Revert "f2fs: add un/freeze_fs into super_operations"

Revert due to compile.
Pulled from:
MotorolaMobilityLLC/kernel-msm@ccaaa6e

Author: ccfries

fs/f2fs/gc.c

@@ -44,10 +44,10 @@ static int gc_thread_func(void *data)
 		if (kthread_should_stop())
 			break;
 
-		if (sbi->sb->s_writers.frozen >= SB_FREEZE_WRITE) {
-			wait_ms = GC_THREAD_MAX_SLEEP_TIME;
+		f2fs_balance_fs(sbi);
+
+		if (!test_opt(sbi, BG_GC))
 			continue;
-		}
 
 		/*
 		 * [GC triggering condition]

fs/f2fs/inode.c

@@ -245,15 +245,13 @@ void f2fs_evict_inode(struct inode *inode)
 	if (inode->i_nlink || is_bad_inode(inode))
 		goto no_delete;
 
-	sb_start_intwrite(inode->i_sb);
 	set_inode_flag(F2FS_I(inode), FI_NO_ALLOC);
 	i_size_write(inode, 0);
 
 	if (F2FS_HAS_BLOCKS(inode))
 		f2fs_truncate(inode);
 
 	remove_inode_page(inode);
-	sb_end_intwrite(inode->i_sb);
 no_delete:
 	end_writeback(inode);
 }

fs/f2fs/super.c

@@ -143,22 +143,6 @@ int f2fs_sync_fs(struct super_block *sb, int sync)
 	return 0;
 }
 
-static int f2fs_freeze(struct super_block *sb)
-{
-	int err;
-
-	if (sb->s_flags & MS_RDONLY)
-		return 0;
-
-	err = f2fs_sync_fs(sb, 1);
-	return err;
-}
-
-static int f2fs_unfreeze(struct super_block *sb)
-{
-	return 0;
-}
-
 static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
 	struct super_block *sb = dentry->d_sb;
@@ -229,8 +213,6 @@ static struct super_operations f2fs_sops = {
 	.evict_inode	= f2fs_evict_inode,
 	.put_super	= f2fs_put_super,
 	.sync_fs	= f2fs_sync_fs,
-	.freeze_fs	= f2fs_freeze,
-	.unfreeze_fs	= f2fs_unfreeze,
 	.statfs		= f2fs_statfs,
 };