ocfs2: Silence false lockdep warnings
Create separate lockdep lock classes for system file's i_mutexes. They are
used to guard allocations and similar things and thus rank differently
than i_mutex of a regular file or directory.
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
diff --git a/fs/ocfs2/inode.c b/fs/ocfs2/inode.c
index 00cd5b7..5e19c11 100644
--- a/fs/ocfs2/inode.c
+++ b/fs/ocfs2/inode.c
@@ -57,8 +57,11 @@
u64 fi_blkno;
unsigned long fi_ino;
unsigned int fi_flags;
+ unsigned int fi_sysfile_type;
};
+static struct lock_class_key ocfs2_sysfile_lock_key[NUM_SYSTEM_INODES];
+
static int ocfs2_read_locked_inode(struct inode *inode,
struct ocfs2_find_inode_args *args);
static int ocfs2_init_locked_inode(struct inode *inode, void *opaque);
@@ -106,7 +109,8 @@
oi->ip_attr |= OCFS2_DIRSYNC_FL;
}
-struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 blkno, int flags)
+struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 blkno, unsigned flags,
+ int sysfile_type)
{
struct inode *inode = NULL;
struct super_block *sb = osb->sb;
@@ -126,6 +130,7 @@
args.fi_blkno = blkno;
args.fi_flags = flags;
args.fi_ino = ino_from_blkno(sb, blkno);
+ args.fi_sysfile_type = sysfile_type;
inode = iget5_locked(sb, args.fi_ino, ocfs2_find_actor,
ocfs2_init_locked_inode, &args);
@@ -200,6 +205,9 @@
inode->i_ino = args->fi_ino;
OCFS2_I(inode)->ip_blkno = args->fi_blkno;
+ if (args->fi_sysfile_type != 0)
+ lockdep_set_class(&inode->i_mutex,
+ &ocfs2_sysfile_lock_key[args->fi_sysfile_type]);
mlog_exit(0);
return 0;
