From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Hellwig 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> References: <20230606073950.225178-1-hch@lst.de> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sourceforge.net; s=x; 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:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=vuH0cWPL8qHtuuqoY6Ow8SnHOfsHuYxiebFIU5Vf46Y=; b=T53gW13soRNwiaQeOgwW9MfNx5 2brUrzwBNKbVTISF8wmzsTNd0ifuSbqS/Ztk6lhg1qweuIWDbbVMmsYtDaDhpzTzZlQMgxYVrNs+v WSCsnxBVuxHbtBW8WBKB0JVsr3CxRaVv3rqevQPwdhDvU7yJBP46OgtAgvub5NDYyEKo=; DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sf.net; s=x ; 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:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=vuH0cWPL8qHtuuqoY6Ow8SnHOfsHuYxiebFIU5Vf46Y=; b=CgPVp63qbT7QB1w4TgtegFzx3G MEvvV85QCfvi3OpebsE1+iaDvM/dbtpy+fVzmAWcoyi1tZ/iwD9OYNjp1vAx1cyoWP9eEo3sO34jT bJk+u1JNuNcPZeMzGOTRvYp+8oiBvIMQKORxFklyaFWsQxddarkh+G+hJfIUVNWARtbM=; 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==; In-Reply-To: <20230606073950.225178-1-hch@lst.de> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net To: Jens Axboe Cc: Vignesh Raghavendra , "Rafael J. Wysocki" , linux-nvme@lists.infradead.org, Phillip Potter , Chris Mason , dm-devel@redhat.com, "Md. Haris Iqbal" , Pavel Machek , Miquel Raynal , Jack Wang , linux-nilfs@vger.kernel.org, linux-scsi@vger.kernel.org, Richard Weinberger , linux-pm@vger.kernel.org, linux-um@lists.infradead.org, Josef Bacik , Coly Li , linux-block@vger.kernel.org, linux-bcache@vger.kernel.org, Alexander Viro , David Sterba , Christian Brauner , "Martin K. Petersen" , linux-f2fs-devel@lists.sourceforge.net, linux-fsdevel@vger.kernel.org, linux-mtd@lists.infradead. 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); -- 2.39.2