x86_64: Fix wrong gcc check in bitops.h

[karo-tx-linux.git] / include / asm-x86_64 / bitops.h

diff --git a/include/asm-x86_64/bitops.h b/include/asm-x86_64/bitops.h
index e9bf933d25d0a78f55d45be879b4dee1f7e4b770..d4dbbe5f7bd9f466451e0ee65572b6accf929277 100644 (file)
--- a/include/asm-x86_64/bitops.h
+++ b/include/asm-x86_64/bitops.h
@@ -5,15 +5,16 @@
  * Copyright 1992, Linus Torvalds.
  */
 
+#include <asm/alternative.h>
 
-#ifdef CONFIG_SMP
-#define LOCK_PREFIX "lock ; "
+#if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 1)
+/* Technically wrong, but this avoids compilation errors on some gcc
+   versions. */
+#define ADDR "=m" (*(volatile long *) addr)
 #else
-#define LOCK_PREFIX ""
+#define ADDR "+m" (*(volatile long *) addr)
 #endif
 
-#define ADDR (*(volatile long *) addr)
-
 /**
  * set_bit - Atomically set a bit in memory
  * @nr: the bit to set
@@ -28,7 +29,7 @@ static __inline__ void set_bit(int nr, volatile void * addr)
 {
        __asm__ __volatile__( LOCK_PREFIX
                "btsl %1,%0"
-               :"+m" (ADDR)
+               :ADDR
                :"dIr" (nr) : "memory");
 }
 
@@ -45,7 +46,7 @@ static __inline__ void __set_bit(int nr, volatile void * addr)
 {
        __asm__ volatile(
                "btsl %1,%0"
-               :"+m" (ADDR)
+               :ADDR
                :"dIr" (nr) : "memory");
 }
 
@@ -63,7 +64,7 @@ static __inline__ void clear_bit(int nr, volatile void * addr)
 {
        __asm__ __volatile__( LOCK_PREFIX
                "btrl %1,%0"
-               :"+m" (ADDR)
+               :ADDR
                :"dIr" (nr));
 }
 
@@ -71,7 +72,7 @@ static __inline__ void __clear_bit(int nr, volatile void * addr)
 {
        __asm__ __volatile__(
                "btrl %1,%0"
-               :"+m" (ADDR)
+               :ADDR
                :"dIr" (nr));
 }
 
@@ -91,7 +92,7 @@ static __inline__ void __change_bit(int nr, volatile void * addr)
 {
        __asm__ __volatile__(
                "btcl %1,%0"
-               :"+m" (ADDR)
+               :ADDR
                :"dIr" (nr));
 }
 
@@ -108,7 +109,7 @@ static __inline__ void change_bit(int nr, volatile void * addr)
 {
        __asm__ __volatile__( LOCK_PREFIX
                "btcl %1,%0"
-               :"+m" (ADDR)
+               :ADDR
                :"dIr" (nr));
 }
 
@@ -126,7 +127,7 @@ static __inline__ int test_and_set_bit(int nr, volatile void * addr)
 
        __asm__ __volatile__( LOCK_PREFIX
                "btsl %2,%1\n\tsbbl %0,%0"
-               :"=r" (oldbit),"+m" (ADDR)
+               :"=r" (oldbit),ADDR
                :"dIr" (nr) : "memory");
        return oldbit;
 }
@@ -146,7 +147,7 @@ static __inline__ int __test_and_set_bit(int nr, volatile void * addr)
 
        __asm__(
                "btsl %2,%1\n\tsbbl %0,%0"
-               :"=r" (oldbit),"+m" (ADDR)
+               :"=r" (oldbit),ADDR
                :"dIr" (nr));
        return oldbit;
 }
@@ -165,7 +166,7 @@ static __inline__ int test_and_clear_bit(int nr, volatile void * addr)
 
        __asm__ __volatile__( LOCK_PREFIX
                "btrl %2,%1\n\tsbbl %0,%0"
-               :"=r" (oldbit),"+m" (ADDR)
+               :"=r" (oldbit),ADDR
                :"dIr" (nr) : "memory");
        return oldbit;
 }
@@ -185,7 +186,7 @@ static __inline__ int __test_and_clear_bit(int nr, volatile void * addr)
 
        __asm__(
                "btrl %2,%1\n\tsbbl %0,%0"
-               :"=r" (oldbit),"+m" (ADDR)
+               :"=r" (oldbit),ADDR
                :"dIr" (nr));
        return oldbit;
 }
@@ -197,7 +198,7 @@ static __inline__ int __test_and_change_bit(int nr, volatile void * addr)
 
        __asm__ __volatile__(
                "btcl %2,%1\n\tsbbl %0,%0"
-               :"=r" (oldbit),"+m" (ADDR)
+               :"=r" (oldbit),ADDR
                :"dIr" (nr) : "memory");
        return oldbit;
 }
@@ -216,7 +217,7 @@ static __inline__ int test_and_change_bit(int nr, volatile void * addr)
 
        __asm__ __volatile__( LOCK_PREFIX
                "btcl %2,%1\n\tsbbl %0,%0"
-               :"=r" (oldbit),"+m" (ADDR)
+               :"=r" (oldbit),ADDR
                :"dIr" (nr) : "memory");
        return oldbit;
 }
@@ -242,7 +243,7 @@ static __inline__ int variable_test_bit(int nr, volatile const void * addr)
        __asm__ __volatile__(
                "btl %2,%1\n\tsbbl %0,%0"
                :"=r" (oldbit)
-               :"m" (ADDR),"dIr" (nr));
+               :"m" (*(volatile long *)addr),"dIr" (nr));
        return oldbit;
 }
 
@@ -404,6 +405,8 @@ static __inline__ int fls(int x)
        return r+1;
 }
 
+#define ARCH_HAS_FAST_MULTIPLIER 1
+
 #include <asm-generic/bitops/hweight.h>
 
 #endif /* __KERNEL__ */