| commit | 040a0a37100563754bb1fee6ff6427420bcfa609 | [log] [tgz] |
|---|---|---|
| author | Maarten Lankhorst <[email protected]> | Mon Jun 24 10:30:04 2013 +0200 |
| committer | Ingo Molnar <[email protected]> | Wed Jun 26 12:10:56 2013 +0200 |
| tree | 153e76b27ef95f57ad2055d42b8bb07cb1f8d493 | |
| parent | a41b56efa70e060f650aeb54740aaf52044a1ead [diff] [blame] |
mutex: Add support for wound/wait style locks Wound/wait mutexes are used when other multiple lock acquisitions of a similar type can be done in an arbitrary order. The deadlock handling used here is called wait/wound in the RDBMS literature: The older tasks waits until it can acquire the contended lock. The younger tasks needs to back off and drop all the locks it is currently holding, i.e. the younger task is wounded. For full documentation please read Documentation/ww-mutex-design.txt. References: https://lwn.net/Articles/548909/ Signed-off-by: Maarten Lankhorst <[email protected]> Acked-by: Daniel Vetter <[email protected]> Acked-by: Rob Clark <[email protected]> Acked-by: Peter Zijlstra <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: Linus Torvalds <[email protected]> Cc: Andrew Morton <[email protected]> Cc: Thomas Gleixner <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]>
diff --git a/include/linux/mutex-debug.h b/include/linux/mutex-debug.h index 731d77d..4ac8b19 100644 --- a/include/linux/mutex-debug.h +++ b/include/linux/mutex-debug.h
@@ -3,6 +3,7 @@ #include <linux/linkage.h> #include <linux/lockdep.h> +#include <linux/debug_locks.h> /* * Mutexes - debugging helpers: