fix file_system_type leak on gfs2meta mount
 

From: Christoph Hellwig <hch@lst.de>

get_gfs2_sb does a get_fs_type without doing a put_filesystem and
thus leaking a file_system_type reference everytime it's called.

Just use gfs2_fs_type directly instead of doing the lookup and thus
fix the problem.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index c4b7a21..63d5fd2 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -943,7 +943,6 @@ static struct super_block* get_gfs2_sb(const char *dev_name)
{
struct kstat stat;
struct nameidata nd;
- struct file_system_type *fstype;
struct super_block *sb = NULL, *s;
int error;

@@ -955,8 +954,7 @@ static struct super_block* get_gfs2_sb(const char *dev_name)
}
error = vfs_getattr(nd.path.mnt, nd.path.dentry, &stat);

- fstype = get_fs_type("gfs2");
- list_for_each_entry(s, &fstype->fs_supers, s_instances) {
+ list_for_each_entry(s, &gfs2_fs_type.fs_supers, s_instances) {
if ((S_ISBLK(stat.mode) && s->s_dev == stat.rdev) ||
(S_ISDIR(stat.mode) &&
s == nd.path.dentry->d_inode->i_sb)) {
--
1.5.1.2