From patchwork Fri May 15 14:36:42 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11551995 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 3DA96739 for ; Fri, 15 May 2020 14:39:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 271FC2075F for ; Fri, 15 May 2020 14:39:03 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="mJPHNJDn" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728166AbgEOOiV (ORCPT ); Fri, 15 May 2020 10:38:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35808 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1728138AbgEOOiS (ORCPT ); Fri, 15 May 2020 10:38:18 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9F7C8C061A0C; Fri, 15 May 2020 07:38:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=oCdrIxNzR4NHS2NDYxpGK2EFu2WHsVdB0VGTwPSxhuk=; b=mJPHNJDn7vFUrE0crP3cr8ZzuE wkVffsLiZuIGA8DyS86CQKhqkAJmrbIV79qGCT9sR+Rl9E7kPvEf6/IGi4QZ5ZeBa8oUZ2OdE2uqp NIGBkGKr7vj38kjV+3P4R/5Upo6eYECYe4dngZlN41KLcHjMY4GqMSsFw9tAthizDHt0gErnL+PpQ 6k8bABtYmtroZOVh0f+uMAeOgfWaZNSub+AckrAKYXUlwpg4Otebfh0aSe8SKQ9lNDRUAr5dfnnMX tzyi1w5krYiX0Wtq2wKUwqQZbSMoWdBcEid3w0GZLDxCxqTV7vO8GAj1NSzGxp7Fh8g5uuMGJMcq0 NFxMXPnw==; Received: from [2001:4bb8:188:1506:c70:4a89:bc61:2] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1jZbTQ-0005B1-5T; Fri, 15 May 2020 14:38:04 +0000 From: Christoph Hellwig To: Andrew Morton , Arnd Bergmann , Roman Zippel Cc: Jessica Yu , Michal Simek , x86@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-c6x-dev@linux-c6x.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-um@lists.infradead.org, linux-xtensa@linux-xtensa.org, linux-fsdevel@vger.kernel.org Subject: [PATCH 25/29] exec: only build read_code when needed Date: Fri, 15 May 2020 16:36:42 +0200 Message-Id: <20200515143646.3857579-26-hch@lst.de> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200515143646.3857579-1-hch@lst.de> References: <20200515143646.3857579-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org Only build read_code when binary formats that use it are built into the kernel. Signed-off-by: Christoph Hellwig --- fs/exec.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/exec.c b/fs/exec.c index 06b4c550af5d9..a4f766f296f8f 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -1027,6 +1027,8 @@ int kernel_read_file_from_fd(int fd, void **buf, loff_t *size, loff_t max_size, } EXPORT_SYMBOL_GPL(kernel_read_file_from_fd); +#if defined(CONFIG_HAVE_AOUT) || defined(CONFIG_BINFMT_FLAT) || \ + defined(CONFIG_BINFMT_ELF_FDPIC) ssize_t read_code(struct file *file, unsigned long addr, loff_t pos, size_t len) { ssize_t res = vfs_read(file, (void __user *)addr, len, &pos); @@ -1035,6 +1037,7 @@ ssize_t read_code(struct file *file, unsigned long addr, loff_t pos, size_t len) return res; } EXPORT_SYMBOL(read_code); +#endif /* * Maps the mm_struct mm into the current task struct.