ext4: fold ext4_free_blocks() and ext4_mb_free_blocks()

ext4_mb_free_blocks() is only called by ext4_free_blocks(), and the
latter function doesn't really do much.  So merge the two functions
together, such that ext4_free_blocks() is now found in
fs/ext4/mballoc.c.  This saves about 200 bytes of compiled text space.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

1 files changed, 23 insertions, 7 deletions

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 6e5a23a2cc25..0dca90be1afb 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -4427,18 +4427,24 @@ ext4_mb_free_metadata(handle_t *handle, struct ext4_buddy *e4b,
 	return 0;
 }
 
-/*
- * Main entry point into mballoc to free blocks
+/**
+ * ext4_free_blocks() -- Free given blocks and update quota
+ * @handle:		handle for this transaction
+ * @inode:		inode
+ * @block:		start physical block to free
+ * @count:		number of blocks to count
+ * @metadata: 		Are these metadata blocks
  */
-void ext4_mb_free_blocks(handle_t *handle, struct inode *inode,
-			ext4_fsblk_t block, unsigned long count,
-			int metadata, unsigned long *freed)
+void ext4_free_blocks(handle_t *handle, struct inode *inode,
+		      ext4_fsblk_t block, unsigned long count,
+		      int metadata)
 {
 	struct buffer_head *bitmap_bh = NULL;
 	struct super_block *sb = inode->i_sb;
 	struct ext4_allocation_context *ac = NULL;
 	struct ext4_group_desc *gdp;
 	struct ext4_super_block *es;
+	unsigned long freed = 0;
 	unsigned int overflow;
 	ext4_grpblk_t bit;
 	struct buffer_head *gd_bh;
@@ -4448,7 +4454,15 @@ void ext4_mb_free_blocks(handle_t *handle, struct inode *inode,
 	int err = 0;
 	int ret;
 
-	*freed = 0;
+	/* 
+	 * We need to make sure we don't reuse the freed block until
+	 * after the transaction is committed, which we can do by
+	 * treating the block as metadata, below.  We make an
+	 * exception if the inode is to be written in writeback mode
+	 * since writeback mode has weak data consistency guarantees.
+	 */
+	if (!ext4_should_writeback_data(inode))
+		metadata = 1;
 
 	sbi = EXT4_SB(sb);
 	es = EXT4_SB(sb)->s_es;
@@ -4577,7 +4591,7 @@ do_more:
 
 	ext4_mb_release_desc(&e4b);
 
-	*freed += count;
+	freed += count;
 
 	/* We dirtied the bitmap block */
 	BUFFER_TRACE(bitmap_bh, "dirtied bitmap block");
@@ -4597,6 +4611,8 @@ do_more:
 	}
 	sb->s_dirt = 1;
 error_return:
+	if (freed)
+		vfs_dq_free_block(inode, freed);
 	brelse(bitmap_bh);
 	ext4_std_error(sb, err);
 	if (ac)