vfs: move get_fs_root_and_pwd() to single caller

Let's not pollute the include files with inline functions that are only
used in a single place.  Especially not if we decide we might want to
change the semantics of said function to make it more efficient..

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/dcache.c b/fs/dcache.c
index f3dcc63..4df68e2 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -3015,6 +3015,17 @@
 	return ERR_PTR(-ENAMETOOLONG);
 }
 
+static inline void get_fs_root_and_pwd(struct fs_struct *fs, struct path *root,
+				       struct path *pwd)
+{
+	spin_lock(&fs->lock);
+	*root = fs->root;
+	path_get(root);
+	*pwd = fs->pwd;
+	path_get(pwd);
+	spin_unlock(&fs->lock);
+}
+
 /*
  * NOTE! The user-level library version returns a
  * character pointer. The kernel system call just