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authorRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2015-11-06 16:31:51 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-11-06 17:50:42 -0800
commitb22580948c39d71fb150c1d53148a381011dd109 (patch)
tree559a5e2a46c8ebe8bdb48e8b23ff7700511cc739 /fs/nilfs2
parent18c41b37f0f16a0d6e5b1a73563d0c1333e7ef70 (diff)
downloadop-kernel-dev-b22580948c39d71fb150c1d53148a381011dd109.zip
op-kernel-dev-b22580948c39d71fb150c1d53148a381011dd109.tar.gz
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.c28
1 files changed, 9 insertions, 19 deletions
diff --git a/fs/nilfs2/alloc.c b/fs/nilfs2/alloc.c
index b15daf8..5b7ee36 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__,
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