powerpc: Tell gcc when we clobber the carry in inline asm

We have several instances of inline assembly code that use the addic
or addic. instructions, but don't include XER in the list of clobbers.
The addic and addic. instructions affect the carry bit, which is in
the XER register.

This adds "xer" to the list of clobbers for those inline asm
statements that use addic or addic. and didn't already have it.
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/include/asm/atomic.h

@@ -111,7 +111,7 @@ static __inline__ void atomic_inc(atomic_t *v)
 	bne-	1b"
 	: "=&r" (t), "+m" (v->counter)
 	: "r" (&v->counter)
-	: "cc");
+	: "cc", "xer");
 }
 
 static __inline__ int atomic_inc_return(atomic_t *v)
@@ -128,7 +128,7 @@ static __inline__ int atomic_inc_return(atomic_t *v)
 	ISYNC_ON_SMP
 	: "=&r" (t)
 	: "r" (&v->counter)
-	: "cc", "memory");
+	: "cc", "xer", "memory");
 
 	return t;
 }
@@ -155,7 +155,7 @@ static __inline__ void atomic_dec(atomic_t *v)
 	bne-	1b"
 	: "=&r" (t), "+m" (v->counter)
 	: "r" (&v->counter)
-	: "cc");
+	: "cc", "xer");
 }
 
 static __inline__ int atomic_dec_return(atomic_t *v)
@@ -172,7 +172,7 @@ static __inline__ int atomic_dec_return(atomic_t *v)
 	ISYNC_ON_SMP
 	: "=&r" (t)
 	: "r" (&v->counter)
-	: "cc", "memory");
+	: "cc", "xer", "memory");
 
 	return t;
 }
@@ -346,7 +346,7 @@ static __inline__ void atomic64_inc(atomic64_t *v)
 	bne-	1b"
 	: "=&r" (t), "+m" (v->counter)
 	: "r" (&v->counter)
-	: "cc");
+	: "cc", "xer");
 }
 
 static __inline__ long atomic64_inc_return(atomic64_t *v)
@@ -362,7 +362,7 @@ static __inline__ long atomic64_inc_return(atomic64_t *v)
 	ISYNC_ON_SMP
 	: "=&r" (t)
 	: "r" (&v->counter)
-	: "cc", "memory");
+	: "cc", "xer", "memory");
 
 	return t;
 }
@@ -388,7 +388,7 @@ static __inline__ void atomic64_dec(atomic64_t *v)
 	bne-	1b"
 	: "=&r" (t), "+m" (v->counter)
 	: "r" (&v->counter)
-	: "cc");
+	: "cc", "xer");
 }
 
 static __inline__ long atomic64_dec_return(atomic64_t *v)
@@ -404,7 +404,7 @@ static __inline__ long atomic64_dec_return(atomic64_t *v)
 	ISYNC_ON_SMP
 	: "=&r" (t)
 	: "r" (&v->counter)
-	: "cc", "memory");
+	: "cc", "xer", "memory");
 
 	return t;
 }
@@ -431,7 +431,7 @@ static __inline__ long atomic64_dec_if_positive(atomic64_t *v)
 	"\n\
 2:"	: "=&r" (t)
 	: "r" (&v->counter)
-	: "cc", "memory");
+	: "cc", "xer", "memory");
 
 	return t;
 }

arch/powerpc/include/asm/local.h

@@ -67,7 +67,7 @@ static __inline__ long local_inc_return(local_t *l)
 	bne-	1b"
 	: "=&r" (t)
 	: "r" (&(l->a.counter))
-	: "cc", "memory");
+	: "cc", "xer", "memory");
 
 	return t;
 }
@@ -94,7 +94,7 @@ static __inline__ long local_dec_return(local_t *l)
 	bne-	1b"
 	: "=&r" (t)
 	: "r" (&(l->a.counter))
-	: "cc", "memory");
+	: "cc", "xer", "memory");
 
 	return t;
 }

arch/powerpc/include/asm/spinlock.h

@@ -277,7 +277,7 @@ static inline void __raw_read_unlock(raw_rwlock_t *rw)
 	bne-		1b"
 	: "=&r"(tmp)
 	: "r"(&rw->lock)
-	: "cr0", "memory");
+	: "cr0", "xer", "memory");
 }
 
 static inline void __raw_write_unlock(raw_rwlock_t *rw)