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authorMatti Linnanvuori <mattilinnanvuori@yahoo.com>2007-10-16 23:29:41 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-17 08:42:57 -0700
commitf20fda486164264e0c9a64f3256b3238d0dc78d7 (patch)
tree4daca9e4a4bee1a3776c965b8b47c64f14420b3b
parent1019f96d2d3aa4997d8055bd0c32c97f0fc21d06 (diff)
Mutex documentation is unclear about software interrupts, tasklets and timers
Acked-by: Arjan van de Ven <arjan@linux.intel.com> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--Documentation/mutex-design.txt3
-rw-r--r--include/linux/mutex.h3
2 files changed, 4 insertions, 2 deletions
diff --git a/Documentation/mutex-design.txt b/Documentation/mutex-design.txt
index cbf79881a41..51f935191ae 100644
--- a/Documentation/mutex-design.txt
+++ b/Documentation/mutex-design.txt
@@ -90,7 +90,8 @@ of advantages of mutexes:
* - task may not exit with mutex held
* - memory areas where held locks reside must not be freed
* - held mutexes must not be reinitialized
- * - mutexes may not be used in irq contexts
+ * - mutexes may not be used in hardware or software interrupt
+ * contexts such as tasklets and timers
furthermore, there are also convenience features in the debugging
code:
diff --git a/include/linux/mutex.h b/include/linux/mutex.h
index 6a735c72f23..601479772b9 100644
--- a/include/linux/mutex.h
+++ b/include/linux/mutex.h
@@ -29,7 +29,8 @@
* - task may not exit with mutex held
* - memory areas where held locks reside must not be freed
* - held mutexes must not be reinitialized
- * - mutexes may not be used in irq contexts
+ * - mutexes may not be used in hardware or software interrupt
+ * contexts such as tasklets and timers
*
* These semantics are fully enforced when DEBUG_MUTEXES is
* enabled. Furthermore, besides enforcing the above rules, the mutex