From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760738AbbEEQ2H (ORCPT ); Tue, 5 May 2015 12:28:07 -0400 Received: from mail-wg0-f45.google.com ([74.125.82.45]:35551 "EHLO mail-wg0-f45.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760717AbbEEQ2A (ORCPT ); Tue, 5 May 2015 12:28:00 -0400 From: Ingo Molnar To: linux-kernel@vger.kernel.org Cc: Andy Lutomirski , Borislav Petkov , Dave Hansen , Fenghua Yu , "H. Peter Anvin" , Linus Torvalds , Oleg Nesterov , Thomas Gleixner Subject: [PATCH 010/208] x86/fpu: Simplify fpu__unlazy_stopped() Date: Tue, 5 May 2015 18:23:50 +0200 Message-Id: <1430843228-13749-11-git-send-email-mingo@kernel.org> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1430843228-13749-1-git-send-email-mingo@kernel.org> References: <1430843228-13749-1-git-send-email-mingo@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Open code the PF_USED_MATH logic, to make the logic more obvious. (We'll slowly convert the other users of *_used_math() methods as well.) Reviewed-by: Borislav Petkov Cc: Andy Lutomirski Cc: Dave Hansen Cc: Fenghua Yu Cc: H. Peter Anvin Cc: Linus Torvalds Cc: Oleg Nesterov Cc: Thomas Gleixner Signed-off-by: Ingo Molnar --- arch/x86/kernel/i387.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/x86/kernel/i387.c b/arch/x86/kernel/i387.c index 76006a701dbb..5e4dae70ffa5 100644 --- a/arch/x86/kernel/i387.c +++ b/arch/x86/kernel/i387.c @@ -290,7 +290,7 @@ static int fpu__unlazy_stopped(struct task_struct *child) if (WARN_ON_ONCE(child == current)) return -EINVAL; - if (tsk_used_math(child)) { + if (child->flags & PF_USED_MATH) { task_disable_lazy_fpu_restore(child); return 0; } @@ -304,7 +304,9 @@ static int fpu__unlazy_stopped(struct task_struct *child) fpu_finit(&child->thread.fpu); - set_stopped_child_used_math(child); + /* Safe to do for stopped child tasks: */ + child->flags |= PF_USED_MATH; + return 0; } -- 2.1.0