From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932874AbcHXNqq (ORCPT ); Wed, 24 Aug 2016 09:46:46 -0400 Received: from terminus.zytor.com ([198.137.202.10]:49916 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755992AbcHXNpc (ORCPT ); Wed, 24 Aug 2016 09:45:32 -0400 Date: Wed, 24 Aug 2016 06:07:44 -0700 From: tip-bot for Brian Gerst Message-ID: Cc: linux-kernel@vger.kernel.org, dvlasenk@redhat.com, hpa@zytor.com, peterz@infradead.org, brgerst@gmail.com, luto@kernel.org, bp@alien8.de, jason.wessel@windriver.com, mingo@kernel.org, jpoimboe@redhat.com, tglx@linutronix.de, torvalds@linux-foundation.org Reply-To: mingo@kernel.org, bp@alien8.de, jason.wessel@windriver.com, luto@kernel.org, brgerst@gmail.com, peterz@infradead.org, hpa@zytor.com, linux-kernel@vger.kernel.org, dvlasenk@redhat.com, torvalds@linux-foundation.org, tglx@linutronix.de, jpoimboe@redhat.com In-Reply-To: <1471106302-10159-3-git-send-email-brgerst@gmail.com> References: <1471106302-10159-3-git-send-email-brgerst@gmail.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:x86/asm] sched/x86/64, kgdb: Clear GDB_PS on 64-bit Git-Commit-ID: 163630191ecb0dd9e4146d3c910045aba1cfeec1 X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 163630191ecb0dd9e4146d3c910045aba1cfeec1 Gitweb: http://git.kernel.org/tip/163630191ecb0dd9e4146d3c910045aba1cfeec1 Author: Brian Gerst AuthorDate: Sat, 13 Aug 2016 12:38:17 -0400 Committer: Ingo Molnar CommitDate: Wed, 24 Aug 2016 12:27:40 +0200 sched/x86/64, kgdb: Clear GDB_PS on 64-bit switch_to() no longer saves EFLAGS, so it's bogus to look for it on the stack. Set it to zero like 32-bit. Signed-off-by: Brian Gerst Reviewed-by: Josh Poimboeuf Cc: Andy Lutomirski Cc: Borislav Petkov Cc: Denys Vlasenko Cc: H. Peter Anvin Cc: Jason Wessel Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Link: http://lkml.kernel.org/r/1471106302-10159-3-git-send-email-brgerst@gmail.com Signed-off-by: Ingo Molnar --- arch/x86/kernel/kgdb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kernel/kgdb.c b/arch/x86/kernel/kgdb.c index fe649a5..5e3f294 100644 --- a/arch/x86/kernel/kgdb.c +++ b/arch/x86/kernel/kgdb.c @@ -176,7 +176,7 @@ void sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *p) gdb_regs[GDB_FS] = 0xFFFF; gdb_regs[GDB_GS] = 0xFFFF; #else - gdb_regs32[GDB_PS] = *(unsigned long *)(p->thread.sp + 8); + gdb_regs32[GDB_PS] = 0; gdb_regs32[GDB_CS] = __KERNEL_CS; gdb_regs32[GDB_SS] = __KERNEL_DS; gdb_regs[GDB_R8] = 0;