X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=include%2Fasm-blackfin%2Fsystem.h;h=51494ef5bb411759c12c2db6ab69dc6d3dfbd796;hb=563e0ae06ff18f0b280f11cf706ba0172255ce52;hp=2b3d47d0bbb692f62d9242adba7adec523cc0723;hpb=e3d18658d4f28e4783e1bb1c41e9134c9e5db0a9;p=linux-2.6-omap-h63xx.git

diff --git a/include/asm-blackfin/system.h b/include/asm-blackfin/system.h
index 2b3d47d0bbb..51494ef5bb4 100644
--- a/include/asm-blackfin/system.h
+++ b/include/asm-blackfin/system.h
@@ -128,9 +128,7 @@ extern unsigned long irq_flags;
 #define mb()   asm volatile (""   : : :"memory")
 #define rmb()  asm volatile (""   : : :"memory")
 #define wmb()  asm volatile (""   : : :"memory")
-#define set_rmb(var, value)    do { (void) xchg(&var, value); } while (0)
-#define set_mb(var, value)     set_rmb(var, value)
-#define set_wmb(var, value)    do { var = value; wmb(); } while (0)
+#define set_mb(var, value) do { (void) xchg(&var, value); } while (0)
 
 #define read_barrier_depends() 		do { } while(0)
 
@@ -185,55 +183,20 @@ static inline unsigned long __xchg(unsigned long x, volatile void *ptr,
 	return tmp;
 }
 
+#include <asm-generic/cmpxchg-local.h>
+
 /*
- * Atomic compare and exchange.  Compare OLD with MEM, if identical,
- * store NEW in MEM.  Return the initial value in MEM.  Success is
- * indicated by comparing RETURN with OLD.
+ * cmpxchg_local and cmpxchg64_local are atomic wrt current CPU. Always make
+ * them available.
  */
-static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old,
-				      unsigned long new, int size)
-{
-	unsigned long tmp = 0;
-	unsigned long flags = 0;
-
-	local_irq_save(flags);
-
-	switch (size) {
-	case 1:
-		__asm__ __volatile__
-			("%0 = b%3 (z);\n\t"
-			 "CC = %1 == %0;\n\t"
-			 "IF !CC JUMP 1f;\n\t"
-			 "b%3 = %2;\n\t"
-			 "1:\n\t"
-			 : "=&d" (tmp) : "d" (old), "d" (new), "m" (*__xg(ptr)) : "memory");
-		break;
-	case 2:
-		__asm__ __volatile__
-			("%0 = w%3 (z);\n\t"
-			 "CC = %1 == %0;\n\t"
-			 "IF !CC JUMP 1f;\n\t"
-			 "w%3 = %2;\n\t"
-			 "1:\n\t"
-			 : "=&d" (tmp) : "d" (old), "d" (new), "m" (*__xg(ptr)) : "memory");
-		break;
-	case 4:
-		__asm__ __volatile__
-			("%0 = %3;\n\t"
-			 "CC = %1 == %0;\n\t"
-			 "IF !CC JUMP 1f;\n\t"
-			 "%3 = %2;\n\t"
-			 "1:\n\t"
-			 : "=&d" (tmp) : "d" (old), "d" (new), "m" (*__xg(ptr)) : "memory");
-		break;
-	}
-	local_irq_restore(flags);
-	return tmp;
-}
+#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))
 
-#define cmpxchg(ptr,o,n)\
-        ((__typeof__(*(ptr)))__cmpxchg((ptr),(unsigned long)(o),\
-                                        (unsigned long)(n),sizeof(*(ptr))))
+#ifndef CONFIG_SMP
+#include <asm-generic/cmpxchg.h>
+#endif
 
 #define prepare_to_switch()     do { } while(0)