linux-ext4 - [PATCH 2/2] ext4: simple cleanup in fiemap codepath

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Date:	Tue, 20 Nov 2012 15:57:40 +0100
From:	Lukas Czerner <lczerner@...hat.com>
To:	linux-ext4@...r.kernel.org
Cc:	gnehzuil.liu@...il.com, tytso@....edu, dmonakhov@...nvz.org,
	bergwolf@...il.com, Lukas Czerner <lczerner@...hat.com>
Subject: [PATCH 2/2] ext4: simple cleanup in fiemap codepath

This commit is simple cleanup of fiemap codepath which has not been
included in previous commit to make the changes clearer. In this commit
we rename cbex variable to newex in ext4_fill_fiemap_extents() and more
importantly remove unnecessary condition in ext4_find_delayed_extent().

Signed-off-by: Lukas Czerner <lczerner@...hat.com>
---
 fs/ext4/extents.c |   28 ++++++++++++++--------------
 1 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index c7e3b58..ec34a0c 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -1967,7 +1967,7 @@ static int ext4_fill_fiemap_extents(struct inode *inode,
 				    struct fiemap_extent_info *fieinfo)
 {
 	struct ext4_ext_path *path = NULL;
-	struct ext4_ext_cache cbex;
+	struct ext4_ext_cache newex;
 	struct ext4_extent *ex;
 	ext4_lblk_t next, next_del, start = 0, end = 0;
 	ext4_lblk_t last = block + num;
@@ -2044,26 +2044,26 @@ static int ext4_fill_fiemap_extents(struct inode *inode,
 		BUG_ON(end <= start);
 
 		if (!exists) {
-			cbex.ec_block = start;
-			cbex.ec_len = end - start;
-			cbex.ec_start = 0;
+			newex.ec_block = start;
+			newex.ec_len = end - start;
+			newex.ec_start = 0;
 		} else {
-			cbex.ec_block = le32_to_cpu(ex->ee_block);
-			cbex.ec_len = ext4_ext_get_actual_len(ex);
-			cbex.ec_start = ext4_ext_pblock(ex);
+			newex.ec_block = le32_to_cpu(ex->ee_block);
+			newex.ec_len = ext4_ext_get_actual_len(ex);
+			newex.ec_start = ext4_ext_pblock(ex);
 			if (ext4_ext_is_uninitialized(ex))
 				flags |= FIEMAP_EXTENT_UNWRITTEN;
 		}
 
-		next_del = ext4_find_delayed_extent(inode, &cbex);
+		next_del = ext4_find_delayed_extent(inode, &newex);
 		if (next_del) {
 			exists = 1;
 			flags |= FIEMAP_EXTENT_DELALLOC;
 		}
 		up_read(&EXT4_I(inode)->i_data_sem);
 
-		if (unlikely(cbex.ec_len == 0)) {
-			EXT4_ERROR_INODE(inode, "cbex.ec_len == 0");
+		if (unlikely(newex.ec_len == 0)) {
+			EXT4_ERROR_INODE(inode, "newex.ec_len == 0");
 			err = -EIO;
 			break;
 		}
@@ -2084,9 +2084,9 @@ static int ext4_fill_fiemap_extents(struct inode *inode,
 
 		if (exists) {
 			err = fiemap_fill_next_extent(fieinfo,
-				(__u64)cbex.ec_block << blksize_bits,
-				(__u64)cbex.ec_start << blksize_bits,
-				(__u64)cbex.ec_len << blksize_bits,
+				(__u64)newex.ec_block << blksize_bits,
+				(__u64)newex.ec_start << blksize_bits,
+				(__u64)newex.ec_len << blksize_bits,
 				flags);
 			if (err < 0)
 				break;
@@ -2096,7 +2096,7 @@ static int ext4_fill_fiemap_extents(struct inode *inode,
 			}
 		}
 
-		block = cbex.ec_block + cbex.ec_len;
+		block = newex.ec_block + newex.ec_len;
 	}
 
 	if (path) {
-- 
1.7.7.6

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