From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail333.us4.mandrillapp.com ([205.201.137.77]:33573 "EHLO mail333.us4.mandrillapp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752931AbcCASgv (ORCPT ); Tue, 1 Mar 2016 13:36:51 -0500 Received: from pmta03.dal05.mailchimp.com (127.0.0.1) by mail333.us4.mandrillapp.com id hqngk6174noj for ; Tue, 1 Mar 2016 18:36:50 +0000 (envelope-from ) From: Subject: Patch "s390/fpu: signals vs. floating point control register" has been added to the 4.4-stable tree To: , Cc: , Message-Id: <145685740859178@kroah.com> Date: Tue, 01 Mar 2016 18:36:50 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled s390/fpu: signals vs. floating point control register to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: s390-fpu-signals-vs.-floating-point-control-register.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 1b17cb796f5d40ffa239c6926385abd83a77a49b Mon Sep 17 00:00:00 2001 From: Martin Schwidefsky Date: Fri, 19 Feb 2016 15:29:05 +0100 Subject: s390/fpu: signals vs. floating point control register From: Martin Schwidefsky commit 1b17cb796f5d40ffa239c6926385abd83a77a49b upstream. git commit 904818e2f229f3d94ec95f6932a6358c81e73d78 "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: Martin Schwidefsky Signed-off-by: Greg Kroah-Hartman --- arch/s390/include/asm/fpu/internal.h | 2 ++ 1 file changed, 2 insertions(+) --- a/arch/s390/include/asm/fpu/internal.h +++ b/arch/s390/include/asm/fpu/internal.h @@ -48,6 +48,7 @@ static inline void convert_fp_to_vx(__ve 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 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 Patches currently in stable-queue which might be from schwidefsky@de.ibm.com are queue-4.4/s390-kvm-remove-dependency-on-struct-save_area-definition.patch queue-4.4/s390-fix-normalization-bug-in-exception-table-sorting.patch queue-4.4/s390-dasd-prevent-incorrect-length-error-under-z-vm-after-pav-changes.patch queue-4.4/s390-fpu-signals-vs.-floating-point-control-register.patch queue-4.4/s390-dasd-fix-refcount-for-pav-reassignment.patch queue-4.4/s390-compat-correct-restore-of-high-gprs-on-signal-return.patch queue-4.4/s390-dasd-fix-performance-drop.patch