Commit 9f867457 authored Jul 15, 2014 by Martin Schwidefsky

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>

parent 666e68e0

arch/s390/include/asm/switch_to.h

+2 −2

Original line number	Diff line number	Diff line
		@@ -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));