vfs: Remove d_drop calls from d_revalidate implementations

Now that d_invalidate always succeeds it is not longer necessary or
desirable to hard code d_drop calls into filesystem specific
d_revalidate implementations.

Remove the unnecessary d_drop calls and rely on d_invalidate
to drop the dentries.  Using d_invalidate ensures that paths
to mount points will not be dropped.

Reviewed-by: Miklos Szeredi <miklos@szeredi.hu>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

3 files changed, 0 insertions, 7 deletions

diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index c29d6ae68874..b6c59eaa4f64 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -1069,7 +1069,6 @@ static int ceph_d_revalidate(struct dentry *dentry, unsigned int flags)
                 ceph_dentry_lru_touch(dentry);
         } else {
                 ceph_dir_clear_complete(dir);
-                d_drop(dentry);
         }
         iput(dir);
         return valid;
diff --git a/fs/proc/base.c b/fs/proc/base.c
index baf852b648ad..b4fe0ee08942 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -1590,7 +1590,6 @@ int pid_revalidate(struct dentry *dentry, unsigned int flags)
                 put_task_struct(task);
                 return 1;
         }
-        d_drop(dentry);
         return 0;
 }
 
@@ -1727,9 +1726,6 @@ out:
         put_task_struct(task);
 
 out_notask:
-        if (status <= 0)
-                d_drop(dentry);
-
         return status;
 }
 
diff --git a/fs/proc/fd.c b/fs/proc/fd.c
index 955bb55fab8c..e11d7c590bb0 100644
--- a/fs/proc/fd.c
+++ b/fs/proc/fd.c
@@ -129,8 +129,6 @@ static int tid_fd_revalidate(struct dentry *dentry, unsigned int flags)
                 }
                 put_task_struct(task);
         }
-
-        d_drop(dentry);
         return 0;
 }