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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2008-12-25 13:39:26 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2008-12-25 13:39:15 +0100 |
| commit | 4f7e90d6d61fa0e56821787521c12f8a626c4037 (patch) | |
| tree | f6a43b8e2ea3f612ae0a0aaebb38b63a734c7d1f /arch/s390 | |
| parent | c185b783b0993c294ca22ad0a55e6cdf8df4f9d3 (diff) | |
[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>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/include/asm/pgalloc.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/s390/include/asm/pgalloc.h b/arch/s390/include/asm/pgalloc.h index f5b2bf3d7c1..b2658b9220f 100644 --- a/arch/s390/include/asm/pgalloc.h +++ b/arch/s390/include/asm/pgalloc.h @@ -28,6 +28,8 @@ void disable_noexec(struct mm_struct *, struct task_struct *); 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 @@ static inline void clear_table(unsigned long *s, unsigned long val, size_t n) "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) |