Commit 4734406c authored by Heiko Carstens's avatar Heiko Carstens Committed by Vasily Gorbik
Browse files

s390/fpu: Re-add exception handling in load_fpu_state() 



With the recent rewrite of the fpu code exception handling for the
lfpc instruction within load_fpu_state() was erroneously removed.

Add it again to prevent that loading invalid floating point register
values cause an unhandled specification exception.

Fixes: 8c09871a ("s390/fpu: limit save and restore to used registers")
Cc: stable@vger.kernel.org
Reported-by: default avatarAristeu Rozanski <aris@redhat.com>
Tested-by: default avatarAristeu Rozanski <aris@redhat.com>
Reviewed-by: default avatarVasily Gorbik <gor@linux.ibm.com>
Signed-off-by: default avatarHeiko Carstens <hca@linux.ibm.com>
Signed-off-by: default avatarVasily Gorbik <gor@linux.ibm.com>
parent 8400291e

arch/s390/kernel/fpu.c

+1 −1
Original line number Diff line number Diff line
@@ -113,7 +113,7 @@ void load_fpu_state(struct fpu *state, int flags) 
	int mask;



	if (flags & KERNEL_FPC)

		fpu_lfpc(&state->fpc);

		fpu_lfpc_safe(&state->fpc);

	if (!cpu_has_vx()) {

		if (flags & KERNEL_VXR_V0V7)

			load_fp_regs_vx(state->vxrs);