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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>
This commit is contained in:
Theodore Ts'o 2009-11-22 07:44:56 -05:00
parent b7e57e7c2a
commit 4433871130
3 changed files with 26 additions and 49 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

38
fs/ext4/balloc.c
View File

@ -498,44 +498,6 @@ void ext4_add_groupblocks(handle_t *handle, struct super_block *sb,
return;
}
/**
* 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_free_blocks(handle_t *handle, struct inode *inode,
ext4_fsblk_t block, unsigned long count,
int metadata)
{
struct super_block *sb;
unsigned long dquot_freed_blocks;
/* this isn't the right place to decide whether block is metadata
* inode.c/extents.c knows better, but for safety ... */
if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode))
metadata = 1;
/* We need to make sure we don't reuse
* block released untill the transaction commit.
* writeback mode have weak data consistency so
* don't force data as metadata when freeing block
* for writeback mode.
*/
if (metadata == 0 && !ext4_should_writeback_data(inode))
metadata = 1;
sb = inode->i_sb;
ext4_mb_free_blocks(handle, inode, block, count,
metadata, &dquot_freed_blocks);
if (dquot_freed_blocks)
vfs_dq_free_block(inode, dquot_freed_blocks);
return;
}
/**
* ext4_has_free_blocks()
* @sbi: in-core super block structure.

7
fs/ext4/ext4.h
View File

@ -1325,8 +1325,6 @@ extern ext4_fsblk_t ext4_new_meta_blocks(handle_t *handle, struct inode *inode,
ext4_fsblk_t goal, unsigned long *count, int *errp);
extern int ext4_claim_free_blocks(struct ext4_sb_info *sbi, s64 nblocks);
extern int ext4_has_free_blocks(struct ext4_sb_info *sbi, s64 nblocks);
extern void ext4_free_blocks(handle_t *handle, struct inode *inode,
ext4_fsblk_t block, unsigned long count, int metadata);
extern void ext4_add_groupblocks(handle_t *handle, struct super_block *sb,
ext4_fsblk_t block, unsigned long count);
extern ext4_fsblk_t ext4_count_free_blocks(struct super_block *);
@ -1385,8 +1383,9 @@ extern int ext4_mb_reserve_blocks(struct super_block *, int);
extern void ext4_discard_preallocations(struct inode *);
extern int __init init_ext4_mballoc(void);
extern void exit_ext4_mballoc(void);
extern void ext4_mb_free_blocks(handle_t *, struct inode *,
ext4_fsblk_t, unsigned long, int, unsigned long *);
extern void ext4_free_blocks(handle_t *handle, struct inode *inode,
ext4_fsblk_t block, unsigned long count,
int metadata);
extern int ext4_mb_add_groupinfo(struct super_block *sb,
ext4_group_t i, struct ext4_group_desc *desc);
extern int ext4_mb_get_buddy_cache_lock(struct super_block *, ext4_group_t);

30
fs/ext4/mballoc.c
View File

@ -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 @@ void ext4_mb_free_blocks(handle_t *handle, struct inode *inode,
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 @@ void ext4_mb_free_blocks(handle_t *handle, struct inode *inode,
}
sb->s_dirt = 1;
error_return:
if (freed)
vfs_dq_free_block(inode, freed);
brelse(bitmap_bh);
ext4_std_error(sb, err);
if (ac)