[ARM] 5067/1: _raw_write_can_lock macro bugfix

[linux-2.6-omap-h63xx.git] / include / asm-arm / system.h

diff --git a/include/asm-arm/system.h b/include/asm-arm/system.h
index 28425c473e71c72c7a959f6650fc6707a89d6b0e..514af792a5980bd384dc158124df7e9036bdc926 100644 (file)
--- a/include/asm-arm/system.h
+++ b/include/asm-arm/system.h
@@ -48,20 +48,6 @@
 #define CPUID_TCM      2
 #define CPUID_TLBTYPE  3
 
-#ifdef CONFIG_CPU_CP15
-#define read_cpuid(reg)                                                        \
-       ({                                                              \
-               unsigned int __val;                                     \
-               asm("mrc        p15, 0, %0, c0, c0, " __stringify(reg)  \
-                   : "=r" (__val)                                      \
-                   :                                                   \
-                   : "cc");                                            \
-               __val;                                                  \
-       })
-#else
-#define read_cpuid(reg) (processor_id)
-#endif
-
 /*
  * This is used to ensure the compiler did actually allocate the register we
  * asked it for some inline assembly sequences.  Apparently we can't trust
@@ -78,6 +64,21 @@
 #include <linux/stringify.h>
 #include <linux/irqflags.h>
 
+#ifdef CONFIG_CPU_CP15
+#define read_cpuid(reg)                                                        \
+       ({                                                              \
+               unsigned int __val;                                     \
+               asm("mrc        p15, 0, %0, c0, c0, " __stringify(reg)  \
+                   : "=r" (__val)                                      \
+                   :                                                   \
+                   : "cc");                                            \
+               __val;                                                  \
+       })
+#else
+extern unsigned int processor_id;
+#define read_cpuid(reg) (processor_id)
+#endif
+
 /*
  * The CPU ID never changes at run time, so we might as well tell the
  * compiler that it's constant.  Use this function to read the CPU ID
@@ -363,6 +364,21 @@ static inline unsigned long __xchg(unsigned long x, volatile void *ptr, int size
 extern void disable_hlt(void);
 extern void enable_hlt(void);
 
+#include <asm-generic/cmpxchg-local.h>
+
+/*
+ * cmpxchg_local and cmpxchg64_local are atomic wrt current CPU. Always make
+ * them available.
+ */
+#define cmpxchg_local(ptr, o, n)                                              \
+       ((__typeof__(*(ptr)))__cmpxchg_local_generic((ptr), (unsigned long)(o),\
+                       (unsigned long)(n), sizeof(*(ptr))))
+#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n))
+
+#ifndef CONFIG_SMP
+#include <asm-generic/cmpxchg.h>
+#endif
+
 #endif /* __ASSEMBLY__ */
 
 #define arch_align_stack(x) (x)