From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964851AbbCMS32 (ORCPT ); Fri, 13 Mar 2015 14:29:28 -0400 Received: from mx1.redhat.com ([209.132.183.28]:49564 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1161092AbbCMS3Y (ORCPT ); Fri, 13 Mar 2015 14:29:24 -0400 Date: Fri, 13 Mar 2015 19:27:16 +0100 From: Oleg Nesterov To: Dave Hansen , Borislav Petkov , Ingo Molnar Cc: Andy Lutomirski , Linus Torvalds , Pekka Riikonen , Rik van Riel , Suresh Siddha , LKML , "Yu, Fenghua" , Quentin Casasnovas Subject: [PATCH 1/1] x86/cpu: don't allocate fpu->state for swapper/0 Message-ID: <20150313182716.GB8249@redhat.com> References: <54F74F59.5070107@intel.com> <20150313182656.GA8249@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20150313182656.GA8249@redhat.com> User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Now that kthreads do not use FPU until exec swpper/0 doesn't need to allocate fpu->state. Signed-off-by: Oleg Nesterov --- arch/x86/kernel/xsave.c | 2 -- 1 files changed, 0 insertions(+), 2 deletions(-) diff --git a/arch/x86/kernel/xsave.c b/arch/x86/kernel/xsave.c index dff0ec2..1cf5667 100644 --- a/arch/x86/kernel/xsave.c +++ b/arch/x86/kernel/xsave.c @@ -679,8 +679,6 @@ void xsave_init(void) static inline void __init eager_fpu_init_bp(void) { - current->thread.fpu.state = - alloc_bootmem_align(xstate_size, __alignof__(struct xsave_struct)); if (!init_xstate_buf) setup_init_fpu_buf(); } -- 1.5.5.1