[PATCH] Documentation: android: binderfs: add 'stats' mount option

[Randy Dunlap]

From: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>

Add documentation of the binderfs 'stats' mount option.

Description taken from the commit message.

Fixes: f00834518ed3 ("binder: add a mount option to show global stats")
Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Cc: Hridya Valsaraju <hridya@xxxxxxxxxx>
Cc: Christian Brauner <christian.brauner@xxxxxxxxxx>
Cc: Christian Brauner <christian@xxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: devel@xxxxxxxxxxxxxxxxxxxx
---
 Documentation/admin-guide/binderfs.rst |    6 ++++++
 1 file changed, 6 insertions(+)

--- linux-next-20200408.orig/Documentation/admin-guide/binderfs.rst
+++ linux-next-20200408/Documentation/admin-guide/binderfs.rst
@@ -33,6 +33,12 @@ max
   a per-instance limit. If ``max=<count>`` is set then only ``<count>`` number
   of binder devices can be allocated in this binderfs instance.
 
+stats
+  Using ``stats=global`` enables global binder statistics.
+  ``stats=global`` is only available for a binderfs instance mounted in the
+  initial user namespace. An attempt to use the option to mount a binderfs
+  instance in another user namespace will return a permission error.
+
 Allocating binder Devices
 -------------------------