* [PATCH] NOMMU: Document NOMMU support for futexes
@ 2006-09-07 16:41 David Howells
0 siblings, 0 replies; only message in thread
From: David Howells @ 2006-09-07 16:41 UTC (permalink / raw)
To: torvalds, akpm, mingo, benh; +Cc: linux-kernel, uclinux-dev, dhowells
From: David Howells <dhowells@redhat.com>
Document the fact that NOMMU now supports futexes.
Signed-Off-By: David Howells <dhowells@redhat.com>
---
Documentation/nommu-mmap.txt | 10 ++++++++++
1 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/Documentation/nommu-mmap.txt b/Documentation/nommu-mmap.txt
index 4db7c18..7714f57 100644
--- a/Documentation/nommu-mmap.txt
+++ b/Documentation/nommu-mmap.txt
@@ -138,6 +138,16 @@ mode. The former through the usual mech
on ramfs or tmpfs mounts.
+=======
+FUTEXES
+=======
+
+Futexes are supported in NOMMU mode if the arch supports them. An error will
+be given if an address passed to the futex system call lies outside the
+mappings made by a process or if the mapping in which the address lies does not
+support futexes (such as an I/O chardev mapping).
+
+
=============
NO-MMU MREMAP
=============
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