#define        early_per_cpu(_name, _cpu) per_cpu(_name, _cpu)
+#define        early_per_cpu_ptr(_name) NULL
+/* no early_per_cpu_map() */
+
+#endif /* !CONFIG_SMP */
+
 #endif /* _ASM_X86_PERCPU_H_ */