From: "J. Bruce Fields" <bfields@xxxxxxxxxx>
Reserve I_MUTEX_PARENT and I_MUTEX_CHILD for locking of actual
directories.
(Also I_MUTEX_QUOTA isn't really a meaningful name for this locking
class any more; fixed in a later patch.)
Acked-by: Jeff Layton <jlayton@xxxxxxxxxx>
Signed-off-by: J. Bruce Fields <bfields@xxxxxxxxxx>
---
fs/inode.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
> Argh, apologies! Revising this patch at one point I forgot to fix up
> one line, and I somehow overlooked the resulting lockdep warning till
> just now.
So the revised patch looks like this.
diff --git a/fs/inode.c b/fs/inode.c
index 20750b0..a8a8ded 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -990,16 +990,16 @@ void lock_two_nondirectories(struct inode *inode1, struct inode *inode2)
{
WARN_ON_ONCE(S_ISDIR(inode1->i_mode));
if (inode1 == inode2 || !inode2) {
- mutex_lock_nested(&inode1->i_mutex, I_MUTEX_PARENT);
+ mutex_lock(&inode1->i_mutex);
return;
}
WARN_ON_ONCE(S_ISDIR(inode2->i_mode));
if (inode1 < inode2) {
- mutex_lock_nested(&inode1->i_mutex, I_MUTEX_PARENT);
- mutex_lock_nested(&inode2->i_mutex, I_MUTEX_CHILD);
+ mutex_lock(&inode1->i_mutex);
+ mutex_lock_nested(&inode2->i_mutex, I_MUTEX_QUOTA);
} else {
- mutex_lock_nested(&inode2->i_mutex, I_MUTEX_PARENT);
- mutex_lock_nested(&inode1->i_mutex, I_MUTEX_CHILD);
+ mutex_lock(&inode2->i_mutex);
+ mutex_lock_nested(&inode1->i_mutex, I_MUTEX_QUOTA);
}
}
EXPORT_SYMBOL(lock_two_nondirectories);
--
1.7.9.5
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