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authorRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2010-09-05 11:17:35 +0400
committerRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2010-10-23 04:24:38 +0400
commit090fd5b10165033d7c30afde0a7e59141d820602 (patch)
treecbb3ec5b29719457cd45f72624d03d7e31af4a4c /fs/nilfs2/the_nilfs.h
parentc6e071884aca360a14c21757d760e76ec34b4894 (diff)
downloadlinux-090fd5b10165033d7c30afde0a7e59141d820602.tar.xz
nilfs2: get rid of back pointer to writable sb instance
Nilfs object holds a back pointer to a writable super block instance in nilfs->ns_writer, and this became eliminable since sb is now made per device and all inodes have a valid pointer to it. This deletes the ns_writer pointer and a reader/writer semaphore protecting it. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Diffstat (limited to 'fs/nilfs2/the_nilfs.h')
-rw-r--r--fs/nilfs2/the_nilfs.h21
1 files changed, 0 insertions, 21 deletions
diff --git a/fs/nilfs2/the_nilfs.h b/fs/nilfs2/the_nilfs.h
index cae56f338b64..bbbc1c748aac 100644
--- a/fs/nilfs2/the_nilfs.h
+++ b/fs/nilfs2/the_nilfs.h
@@ -48,9 +48,7 @@ enum {
* @ns_flags: flags
* @ns_bdev: block device
* @ns_bdi: backing dev info
- * @ns_writer: back pointer to writable nilfs_sb_info
* @ns_sem: semaphore for shared states
- * @ns_writer_sem: semaphore protecting ns_writer attach/detach
* @ns_sbh: buffer heads of on-disk super blocks
* @ns_sbp: pointers to super block data
* @ns_sbwtime: previous write time of super block
@@ -93,9 +91,7 @@ struct the_nilfs {
struct block_device *ns_bdev;
struct backing_dev_info *ns_bdi;
- struct nilfs_sb_info *ns_writer;
struct rw_semaphore ns_sem;
- struct rw_semaphore ns_writer_sem;
/*
* used for
@@ -252,23 +248,6 @@ static inline void nilfs_get_root(struct nilfs_root *root)
atomic_inc(&root->count);
}
-static inline void
-nilfs_attach_writer(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi)
-{
- down_write(&nilfs->ns_writer_sem);
- nilfs->ns_writer = sbi;
- up_write(&nilfs->ns_writer_sem);
-}
-
-static inline void
-nilfs_detach_writer(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi)
-{
- down_write(&nilfs->ns_writer_sem);
- if (sbi == nilfs->ns_writer)
- nilfs->ns_writer = NULL;
- up_write(&nilfs->ns_writer_sem);
-}
-
static inline int nilfs_valid_fs(struct the_nilfs *nilfs)
{
unsigned valid_fs;