From patchwork Tue Jun 6 07:39:31 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 690802 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 530A3C7EE33 for ; Tue, 6 Jun 2023 07:42:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234841AbjFFHmT (ORCPT ); Tue, 6 Jun 2023 03:42:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50650 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236585AbjFFHlN (ORCPT ); Tue, 6 Jun 2023 03:41:13 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:3::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1C937170F; Tue, 6 Jun 2023 00:40:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; 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=vuH0cWPL8qHtuuqoY6Ow8SnHOfsHuYxiebFIU5Vf46Y=; b=3gPyZfEi+OdaSn5VmdbupG3LdE ESR/D4Ih4YMaf5TrcYcrdr1iKuHbg7mHVbxmotTCJCjwUcIN6ltz8oKogCmiBJFkFZGJ8kPsghRbh TWinvG5H7TEa+HarFNp6UZSbc3tEXcMBHWVQ1GP3jRRitkjm/KcXsiaOXCtmEV195AoHZZxxqkieO h7dgImMUIPTgEiqoljO4DfPKzxS/byMfRFllHAhgYIdArocY4PtiqmCq6VjM4IVNdRy33rbKk4v8F uyeKYJM5THg16nwQo9n+6FWB16yCz9ARfw7yvzerq+icjLbXf8w/3uamxqF8+sOFJxaVfyHZ9+jdt kwsG8FQA==; Received: from 2a02-8389-2341-5b80-39d3-4735-9a3c-88d8.cable.dynamic.v6.surfer.at ([2a02:8389:2341:5b80:39d3:4735:9a3c:88d8] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1q6RIv-000ZBa-3D; Tue, 06 Jun 2023 07:40:34 +0000 From: Christoph Hellwig To: Jens Axboe Cc: Richard Weinberger , Josef Bacik , "Md. Haris Iqbal" , Jack Wang , Phillip Potter , Coly Li , Miquel Raynal , Vignesh Raghavendra , "Martin K. Petersen" , Chris Mason , David Sterba , Alexander Viro , Christian Brauner , "Rafael J. Wysocki" , Pavel Machek , dm-devel@redhat.com, linux-block@vger.kernel.org, linux-um@lists.infradead.org, linux-scsi@vger.kernel.org, linux-bcache@vger.kernel.org, linux-mtd@lists.infradead.org, linux-nvme@lists.infradead.org, linux-btrfs@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-nilfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-pm@vger.kernel.org Subject: [PATCH 12/31] swsusp: don't pass a stack address to blkdev_get_by_path Date: Tue, 6 Jun 2023 09:39:31 +0200 Message-Id: <20230606073950.225178-13-hch@lst.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230606073950.225178-1-hch@lst.de> References: <20230606073950.225178-1-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 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org holder is just an on-stack pointer that can easily be reused by other calls, replace it with a static variable that doesn't change. Signed-off-by: Christoph Hellwig --- kernel/power/swap.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/kernel/power/swap.c b/kernel/power/swap.c index 81aec3b2c60510..b03ff1a33c7f68 100644 --- a/kernel/power/swap.c +++ b/kernel/power/swap.c @@ -1510,6 +1510,8 @@ int swsusp_read(unsigned int *flags_p) return error; } +static void *swsusp_holder; + /** * swsusp_check - Check for swsusp signature in the resume device */ @@ -1517,14 +1519,13 @@ int swsusp_read(unsigned int *flags_p) int swsusp_check(bool snapshot_test) { int error; - void *holder; fmode_t mode = FMODE_READ; if (snapshot_test) mode |= FMODE_EXCL; hib_resume_bdev = blkdev_get_by_dev(swsusp_resume_device, - mode, &holder, NULL); + mode, &swsusp_holder, NULL); if (!IS_ERR(hib_resume_bdev)) { set_blocksize(hib_resume_bdev, PAGE_SIZE); clear_page(swsusp_header);