diff options
| author |   Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> | 2015-11-06 16:31:51 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2015-11-06 17:50:42 -0800 |
| commit | b22580948c39d71fb150c1d53148a381011dd109 (patch) | |
| tree | 559a5e2a46c8ebe8bdb48e8b23ff7700511cc739 /fs/nilfs2 | |
| parent | nilfs2: refactor nilfs_palloc_find_available_slot() (diff) | |
| download | linux-dev-b22580948c39d71fb150c1d53148a381011dd109.tar.xz linux-dev-b22580948c39d71fb150c1d53148a381011dd109.zip | |
nilfs2: get rid of nilfs_palloc_group_is_in()
This unfolds nilfs_palloc_group_is_in() helper function into
nilfs_palloc_freev() function to simplify a range check and an index
calculation repeatedy performed in a loop of the function.
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/nilfs2')
| -rw-r--r-- | fs/nilfs2/alloc.c | 28 |
1 files changed, 9 insertions, 19 deletions
diff --git a/fs/nilfs2/alloc.c b/fs/nilfs2/alloc.c index b15daf871f99..5b7ee36f84c7 100644 --- a/fs/nilfs2/alloc.c +++ b/fs/nilfs2/alloc.c @@ -673,22 +673,6 @@ void nilfs_palloc_abort_free_entry(struct inode *inode, } /** - * nilfs_palloc_group_is_in - judge if an entry is in a group - * @inode: inode of metadata file using this allocator - * @group: group number - * @nr: serial number of the entry (e.g. inode number) - */ -static int -nilfs_palloc_group_is_in(struct inode *inode, unsigned long group, __u64 nr) -{ - __u64 first, last; - - first = group * nilfs_palloc_entries_per_group(inode); - last = first + nilfs_palloc_entries_per_group(inode) - 1; - return (nr >= first) && (nr <= last); -} - -/** * nilfs_palloc_freev - deallocate a set of persistent objects * @inode: inode of metadata file using this allocator * @entry_nrs: array of entry numbers to be deallocated @@ -701,6 +685,8 @@ int nilfs_palloc_freev(struct inode *inode, __u64 *entry_nrs, size_t nitems) unsigned char *bitmap; void *desc_kaddr, *bitmap_kaddr; unsigned long group, group_offset; + __u64 group_min_nr; + const unsigned long epg = nilfs_palloc_entries_per_group(inode); spinlock_t *lock; int i, j, n, ret; @@ -715,6 +701,10 @@ int nilfs_palloc_freev(struct inode *inode, __u64 *entry_nrs, size_t nitems) brelse(desc_bh); return ret; } + + /* Get the first entry number of the group */ + group_min_nr = (__u64)group * epg; + desc_kaddr = kmap(desc_bh->b_page); desc = nilfs_palloc_block_get_group_desc( inode, group, desc_bh, desc_kaddr); @@ -722,10 +712,10 @@ int nilfs_palloc_freev(struct inode *inode, __u64 *entry_nrs, size_t nitems) bitmap = bitmap_kaddr + bh_offset(bitmap_bh); lock = nilfs_mdt_bgl_lock(inode, group); for (j = i, n = 0; - (j < nitems) && nilfs_palloc_group_is_in(inode, group, - entry_nrs[j]); + j < nitems && entry_nrs[j] >= group_min_nr && + entry_nrs[j] < group_min_nr + epg; j++) { - nilfs_palloc_group(inode, entry_nrs[j], &group_offset); + group_offset = entry_nrs[j] - group_min_nr; if (!nilfs_clear_bit_atomic(lock, group_offset, bitmap)) { nilfs_warning(inode->i_sb, __func__, |