From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ot0-f197.google.com (mail-ot0-f197.google.com [74.125.82.197]) by kanga.kvack.org (Postfix) with ESMTP id 66A6A6B0009 for ; Tue, 20 Mar 2018 17:32:12 -0400 (EDT) Received: by mail-ot0-f197.google.com with SMTP id i9-v6so1738465oth.3 for ; Tue, 20 Mar 2018 14:32:12 -0700 (PDT) Received: from out30-132.freemail.mail.aliyun.com (out30-132.freemail.mail.aliyun.com. [115.124.30.132]) by mx.google.com with ESMTPS id x2-v6si380748otd.114.2018.03.20.14.32.10 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 20 Mar 2018 14:32:11 -0700 (PDT) From: Yang Shi 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> 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: owner-linux-mm@kvack.org List-ID: 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 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