[PATCH 10/11] vfs: Remove d_drop calls from d_revalidate implementations

[Eric W. Biederman]

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.

Signed-off-by: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>
---
 fs/ceph/dir.c  |    1 -
 fs/proc/base.c |    4 ----
 fs/proc/fd.c   |    2 --
 3 files changed, 0 insertions(+), 7 deletions(-)

diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index 6da4df84ba30..ecd2402739e2 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -1052,7 +1052,6 @@ 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 51507065263b..aa62b37f1303 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -1654,7 +1654,6 @@ int pid_revalidate(struct dentry *dentry, unsigned int flags)
 		put_task_struct(task);
 		return 1;
 	}
-	d_drop(dentry);
 	return 0;
 }
 
@@ -1791,9 +1790,6 @@ 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 985ea881b5bc..7e4f04ccab31 100644
--- a/fs/proc/fd.c
+++ b/fs/proc/fd.c
@@ -127,8 +127,6 @@ static int tid_fd_revalidate(struct dentry *dentry, unsigned int flags)
 		}
 		put_task_struct(task);
 	}
-
-	d_drop(dentry);
 	return 0;
 }
 
-- 
1.7.5.4

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