From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751674AbeCTVb5 (ORCPT ); Tue, 20 Mar 2018 17:31:57 -0400 Received: from out30-130.freemail.mail.aliyun.com ([115.124.30.130]:54766 "EHLO out30-130.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751557AbeCTVbx (ORCPT ); Tue, 20 Mar 2018 17:31:53 -0400 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R151e4;CH=green;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01f04452;MF=yang.shi@linux.alibaba.com;NM=1;PH=DS;RN=9;SR=0;TI=SMTPD_---0SzoMu-x_1521581495; From: Yang Shi To: akpm@linux-foundation.org Cc: yang.shi@linux.alibaba.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Andy Lutomirski , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , x86@kernel.org Subject: [RFC PATCH 8/8] x86: vma: pass atomic parameter to do_munmap() Date: Wed, 21 Mar 2018 05:31:26 +0800 Message-Id: <1521581486-99134-9-git-send-email-yang.shi@linux.alibaba.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1521581486-99134-1-git-send-email-yang.shi@linux.alibaba.com> References: <1521581486-99134-1-git-send-email-yang.shi@linux.alibaba.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org It sounds unnecessary to release mmap_sem in the middle of unmmaping vdso map. This is API change only. Signed-off-by: Yang Shi Cc: Andy Lutomirski Cc: Thomas Gleixner Cc: Ingo Molnar Cc: "H. Peter Anvin" Cc: x86@kernel.org --- arch/x86/entry/vdso/vma.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/entry/vdso/vma.c b/arch/x86/entry/vdso/vma.c index 5b8b556..6359ae5 100644 --- a/arch/x86/entry/vdso/vma.c +++ b/arch/x86/entry/vdso/vma.c @@ -192,7 +192,7 @@ static int map_vdso(const struct vdso_image *image, unsigned long addr) if (IS_ERR(vma)) { ret = PTR_ERR(vma); - do_munmap(mm, text_start, image->size, NULL); + do_munmap(mm, text_start, image->size, NULL, true); } else { current->mm->context.vdso = (void __user *)text_start; current->mm->context.vdso_image = image; -- 1.8.3.1