fs: change d_delete semantics

Change d_delete from a dentry deletion notification to a dentry caching
advise, more like ->drop_inode. Require it to be constant and idempotent,
and not take d_lock. This is how all existing filesystems use the callback
anyway.

This makes fine grained dentry locking of dput and dentry lru scanning
much simpler.

Signed-off-by: Nick Piggin <npiggin@kernel.dk>

1 files changed, 0 insertions, 2 deletions

diff --git a/fs/dcache.c b/fs/dcache.c
index b2cb2662ca00..6ee6bc40cb63 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -453,8 +453,6 @@ static void prune_one_dentry(struct dentry * dentry)
                 if (!atomic_dec_and_lock(&dentry->d_count, &dentry->d_lock))
                         return;
 
-                if (dentry->d_op && dentry->d_op->d_delete)
-                        dentry->d_op->d_delete(dentry);
                 dentry_lru_del(dentry);
                 __d_drop(dentry);
                 dentry = d_kill(dentry);