[S390] clear_table inline assembly contraints
Tell the compile that the clear_table inline assembly writes to the
memory referenced by *s.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/include/asm/pgalloc.h b/arch/s390/include/asm/pgalloc.h
index f5b2bf3..b2658b9 100644
--- a/arch/s390/include/asm/pgalloc.h
+++ b/arch/s390/include/asm/pgalloc.h
@@ -28,6 +28,8 @@
static inline void clear_table(unsigned long *s, unsigned long val, size_t n)
{
+ typedef struct { char _[n]; } addrtype;
+
*s = val;
n = (n / 256) - 1;
asm volatile(
@@ -39,7 +41,8 @@
"0: mvc 256(256,%0),0(%0)\n"
" la %0,256(%0)\n"
" brct %1,0b\n"
- : "+a" (s), "+d" (n));
+ : "+a" (s), "+d" (n), "=m" (*(addrtype *) s)
+ : "m" (*(addrtype *) s));
}
static inline void crst_table_init(unsigned long *crst, unsigned long entry)