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| author |   Peter Oberparleiter <peter.oberparleiter@de.ibm.com> | 2007-03-26 20:42:38 +0200 |
|---|---|---|
| committer |   Heiko Carstens <heiko.carstens@de.ibm.com> | 2007-03-26 20:43:46 +0200 |
| commit | 04439694ea82fed62a97fd474147966381201954 (patch) | |
| tree | 7b1c4baee12f7dc3eeb41f8c0782539ad2152c5e /drivers/s390 | |
| parent | Linux 2.6.21-rc5 (diff) | |
| download | linux-dev-04439694ea82fed62a97fd474147966381201954.tar.xz linux-dev-04439694ea82fed62a97fd474147966381201954.zip | |
[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>
Diffstat (limited to 'drivers/s390')
| -rw-r--r-- | drivers/s390/block/dasd_diag.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/s390/block/dasd_diag.c b/drivers/s390/block/dasd_diag.c index ab782bb46ac1..e810e4a44ed4 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; } |