Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1042397AbdDVHBh (ORCPT ); Sat, 22 Apr 2017 03:01:37 -0400 Received: from mail.kernel.org ([198.145.29.136]:55536 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1042045AbdDVHBa (ORCPT ); Sat, 22 Apr 2017 03:01:30 -0400 From: Andy Lutomirski To: x86@kernel.org Cc: linux-kernel@vger.kernel.org, Borislav Petkov , Andy Lutomirski , Rik van Riel , Dave Hansen , Nadav Amit , Michal Hocko , Sasha Levin , Andrew Morton Subject: [PATCH v3 1/4] x86/vm86/32: Switch to flush_tlb_mm_range() in mark_screen_rdonly() Date: Sat, 22 Apr 2017 00:01:19 -0700 Message-Id: <791a644076fc3577ba7f7b7cafd643cc089baa7d.1492844372.git.luto@kernel.org> X-Mailer: git-send-email 2.9.3 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 996 Lines: 32 mark_screen_rdonly() is the last remaining caller of flush_tlb(). flush_tlb_mm_range() is potentially faster and isn't obsolete. Compile-tested only because I don't know whether software that uses this mechanism even exists. Cc: Rik van Riel Cc: Dave Hansen Cc: Nadav Amit Cc: Michal Hocko Cc: Sasha Levin Cc: Andrew Morton Signed-off-by: Andy Lutomirski --- arch/x86/kernel/vm86_32.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kernel/vm86_32.c b/arch/x86/kernel/vm86_32.c index 23ee89ce59a9..3eda76b3c835 100644 --- a/arch/x86/kernel/vm86_32.c +++ b/arch/x86/kernel/vm86_32.c @@ -193,7 +193,7 @@ static void mark_screen_rdonly(struct mm_struct *mm) pte_unmap_unlock(pte, ptl); out: up_write(&mm->mmap_sem); - flush_tlb(); + flush_tlb_mm_range(mm, 0xA0000, 0xA0000 + 32*PAGE_SIZE, 0UL); } -- 2.9.3