protocol: mention that keymap mapping must be read-only

It may be obvious that the mapping must be established in read-only
mode, but it wasn't specified in the specification text.

Signed-off-by: Simon Ser <contact@emersion.fr>

diff --git a/protocol/wayland.xml b/protocol/wayland.xml
index a87e9dd..8c31cdc 100644 (file)
--- a/protocol/wayland.xml
+++ b/protocol/wayland.xml
@@ -2220,7 +2220,8 @@
     <event name="keymap">
       <description summary="keyboard mapping">
        This event provides a file descriptor to the client which can be
-       memory-mapped to provide a keyboard mapping description.
+       memory-mapped in read-only mode to provide a keyboard mapping
+       description.
 
        From version 7 onwards, the fd must be mapped with MAP_PRIVATE by
        the recipient, as MAP_SHARED may fail.