linux-kernel - [PATCH 4/7] dax: rename 'ret' to 'entry' in grab_mapping

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Message-Id: <20160815190918.20672-5-ross.zwisler@linux.intel.com>
Date:	Mon, 15 Aug 2016 13:09:15 -0600
From:	Ross Zwisler <ross.zwisler@...ux.intel.com>
To:	linux-kernel@...r.kernel.org
Cc:	Ross Zwisler <ross.zwisler@...ux.intel.com>,
	"Theodore Ts'o" <tytso@....edu>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	Andreas Dilger <adilger.kernel@...ger.ca>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Dan Williams <dan.j.williams@...el.com>,
	Dave Chinner <david@...morbit.com>, Jan Kara <jack@...e.com>,
	linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	linux-mm@...ck.org, linux-nvdimm@...ts.01.org
Subject: [PATCH 4/7] dax: rename 'ret' to 'entry' in grab_mapping_entry

No functional change.

Everywhere else that we get entries via get_unlocked_mapping_entry(), we
save it in 'entry' variables.  Just change this to be more descriptive.

Signed-off-by: Ross Zwisler <ross.zwisler@...ux.intel.com>
---
 fs/dax.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/fs/dax.c b/fs/dax.c
index 8030f93..fed6a52 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -394,13 +394,13 @@ 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);
@@ -408,10 +408,10 @@ restart:
 				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);
@@ -423,11 +423,11 @@ restart:
 		/* 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);
@@ -440,9 +440,9 @@ restart:
 		}
 		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,
-- 
2.9.0