Use ecryptfs_dentry_to_lower_path in a couple of places

There are two places in ecryptfs that benefit from using
ecryptfs_dentry_to_lower_path() instead of separate calls to
ecryptfs_dentry_to_lower() and ecryptfs_dentry_to_lower_mnt().  Both
sites use fewer instructions and less stack (determined by examining
objdump output).

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>

1 files changed, 3 insertions, 4 deletions

diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c
index e924cf45aad9..eb1c5979ecaf 100644
--- a/fs/ecryptfs/main.c
+++ b/fs/ecryptfs/main.c
@@ -120,16 +120,15 @@ static int ecryptfs_init_lower_file(struct dentry *dentry,
                                     struct file **lower_file)
 {
         const struct cred *cred = current_cred();
-        struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry);
-        struct vfsmount *lower_mnt = ecryptfs_dentry_to_lower_mnt(dentry);
+        struct path *path = ecryptfs_dentry_to_lower_path(dentry);
         int rc;
 
-        rc = ecryptfs_privileged_open(lower_file, lower_dentry, lower_mnt,
+        rc = ecryptfs_privileged_open(lower_file, path->dentry, path->mnt,
                                       cred);
         if (rc) {
                 printk(KERN_ERR "Error opening lower file "
                        "for lower_dentry [0x%p] and lower_mnt [0x%p]; "
-                       "rc = [%d]\n", lower_dentry, lower_mnt, rc);
+                       "rc = [%d]\n", path->dentry, path->mnt, rc);
                 (*lower_file) = NULL;
         }
         return rc;