nfs: new subdir Documentation/filesystems/nfs

We're adding enough nfs documentation that it may as well have its own
subdirectory.

Acked-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
diff --git a/fs/cifs/export.c b/fs/cifs/export.c
index 75949d6..6177f7c 100644
--- a/fs/cifs/export.c
+++ b/fs/cifs/export.c
@@ -24,7 +24,7 @@
  */
 
  /*
-  * See Documentation/filesystems/Exporting
+  * See Documentation/filesystems/nfs/Exporting
   * and examples in fs/exportfs
   *
   * Since cifs is a network file system, an "fsid" must be included for
diff --git a/fs/exportfs/expfs.c b/fs/exportfs/expfs.c
index 197c7db..e9e1759 100644
--- a/fs/exportfs/expfs.c
+++ b/fs/exportfs/expfs.c
@@ -6,7 +6,7 @@
  * and for mapping back from file handles to dentries.
  *
  * For details on why we do all the strange and hairy things in here
- * take a look at Documentation/filesystems/Exporting.
+ * take a look at Documentation/filesystems/nfs/Exporting.
  */
 #include <linux/exportfs.h>
 #include <linux/fs.h>
diff --git a/fs/isofs/export.c b/fs/isofs/export.c
index e81a305..ed752cb 100644
--- a/fs/isofs/export.c
+++ b/fs/isofs/export.c
@@ -9,7 +9,7 @@
  *
  * The following files are helpful:
  *
- *     Documentation/filesystems/Exporting
+ *     Documentation/filesystems/nfs/Exporting
  *     fs/exportfs/expfs.c.
  */
 
diff --git a/fs/nfs/Kconfig b/fs/nfs/Kconfig
index 2a77bc2..59e5673 100644
--- a/fs/nfs/Kconfig
+++ b/fs/nfs/Kconfig
@@ -90,7 +90,7 @@
 	  If you want your system to mount its root file system via NFS,
 	  choose Y here.  This is common practice for managing systems
 	  without local permanent storage.  For details, read
-	  <file:Documentation/filesystems/nfsroot.txt>.
+	  <file:Documentation/filesystems/nfs/nfsroot.txt>.
 
 	  Most people say N here.