From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760755AbbEEQ2J (ORCPT ); Tue, 5 May 2015 12:28:09 -0400 Received: from mail-wg0-f52.google.com ([74.125.82.52]:36087 "EHLO mail-wg0-f52.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760705AbbEEQ17 (ORCPT ); Tue, 5 May 2015 12:27:59 -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 009/208] x86/fpu: Optimize fpu__unlazy_stopped() Date: Tue, 5 May 2015 18:23:49 +0200 Message-Id: <1430843228-13749-10-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 This function is only called for stopped child tasks, so the fpu__save() branch will never get called - remove it. 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 | 2 -- 1 file changed, 2 deletions(-) diff --git a/arch/x86/kernel/i387.c b/arch/x86/kernel/i387.c index 909d10d2fb70..76006a701dbb 100644 --- a/arch/x86/kernel/i387.c +++ b/arch/x86/kernel/i387.c @@ -291,8 +291,6 @@ static int fpu__unlazy_stopped(struct task_struct *child) return -EINVAL; if (tsk_used_math(child)) { - if (cpu_has_fpu && child == current) - fpu__save(child); task_disable_lazy_fpu_restore(child); return 0; } -- 2.1.0