doc/filesystems: more mount cleanups

Documentation/filesystems/sharedsubtree.txt needs updating because the
mount command in util-linux package is well aware of shared subtree
features now.  The patch also fixes two typos in sharedsubtree.txt.

Signed-off-by: Peng Tao <bergwolf@gmail.com>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Miklos Szeredi <miklos@szeredi.hu>
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 11 insertions, 6 deletions

diff --git a/Documentation/filesystems/sharedsubtree.txt b/Documentation/filesystems/sharedsubtree.txt
index b2c1ee5d98fc..23a181074f94 100644
--- a/Documentation/filesystems/sharedsubtree.txt
+++ b/Documentation/filesystems/sharedsubtree.txt
@@ -4,7 +4,7 @@ Shared Subtrees
 Contents:
         1) Overview
         2) Features
-        3) smount command
+        3) Setting mount states
         4) Use-case
         5) Detailed semantics
         6) Quiz
@@ -135,10 +135,15 @@ replicas continue to be exactly same.
         Binding a unbindable mount is a invalid operation.
 
 
-3) smount command
+3) Setting mount states
 
-        Modern mount(8) command is aware of shared subtree features,
-        so use it instead of the 'smount' command. [source code removed]
+        The mount command (util-linux package) can be used to set mount
+        states:
+
+        mount --make-shared mountpoint
+        mount --make-slave mountpoint
+        mount --make-private mountpoint
+        mount --make-unbindable mountpoint
 
 
 4) Use cases
@@ -209,7 +214,7 @@ replicas continue to be exactly same.
                 mount --rbind / /view/v3
                 mount --rbind / /view/v4
 
-                and if /usr has a versioning filesystem mounted, than that
+                and if /usr has a versioning filesystem mounted, then that
                 mount appears at /view/v1/usr, /view/v2/usr, /view/v3/usr and
                 /view/v4/usr too
 
@@ -249,7 +254,7 @@ replicas continue to be exactly same.
 
                 For example:
                         mount --make-shared /mnt
-                        mount --bin /mnt /tmp
+                        mount --bind /mnt /tmp
 
                 The mount at /mnt and that at /tmp are both shared and belong
                 to the same peer group. Anything mounted or unmounted under