lockdep: per filesystem inode lock class

Give each filesystem its own inode lock class. The various filesystems have
different locking order wrt the inode locks; esp. the pseudo filesystems differ
from the rest.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>

1 files changed, 5 insertions, 0 deletions

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 16421f662a7a..0cad20e12585 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1302,8 +1302,13 @@ struct file_system_type {
         struct module *owner;
         struct file_system_type * next;
         struct list_head fs_supers;
+
         struct lock_class_key s_lock_key;
         struct lock_class_key s_umount_key;
+
+        struct lock_class_key i_lock_key;
+        struct lock_class_key i_mutex_key;
+        struct lock_class_key i_alloc_sem_key;
 };
 
 extern int get_sb_bdev(struct file_system_type *fs_type,