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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>
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@ -205,7 +205,7 @@ static inline int xsch(struct subchannel_id schid)
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int ccode;
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asm volatile(
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" .insn rre,0xb2760000,%1,0\n"
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" xsch\n"
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" ipm %0\n"
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" srl %0,28"
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: "=d" (ccode)
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