Commit 897c6ff9 authored by Arjan van de Ven's avatar Arjan van de Ven Committed by Linus Torvalds
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[PATCH] lockdep: annotate sb ->s_umount

The s_umount rwsem needs to be classified as per-superblock since it's
perfectly legit to keep multiple of those recursively in the VFS locking

Has no effect on non-lockdep kernels.

Signed-off-by: default avatarArjan van de Ven <>
Signed-off-by: default avatarIngo Molnar <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent cf516249
......@@ -72,6 +72,7 @@ static struct super_block *alloc_super(struct file_system_type *type)
lockdep_set_class(&s->s_umount, &type->s_umount_key);
* The locking rules for s_lock are up to the
* filesystem. For example ext3fs has different
......@@ -1296,6 +1296,7 @@ struct file_system_type {
struct file_system_type * next;
struct list_head fs_supers;
struct lock_class_key s_lock_key;
struct lock_class_key s_umount_key;
extern int get_sb_bdev(struct file_system_type *fs_type,
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