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| author | Peter Oberparleiter <oberpar@linux.vnet.ibm.com> | 2015-12-18 14:59:28 +0300 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2015-12-18 16:59:34 +0300 |
| commit | ac357c4105ef6b2d44227aa349850a3c1a2994a5 (patch) | |
| tree | 6f9a2c457964f50c5472a6ba1bfcbf5ec7152be2 /drivers/s390/cio | |
| parent | 62e65da994768e0d599d78dd2cebef5716ffb0ae (diff) | |
| download | linux-ac357c4105ef6b2d44227aa349850a3c1a2994a5.tar.xz | |
s390/cio: Fix incorrect xsch opcode specification
The numeric representation of the xsch instruction was incorrectly
specified, resulting in reserved fields of the instruction opcode
potentially being set to a non-zero value. While this doesn't currently
cause any problem, a future architecture might make use of these fields
so that the current specification could result in an exception or
unwanted side-effects.
Fix this by using the xsch instruction code for which support in
binutils was added in 2003.
Signed-off-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/cio')
| -rw-r--r-- | drivers/s390/cio/io_sch.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/s390/cio/io_sch.h b/drivers/s390/cio/io_sch.h index b108f4a5c7dd..789ce783d3e1 100644 --- a/drivers/s390/cio/io_sch.h +++ b/drivers/s390/cio/io_sch.h @@ -205,7 +205,7 @@ static inline int xsch(struct subchannel_id schid) int ccode; asm volatile( - " .insn rre,0xb2760000,%1,0\n" + " xsch\n" " ipm %0\n" " srl %0,28" : "=d" (ccode) |