From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BD83BC48BD6 for ; Thu, 27 Jun 2019 04:46:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8772B2187F for ; Thu, 27 Jun 2019 04:46:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1561610788; bh=6vzbfhIZQItZusxbZ3B57FOIszhglW9mEe2rAHhF5WM=; h=From:To:Cc:Subject:Date:List-ID:From; b=BqxeHV4ZnNh7DYljYEWNTNjibBdXBgPOzInh6uk0hMEEaqTGsZtTGVLu498spzhSe 0LJE7tg//zejVmpSdipiIEQstSifQxiY0k0+ImEWt2j5eacgn80SFNo923cDlWHEC8 Y9585prnfx1jX2gM7umxoLi3MnT4ySkWHiUTKhJ0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727027AbfF0Eq1 (ORCPT ); Thu, 27 Jun 2019 00:46:27 -0400 Received: from mail.kernel.org ([198.145.29.99]:57634 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725385AbfF0Eq1 (ORCPT ); Thu, 27 Jun 2019 00:46:27 -0400 Received: from localhost (c-67-180-165-146.hsd1.ca.comcast.net [67.180.165.146]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 73C7421855; Thu, 27 Jun 2019 04:46:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1561610786; bh=6vzbfhIZQItZusxbZ3B57FOIszhglW9mEe2rAHhF5WM=; h=From:To:Cc:Subject:Date:From; b=fAqrKeDD6m3OuCXa06TjEPKMTd3nBbvFSLBNgp8BK3LRGdkZrn/QAGhK9wUuM6QHU JLkYUtA+5Dkw2HqEtkzHGSlXADBsgBew5H3RrF7NZik1mL8rs4WIBwaH/0cOkqQ/Yz R8IMmQHPQWAijAv1G9zOUYktvvX4XfU58+MPJAng= From: Andy Lutomirski To: LKML Cc: x86@kernel.org, Kees Cook , Florian Weimer , Jann Horn , Andy Lutomirski , Palmer Dabbelt , Albert Ou , linux-riscv@lists.infradead.org Subject: [PATCH] riscv: Remove gate area stubs Date: Wed, 26 Jun 2019 21:46:18 -0700 Message-Id: X-Mailer: git-send-email 2.21.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Since commit a6c19dfe3994 ("arm64,ia64,ppc,s390,sh,tile,um,x86,mm: remove default gate area"), which predates riscv's inclusion in Linux by almost three years, the default behavior wrt the gate area is sane. Remove riscv's gate area stubs. Cc: Palmer Dabbelt Cc: Albert Ou Cc: linux-riscv@lists.infradead.org Signed-off-by: Andy Lutomirski --- arch/riscv/include/asm/page.h | 4 ---- arch/riscv/kernel/vdso.c | 19 ------------------- 2 files changed, 23 deletions(-) diff --git a/arch/riscv/include/asm/page.h b/arch/riscv/include/asm/page.h index 8ddb6c7fedac..d3e5f6c0c21a 100644 --- a/arch/riscv/include/asm/page.h +++ b/arch/riscv/include/asm/page.h @@ -115,8 +115,4 @@ extern unsigned long min_low_pfn; #include #include -/* vDSO support */ -/* We do define AT_SYSINFO_EHDR but don't use the gate mechanism */ -#define __HAVE_ARCH_GATE_AREA - #endif /* _ASM_RISCV_PAGE_H */ diff --git a/arch/riscv/kernel/vdso.c b/arch/riscv/kernel/vdso.c index a0084c36d270..c9c21e0d5641 100644 --- a/arch/riscv/kernel/vdso.c +++ b/arch/riscv/kernel/vdso.c @@ -92,22 +92,3 @@ const char *arch_vma_name(struct vm_area_struct *vma) return "[vdso]"; return NULL; } - -/* - * Function stubs to prevent linker errors when AT_SYSINFO_EHDR is defined - */ - -int in_gate_area_no_mm(unsigned long addr) -{ - return 0; -} - -int in_gate_area(struct mm_struct *mm, unsigned long addr) -{ - return 0; -} - -struct vm_area_struct *get_gate_vma(struct mm_struct *mm) -{ - return NULL; -} -- 2.21.0