From patchwork Thu Jun 8 11:02:39 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 13272106 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 5B2E7C8300C for ; Thu, 8 Jun 2023 11:06:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236399AbjFHLGF (ORCPT ); Thu, 8 Jun 2023 07:06:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36168 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236340AbjFHLFF (ORCPT ); Thu, 8 Jun 2023 07:05:05 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:3::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EE75F359E; Thu, 8 Jun 2023 04:04:09 -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=BWc5z9HT4dUA9mjQNGkIg08JFiqviKFgFc2kwBdnmvA=; b=DSaSxe/TisXuiNZhOR1TgSi7tx 33lAtkUXPMOr9WQm9Z+HhNKEJGoeKJSluj7uhXRCmimH7VoHS0E0fvUNcZ7UiWxsb/tBtz6fXhZlr GE9jtxC+Q8FoQSEQz+4vk9nOOH8BTAjfrUuFLcHba2SvPuPGZNkEv8QjVxkATSDkihbdNi6umKqVB 7p2NEvk5EAeqwWcAKAwVWRbUBkG4tyEy/NutpgRnWrvU0mWTHAqNh1aG3veS9lJl/Zm3XwnRRN4uy kPNwBnK5dcXc2ETiMnCmg0liMCPKVYmWiFEJ6OPE/jhf6OnfgqyBEoO+PrWwml+/G7QKTlQlKNK+/ sLCUxnmg==; 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 1q7DQR-00921s-1m; Thu, 08 Jun 2023 11:03:31 +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, Hannes Reinecke Subject: [PATCH 11/30] swsusp: don't pass a stack address to blkdev_get_by_path Date: Thu, 8 Jun 2023 13:02:39 +0200 Message-Id: <20230608110258.189493-12-hch@lst.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230608110258.189493-1-hch@lst.de> References: <20230608110258.189493-1-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-scsi@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 Reviewed-by: Hannes Reinecke Acked-by: Rafael J. Wysocki --- 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);