[PATCH 18/19] fs: Remove old freezing mechanism

[Jan Kara <jack@suse.cz>]

Now that all users are converted, we can remove functions, variables, and
constants defined by the old freezing mechanism.

BugLink: https://bugs.launchpad.net/bugs/897421
Tested-by: Kamal Mostafa <kamal@canonical.com>
Tested-by: Peter M. Petrakis <peter.petrakis@canonical.com>
Tested-by: Dann Frazier <dann.frazier@canonical.com>
Tested-by: Massimo Morana <massimo.morana@canonical.com>
Signed-off-by: Jan Kara <jack@suse.cz>
---
 fs/super.c         |    1 -
 include/linux/fs.h |    9 ---------
 2 files changed, 0 insertions(+), 10 deletions(-)

diff --git a/fs/super.c b/fs/super.c
index 9203907..ff21b59 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -216,7 +216,6 @@ static struct super_block *alloc_super(struct file_system_type *type)
 		mutex_init(&s->s_dquot.dqio_mutex);
 		mutex_init(&s->s_dquot.dqonoff_mutex);
 		init_rwsem(&s->s_dquot.dqptr_sem);
-		init_waitqueue_head(&s->s_wait_unfrozen);
 		s->s_maxbytes = MAX_NON_LFS;
 		s->s_op = &default_op;
 		s->s_time_gran = 1000000000;
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 2c7c7bf..89678b5 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1420,7 +1420,6 @@ extern spinlock_t sb_lock;
 enum {
 	SB_UNFROZEN = 0,		/* FS is unfrozen */
 	SB_FREEZE_WRITE	= 1,		/* Writes, dir ops, ioctls frozen */
-	SB_FREEZE_TRANS = 2,
 	SB_FREEZE_PAGEFAULT = 2,	/* Page faults stopped as well */
 	SB_FREEZE_FS = 3,		/* For internal FS use (e.g. to stop
 					 * internal threads if needed) */
@@ -1489,8 +1488,6 @@ struct super_block {
 	struct hlist_node	s_instances;
 	struct quota_info	s_dquot;	/* Diskquota specific options */
 
-	int			s_frozen;
-	wait_queue_head_t	s_wait_unfrozen;
 	struct sb_writers	s_writers;
 
 	char s_id[32];				/* Informational name */
@@ -1543,12 +1540,6 @@ extern void prune_dcache_sb(struct super_block *sb, int nr_to_scan);
 extern struct timespec current_fs_time(struct super_block *sb);
 
 /*
- * Snapshotting support.
- */
-/* Will go away when all users are converted */
-#define vfs_check_frozen(sb, level) do { } while (0)
-
-/*
  * until VFS tracks user namespaces for inodes, just make all files
  * belong to init_user_ns
  */
-- 
1.7.1