diff options
| author | Matti Linnanvuori <mattilinnanvuori@yahoo.com> | 2007-10-17 10:29:41 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-17 19:42:57 +0400 |
| commit | f20fda486164264e0c9a64f3256b3238d0dc78d7 (patch) | |
| tree | 4daca9e4a4bee1a3776c965b8b47c64f14420b3b | |
| parent | 1019f96d2d3aa4997d8055bd0c32c97f0fc21d06 (diff) | |
| download | linux-f20fda486164264e0c9a64f3256b3238d0dc78d7.tar.xz | |
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.txt | 3 | ||||
| -rw-r--r-- | include/linux/mutex.h | 3 |
2 files changed, 4 insertions, 2 deletions
diff --git a/Documentation/mutex-design.txt b/Documentation/mutex-design.txt index cbf79881a41c..51f935191ae5 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 6a735c72f23f..601479772b98 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 |