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authorRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2010-12-27 00:03:02 +0900
committerRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2011-01-10 14:05:46 +0900
commita7a8447edef2cfa9b28cc3892993d9fafb362671 (patch)
tree85fc226757b9e2358e226f55271566c2d0c281e8 /fs/nilfs2/mdt.c
parent888da23c2f70ca2e9897b725322a6456285ee9c4 (diff)
downloadlinux-a7a8447edef2cfa9b28cc3892993d9fafb362671.tar.gz
nilfs2: simplify nilfs_mdt_freeze_buffer
nilfs_page_get_nth_block() function used in nilfs_mdt_freeze_buffer() always returns a valid buffer head, so its validity check can be removed. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Diffstat (limited to 'fs/nilfs2/mdt.c')
-rw-r--r--fs/nilfs2/mdt.c26
1 files changed, 12 insertions, 14 deletions
diff --git a/fs/nilfs2/mdt.c b/fs/nilfs2/mdt.c
index f5d4b184eaf..6a0e2a189f6 100644
--- a/fs/nilfs2/mdt.c
+++ b/fs/nilfs2/mdt.c
@@ -493,31 +493,29 @@ int nilfs_mdt_freeze_buffer(struct inode *inode, struct buffer_head *bh)
struct buffer_head *bh_frozen;
struct page *page;
int blkbits = inode->i_blkbits;
- int ret = -ENOMEM;
page = grab_cache_page(&shadow->frozen_data, bh->b_page->index);
if (!page)
- return ret;
+ return -ENOMEM;
if (!page_has_buffers(page))
create_empty_buffers(page, 1 << blkbits, 0);
bh_frozen = nilfs_page_get_nth_block(page, bh_offset(bh) >> blkbits);
- if (bh_frozen) {
- if (!buffer_uptodate(bh_frozen))
- nilfs_copy_buffer(bh_frozen, bh);
- if (list_empty(&bh_frozen->b_assoc_buffers)) {
- list_add_tail(&bh_frozen->b_assoc_buffers,
- &shadow->frozen_buffers);
- set_buffer_nilfs_redirected(bh);
- } else {
- brelse(bh_frozen); /* already frozen */
- }
- ret = 0;
+
+ if (!buffer_uptodate(bh_frozen))
+ nilfs_copy_buffer(bh_frozen, bh);
+ if (list_empty(&bh_frozen->b_assoc_buffers)) {
+ list_add_tail(&bh_frozen->b_assoc_buffers,
+ &shadow->frozen_buffers);
+ set_buffer_nilfs_redirected(bh);
+ } else {
+ brelse(bh_frozen); /* already frozen */
}
+
unlock_page(page);
page_cache_release(page);
- return ret;
+ return 0;
}
struct buffer_head *