[PATCH] NOMMU: Add docs about shared memory
Add documentation about using shared memory in NOMMU mode.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/Documentation/nommu-mmap.txt b/Documentation/nommu-mmap.txt
index 3ce8906..4db7c18 100644
--- a/Documentation/nommu-mmap.txt
+++ b/Documentation/nommu-mmap.txt
@@ -129,6 +129,15 @@
with character device files, pipes, fifos and sockets.
+==========================
+INTERPROCESS SHARED MEMORY
+==========================
+
+Both SYSV IPC SHM shared memory and POSIX shared memory is supported in NOMMU
+mode. The former through the usual mechanism, the latter through files created
+on ramfs or tmpfs mounts.
+
+
=============
NO-MMU MREMAP
=============