exofs: remove BKL from super operations

the two places inside exofs that where taking the BKL were:
exofs_put_super() - .put_super
and
exofs_sync_fs() - which is .sync_fs and is also called from
                  .write_super.

Now exofs_sync_fs() is protected from itself by also taking
the sb_lock.

exofs_put_super() directly calls exofs_sync_fs() so there is no
danger between these two either.

In anyway there is absolutely nothing dangerous been done
inside exofs_sync_fs().

Unless there is some subtle race with the actual lifetime of
the super_block in regard to .put_super and some other parts
of the VFS. Which is highly unlikely.

Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 0 insertions, 6 deletions

diff --git a/fs/exofs/super.c b/fs/exofs/super.c
index 5ab10c3bbebe..9f500dec3b59 100644
--- a/fs/exofs/super.c
+++ b/fs/exofs/super.c
@@ -214,7 +214,6 @@ int exofs_sync_fs(struct super_block *sb, int wait)
         }
 
         lock_super(sb);
-        lock_kernel();
         sbi = sb->s_fs_info;
         fscb->s_nextid = cpu_to_le64(sbi->s_nextid);
         fscb->s_numfiles = cpu_to_le32(sbi->s_numfiles);
@@ -245,7 +244,6 @@ int exofs_sync_fs(struct super_block *sb, int wait)
 out:
         if (or)
                 osd_end_request(or);
-        unlock_kernel();
         unlock_super(sb);
         kfree(fscb);
         return ret;
@@ -268,8 +266,6 @@ static void exofs_put_super(struct super_block *sb)
         int num_pend;
         struct exofs_sb_info *sbi = sb->s_fs_info;
 
-        lock_kernel();
-
         if (sb->s_dirt)
                 exofs_write_super(sb);
 
@@ -286,8 +282,6 @@ static void exofs_put_super(struct super_block *sb)
         osduld_put_device(sbi->s_dev);
         kfree(sb->s_fs_info);
         sb->s_fs_info = NULL;
-
-        unlock_kernel();
 }
 
 /*