tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
[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>
+4
-1
+4
-1
arch/s390/include/asm/pgalloc.h
+4
-1
arch/s390/include/asm/pgalloc.h
···
28
28
29
29
static inline void clear_table(unsigned long *s, unsigned long val, size_t n)
30
30
{
31
+
typedef struct { char _[n]; } addrtype;
32
+
31
33
*s = val;
32
34
n = (n / 256) - 1;
33
35
asm volatile(
···
41
39
"0: mvc 256(256,%0),0(%0)\n"
42
40
" la %0,256(%0)\n"
43
41
" brct %1,0b\n"
44
-
: "+a" (s), "+d" (n));
42
+
: "+a" (s), "+d" (n), "=m" (*(addrtype *) s)
43
+
: "m" (*(addrtype *) s));
45
44
}
46
45
47
46
static inline void crst_table_init(unsigned long *crst, unsigned long entry)