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authorPeter Oberparleiter <peter.oberparleiter@de.ibm.com>2007-03-26 20:42:38 +0200
committerHeiko Carstens <heiko.carstens@de.ibm.com>2007-03-26 20:43:46 +0200
commit04439694ea82fed62a97fd474147966381201954 (patch)
tree7b1c4baee12f7dc3eeb41f8c0782539ad2152c5e
parente0f2e3a06be513352cb4955313ed7e55909acd84 (diff)
downloadop-kernel-dev-04439694ea82fed62a97fd474147966381201954.zip
op-kernel-dev-04439694ea82fed62a97fd474147966381201954.tar.gz
[S390] dasd: Work around gcc bug.
gcc incorrectly removes initialization of register 0 in dasd diag inline assembly. Use different register to work around this compiler bug. Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
-rw-r--r--drivers/s390/block/dasd_diag.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/s390/block/dasd_diag.c b/drivers/s390/block/dasd_diag.c
index ab782bb..e810e4a 100644
--- a/drivers/s390/block/dasd_diag.c
+++ b/drivers/s390/block/dasd_diag.c
@@ -65,7 +65,7 @@ static const u8 DASD_DIAG_CMS1[] = { 0xc3, 0xd4, 0xe2, 0xf1 };/* EBCDIC CMS1 */
* resulting condition code and DIAG return code. */
static inline int dia250(void *iob, int cmd)
{
- register unsigned long reg0 asm ("0") = (unsigned long) iob;
+ register unsigned long reg2 asm ("2") = (unsigned long) iob;
typedef union {
struct dasd_diag_init_io init_io;
struct dasd_diag_rw_io rw_io;
@@ -74,15 +74,15 @@ static inline int dia250(void *iob, int cmd)
rc = 3;
asm volatile(
- " diag 0,%2,0x250\n"
+ " diag 2,%2,0x250\n"
"0: ipm %0\n"
" srl %0,28\n"
- " or %0,1\n"
+ " or %0,3\n"
"1:\n"
EX_TABLE(0b,1b)
: "+d" (rc), "=m" (*(addr_type *) iob)
- : "d" (cmd), "d" (reg0), "m" (*(addr_type *) iob)
- : "1", "cc");
+ : "d" (cmd), "d" (reg2), "m" (*(addr_type *) iob)
+ : "3", "cc");
return rc;
}
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