Commit caa2a2b5 authored by Martin Schwidefsky's avatar Martin Schwidefsky Committed by Greg Kroah-Hartman

s390/fpu: signals vs. floating point control register

commit 1b17cb79 upstream.

git commit 904818e2
"s390/kernel: introduce fpu-internal.h with fpu helper functions"
introduced the fpregs_store / fp_regs_load helper. These function
fail to save and restore the floating pointer control registers.

The effect is that the FPC is not correctly handled on signal
delivery and signal return.
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent d7032508
......@@ -48,6 +48,7 @@ static inline void convert_fp_to_vx(__vector128 *vxrs, freg_t *fprs)
static inline void fpregs_store(_s390_fp_regs *fpregs, struct fpu *fpu)
{
fpregs->pad = 0;
fpregs->fpc = fpu->fpc;
if (MACHINE_HAS_VX)
convert_vx_to_fp((freg_t *)&fpregs->fprs, fpu->vxrs);
else
......@@ -57,6 +58,7 @@ static inline void fpregs_store(_s390_fp_regs *fpregs, struct fpu *fpu)
static inline void fpregs_load(_s390_fp_regs *fpregs, struct fpu *fpu)
{
fpu->fpc = fpregs->fpc;
if (MACHINE_HAS_VX)
convert_fp_to_vx(fpu->vxrs, (freg_t *)&fpregs->fprs);
else
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment