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s390: fix restore of invalid floating-point-control 

The fixup of the inline assembly to restore the floating-point-control
register needs to check for instruction address *after* the lfcp
instruction as the specification and data exceptions are suppresssing.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Martin Schwidefsky 2014-07-15 10:41:37 +02:00
parent 666e68e0dd
commit 9f86745722
1 changed files with 2 additions and 2 deletions
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4
arch/s390/include/asm/switch_to.h
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@ -51,8 +51,8 @@ static inline int restore_fp_ctl(u32 *fpc)
return 0;
asm volatile(
"0: lfpc %1\n"
" la %0,0\n"
" lfpc %1\n"
"0: la %0,0\n"
"1:\n"
EX_TABLE(0b,1b)
: "=d" (rc) : "Q" (*fpc), "0" (-EINVAL));