From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752949AbbCWMW6 (ORCPT ); Mon, 23 Mar 2015 08:22:58 -0400 Received: from terminus.zytor.com ([198.137.202.10]:41286 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752192AbbCWMW4 (ORCPT ); Mon, 23 Mar 2015 08:22:56 -0400 Date: Mon, 23 Mar 2015 05:22:35 -0700 From: tip-bot for Oleg Nesterov Message-ID: Cc: quentin.casasnovas@oracle.com, linux-kernel@vger.kernel.org, riel@redhat.com, torvalds@linux-foundation.org, priikone@iki.fi, oleg@redhat.com, bp@suse.de, sbsiddha@gmail.com, luto@amacapital.net, hpa@zytor.com, tglx@linutronix.de, mingo@kernel.org, dave.hansen@intel.com, fenghua.yu@intel.com Reply-To: torvalds@linux-foundation.org, priikone@iki.fi, oleg@redhat.com, linux-kernel@vger.kernel.org, riel@redhat.com, quentin.casasnovas@oracle.com, mingo@kernel.org, fenghua.yu@intel.com, dave.hansen@intel.com, luto@amacapital.net, bp@suse.de, sbsiddha@gmail.com, tglx@linutronix.de, hpa@zytor.com In-Reply-To: <20150313182716.GB8249@redhat.com> References: <20150313182716.GB8249@redhat.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:x86/fpu] x86/fpu: Don't allocate fpu->state for swapper/0 Git-Commit-ID: 4bd5bf8c85e6bca5be9e7c4b3d7ad1942ae323f3 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: 4bd5bf8c85e6bca5be9e7c4b3d7ad1942ae323f3 Gitweb: http://git.kernel.org/tip/4bd5bf8c85e6bca5be9e7c4b3d7ad1942ae323f3 Author: Oleg Nesterov AuthorDate: Fri, 13 Mar 2015 19:27:16 +0100 Committer: Ingo Molnar CommitDate: Mon, 23 Mar 2015 10:13:59 +0100 x86/fpu: Don't allocate fpu->state for swapper/0 Now that kthreads do not use FPU until they get executed, swapper/0 doesn't need to allocate fpu->state. Signed-off-by: Oleg Nesterov Signed-off-by: Borislav Petkov Cc: Andy Lutomirski Cc: Dave Hansen Cc: Fenghua Yu Cc: Linus Torvalds Cc: Pekka Riikonen Cc: Quentin Casasnovas Cc: Rik van Riel Cc: Suresh Siddha Link: http://lkml.kernel.org/r/20150313182716.GB8249@redhat.com Signed-off-by: Ingo Molnar --- arch/x86/kernel/xsave.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/arch/x86/kernel/xsave.c b/arch/x86/kernel/xsave.c index 65c29b0..ada8df7b 100644 --- a/arch/x86/kernel/xsave.c +++ b/arch/x86/kernel/xsave.c @@ -680,8 +680,6 @@ 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(); }