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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2008-08-11 09:30:21 +0200
committerIngo Molnar <mingo@elte.hu>2008-08-11 09:30:21 +0200
commit64aa348edc617dea17bbd01ddee4e47886d5ec8c (patch)
tree002b5fa796aff225d0cb9d0c32bb3ba96da6eaaf /include
parent5e710e37bde120bb069f691bee68e69ef4393173 (diff)
downloadop-kernel-dev-64aa348edc617dea17bbd01ddee4e47886d5ec8c.zip
op-kernel-dev-64aa348edc617dea17bbd01ddee4e47886d5ec8c.tar.gz
lockdep: lock_set_subclass - reset a held lock's subclass
this can be used to reset a held lock's subclass, for arbitrary-depth iterated data structures such as trees or lists which have per-node locks. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include')
-rw-r--r--include/linux/lockdep.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h
index 1bfdc30..f270ce1 100644
--- a/include/linux/lockdep.h
+++ b/include/linux/lockdep.h
@@ -300,6 +300,9 @@ extern void lock_acquire(struct lockdep_map *lock, unsigned int subclass,
extern void lock_release(struct lockdep_map *lock, int nested,
unsigned long ip);
+extern void lock_set_subclass(struct lockdep_map *lock, unsigned int subclass,
+ unsigned long ip);
+
# define INIT_LOCKDEP .lockdep_recursion = 0,
#define lockdep_depth(tsk) (debug_locks ? (tsk)->lockdep_depth : 0)
@@ -316,6 +319,7 @@ static inline void lockdep_on(void)
# define lock_acquire(l, s, t, r, c, i) do { } while (0)
# define lock_release(l, n, i) do { } while (0)
+# define lock_set_subclass(l, s, i) do { } while (0)
# define lockdep_init() do { } while (0)
# define lockdep_info() do { } while (0)
# define lockdep_init_map(lock, name, key, sub) do { (void)(key); } while (0)
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