From patchwork Tue Nov 1 19:54:08 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ross Zwisler X-Patchwork-Id: 9407895 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 9063A60721 for ; Tue, 1 Nov 2016 19:54:33 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7E022299DE for ; Tue, 1 Nov 2016 19:54:33 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 72BD529A7C; Tue, 1 Nov 2016 19:54:33 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 Received: from ml01.01.org (ml01.01.org [198.145.21.10]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 1C4A4299DE for ; Tue, 1 Nov 2016 19:54:33 +0000 (UTC) Received: from [127.0.0.1] (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id 4871381D46; Tue, 1 Nov 2016 12:54:30 -0700 (PDT) X-Original-To: linux-nvdimm@lists.01.org Delivered-To: linux-nvdimm@lists.01.org Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) (using TLSv1 with cipher CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id D854281D11 for ; Tue, 1 Nov 2016 12:54:28 -0700 (PDT) Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga103.fm.intel.com with ESMTP; 01 Nov 2016 12:54:30 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.31,433,1473145200"; d="scan'208";a="186453096" Received: from theros.lm.intel.com ([10.232.112.77]) by fmsmga004.fm.intel.com with ESMTP; 01 Nov 2016 12:54:29 -0700 From: Ross Zwisler To: linux-kernel@vger.kernel.org Subject: [PATCH v9 06/16] dax: consistent variable naming for DAX entries Date: Tue, 1 Nov 2016 13:54:08 -0600 Message-Id: <1478030058-1422-7-git-send-email-ross.zwisler@linux.intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1478030058-1422-1-git-send-email-ross.zwisler@linux.intel.com> References: <1478030058-1422-1-git-send-email-ross.zwisler@linux.intel.com> X-BeenThere: linux-nvdimm@lists.01.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: "Linux-nvdimm developer list." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Theodore Ts'o , Matthew Wilcox , Dave Chinner , linux-nvdimm@lists.01.org, Christoph Hellwig , linux-xfs@vger.kernel.org, linux-mm@kvack.org, Andreas Dilger , Alexander Viro , linux-fsdevel@vger.kernel.org, Jan Kara , linux-ext4@vger.kernel.org, Andrew Morton MIME-Version: 1.0 Errors-To: linux-nvdimm-bounces@lists.01.org Sender: "Linux-nvdimm" X-Virus-Scanned: ClamAV using ClamSMTP No functional change. Consistently use the variable name 'entry' instead of 'ret' for DAX radix tree entries. This was already happening in most of the code, so update get_unlocked_mapping_entry(), grab_mapping_entry() and dax_unlock_mapping_entry(). Signed-off-by: Ross Zwisler Reviewed-by: Christoph Hellwig Reviewed-by: Jan Kara --- fs/dax.c | 34 +++++++++++++++++----------------- 1 file changed, 17 insertions(+), 17 deletions(-) diff --git a/fs/dax.c b/fs/dax.c index 219fa2b..835e7f0 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -357,7 +357,7 @@ static inline void *unlock_slot(struct address_space *mapping, void **slot) static void *get_unlocked_mapping_entry(struct address_space *mapping, pgoff_t index, void ***slotp) { - void *ret, **slot; + void *entry, **slot; struct wait_exceptional_entry_queue ewait; wait_queue_head_t *wq = dax_entry_waitqueue(mapping, index); @@ -367,13 +367,13 @@ static void *get_unlocked_mapping_entry(struct address_space *mapping, ewait.key.index = index; for (;;) { - ret = __radix_tree_lookup(&mapping->page_tree, index, NULL, + entry = __radix_tree_lookup(&mapping->page_tree, index, NULL, &slot); - if (!ret || !radix_tree_exceptional_entry(ret) || + if (!entry || !radix_tree_exceptional_entry(entry) || !slot_locked(mapping, slot)) { if (slotp) *slotp = slot; - return ret; + return entry; } prepare_to_wait_exclusive(wq, &ewait.wait, TASK_UNINTERRUPTIBLE); @@ -396,13 +396,13 @@ static void *get_unlocked_mapping_entry(struct address_space *mapping, */ static void *grab_mapping_entry(struct address_space *mapping, pgoff_t index) { - void *ret, **slot; + void *entry, **slot; restart: spin_lock_irq(&mapping->tree_lock); - ret = get_unlocked_mapping_entry(mapping, index, &slot); + entry = get_unlocked_mapping_entry(mapping, index, &slot); /* No entry for given index? Make sure radix tree is big enough. */ - if (!ret) { + if (!entry) { int err; spin_unlock_irq(&mapping->tree_lock); @@ -410,10 +410,10 @@ static void *grab_mapping_entry(struct address_space *mapping, pgoff_t index) mapping_gfp_mask(mapping) & ~__GFP_HIGHMEM); if (err) return ERR_PTR(err); - ret = (void *)(RADIX_TREE_EXCEPTIONAL_ENTRY | + entry = (void *)(RADIX_TREE_EXCEPTIONAL_ENTRY | RADIX_DAX_ENTRY_LOCK); spin_lock_irq(&mapping->tree_lock); - err = radix_tree_insert(&mapping->page_tree, index, ret); + err = radix_tree_insert(&mapping->page_tree, index, entry); radix_tree_preload_end(); if (err) { spin_unlock_irq(&mapping->tree_lock); @@ -425,11 +425,11 @@ static void *grab_mapping_entry(struct address_space *mapping, pgoff_t index) /* Good, we have inserted empty locked entry into the tree. */ mapping->nrexceptional++; spin_unlock_irq(&mapping->tree_lock); - return ret; + return entry; } /* Normal page in radix tree? */ - if (!radix_tree_exceptional_entry(ret)) { - struct page *page = ret; + if (!radix_tree_exceptional_entry(entry)) { + struct page *page = entry; get_page(page); spin_unlock_irq(&mapping->tree_lock); @@ -442,9 +442,9 @@ static void *grab_mapping_entry(struct address_space *mapping, pgoff_t index) } return page; } - ret = lock_slot(mapping, slot); + entry = lock_slot(mapping, slot); spin_unlock_irq(&mapping->tree_lock); - return ret; + return entry; } void dax_wake_mapping_entry_waiter(struct address_space *mapping, @@ -469,11 +469,11 @@ void dax_wake_mapping_entry_waiter(struct address_space *mapping, void dax_unlock_mapping_entry(struct address_space *mapping, pgoff_t index) { - void *ret, **slot; + void *entry, **slot; spin_lock_irq(&mapping->tree_lock); - ret = __radix_tree_lookup(&mapping->page_tree, index, NULL, &slot); - if (WARN_ON_ONCE(!ret || !radix_tree_exceptional_entry(ret) || + entry = __radix_tree_lookup(&mapping->page_tree, index, NULL, &slot); + if (WARN_ON_ONCE(!entry || !radix_tree_exceptional_entry(entry) || !slot_locked(mapping, slot))) { spin_unlock_irq(&mapping->tree_lock); return;