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-rw-r--r--Documentation/nommu-mmap.txt9
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/nommu-mmap.txt b/Documentation/nommu-mmap.txt
index 3ce89066493..4db7c18bf68 100644
--- a/Documentation/nommu-mmap.txt
+++ b/Documentation/nommu-mmap.txt
@@ -129,6 +129,15 @@ FURTHER NOTES ON NO-MMU MMAP
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
=============