lockdep: Introduce lock_acquire_exclusive()/shared() helper macros
In lockdep.h, the spinlock/mutex/rwsem/rwlock/lock_map acquire macros have
different definitions based on the value of CONFIG_PROVE_LOCKING. We have
separate ifdefs for each of these definitions, which seems redundant.
Introduce lock_acquire_{exclusive,shared,shared_recursive} helpers which
will have different definitions based on CONFIG_PROVE_LOCKING. Then all
other helper macros can be defined based on the above ones, which reduces
the amount of ifdefined code.
Signed-off-by: Michel Lespinasse <walken@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: "Srivatsa S. Bhat" <srivatsa.bhat@linux.vnet.ibm.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: "Paul E. McKenney" <paulmck@us.ibm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/20130708212350.6DD1931C15E@corp2gmr1-1.hot.corp.google.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h
index f1e877b..cfc2f11 100644
--- a/include/linux/lockdep.h
+++ b/include/linux/lockdep.h
@@ -365,7 +365,7 @@
#define lockdep_recursing(tsk) ((tsk)->lockdep_recursion)
-#else /* !LOCKDEP */
+#else /* !CONFIG_LOCKDEP */
static inline void lockdep_off(void)
{
@@ -479,82 +479,36 @@
* on the per lock-class debug mode:
*/
-#ifdef CONFIG_DEBUG_LOCK_ALLOC
-# ifdef CONFIG_PROVE_LOCKING
-# define spin_acquire(l, s, t, i) lock_acquire(l, s, t, 0, 2, NULL, i)
-# define spin_acquire_nest(l, s, t, n, i) lock_acquire(l, s, t, 0, 2, n, i)
-# else
-# define spin_acquire(l, s, t, i) lock_acquire(l, s, t, 0, 1, NULL, i)
-# define spin_acquire_nest(l, s, t, n, i) lock_acquire(l, s, t, 0, 1, NULL, i)
-# endif
-# define spin_release(l, n, i) lock_release(l, n, i)
+#ifdef CONFIG_PROVE_LOCKING
+ #define lock_acquire_exclusive(l, s, t, n, i) lock_acquire(l, s, t, 0, 2, n, i)
+ #define lock_acquire_shared(l, s, t, n, i) lock_acquire(l, s, t, 1, 2, n, i)
+ #define lock_acquire_shared_recursive(l, s, t, n, i) lock_acquire(l, s, t, 2, 2, n, i)
#else
-# define spin_acquire(l, s, t, i) do { } while (0)
-# define spin_release(l, n, i) do { } while (0)
+ #define lock_acquire_exclusive(l, s, t, n, i) lock_acquire(l, s, t, 0, 1, n, i)
+ #define lock_acquire_shared(l, s, t, n, i) lock_acquire(l, s, t, 1, 1, n, i)
+ #define lock_acquire_shared_recursive(l, s, t, n, i) lock_acquire(l, s, t, 2, 1, n, i)
#endif
-#ifdef CONFIG_DEBUG_LOCK_ALLOC
-# ifdef CONFIG_PROVE_LOCKING
-# define rwlock_acquire(l, s, t, i) lock_acquire(l, s, t, 0, 2, NULL, i)
-# define rwlock_acquire_read(l, s, t, i) lock_acquire(l, s, t, 2, 2, NULL, i)
-# else
-# define rwlock_acquire(l, s, t, i) lock_acquire(l, s, t, 0, 1, NULL, i)
-# define rwlock_acquire_read(l, s, t, i) lock_acquire(l, s, t, 2, 1, NULL, i)
-# endif
-# define rwlock_release(l, n, i) lock_release(l, n, i)
-#else
-# define rwlock_acquire(l, s, t, i) do { } while (0)
-# define rwlock_acquire_read(l, s, t, i) do { } while (0)
-# define rwlock_release(l, n, i) do { } while (0)
-#endif
+#define spin_acquire(l, s, t, i) lock_acquire_exclusive(l, s, t, NULL, i)
+#define spin_acquire_nest(l, s, t, n, i) lock_acquire_exclusive(l, s, t, n, i)
+#define spin_release(l, n, i) lock_release(l, n, i)
-#ifdef CONFIG_DEBUG_LOCK_ALLOC
-# ifdef CONFIG_PROVE_LOCKING
-# define mutex_acquire(l, s, t, i) lock_acquire(l, s, t, 0, 2, NULL, i)
-# define mutex_acquire_nest(l, s, t, n, i) lock_acquire(l, s, t, 0, 2, n, i)
-# else
-# define mutex_acquire(l, s, t, i) lock_acquire(l, s, t, 0, 1, NULL, i)
-# define mutex_acquire_nest(l, s, t, n, i) lock_acquire(l, s, t, 0, 1, n, i)
-# endif
-# define mutex_release(l, n, i) lock_release(l, n, i)
-#else
-# define mutex_acquire(l, s, t, i) do { } while (0)
-# define mutex_acquire_nest(l, s, t, n, i) do { } while (0)
-# define mutex_release(l, n, i) do { } while (0)
-#endif
+#define rwlock_acquire(l, s, t, i) lock_acquire_exclusive(l, s, t, NULL, i)
+#define rwlock_acquire_read(l, s, t, i) lock_acquire_shared_recursive(l, s, t, NULL, i)
+#define rwlock_release(l, n, i) lock_release(l, n, i)
-#ifdef CONFIG_DEBUG_LOCK_ALLOC
-# ifdef CONFIG_PROVE_LOCKING
-# define rwsem_acquire(l, s, t, i) lock_acquire(l, s, t, 0, 2, NULL, i)
-# define rwsem_acquire_nest(l, s, t, n, i) lock_acquire(l, s, t, 0, 2, n, i)
-# define rwsem_acquire_read(l, s, t, i) lock_acquire(l, s, t, 1, 2, NULL, i)
-# else
-# define rwsem_acquire(l, s, t, i) lock_acquire(l, s, t, 0, 1, NULL, i)
-# define rwsem_acquire_nest(l, s, t, n, i) lock_acquire(l, s, t, 0, 1, n, i)
-# define rwsem_acquire_read(l, s, t, i) lock_acquire(l, s, t, 1, 1, NULL, i)
-# endif
+#define mutex_acquire(l, s, t, i) lock_acquire_exclusive(l, s, t, NULL, i)
+#define mutex_acquire_nest(l, s, t, n, i) lock_acquire_exclusive(l, s, t, n, i)
+#define mutex_release(l, n, i) lock_release(l, n, i)
+
+#define rwsem_acquire(l, s, t, i) lock_acquire_exclusive(l, s, t, NULL, i)
+#define rwsem_acquire_nest(l, s, t, n, i) lock_acquire_exclusive(l, s, t, n, i)
+#define rwsem_acquire_read(l, s, t, i) lock_acquire_shared(l, s, t, NULL, i)
# define rwsem_release(l, n, i) lock_release(l, n, i)
-#else
-# define rwsem_acquire(l, s, t, i) do { } while (0)
-# define rwsem_acquire_nest(l, s, t, n, i) do { } while (0)
-# define rwsem_acquire_read(l, s, t, i) do { } while (0)
-# define rwsem_release(l, n, i) do { } while (0)
-#endif
-#ifdef CONFIG_DEBUG_LOCK_ALLOC
-# ifdef CONFIG_PROVE_LOCKING
-# define lock_map_acquire(l) lock_acquire(l, 0, 0, 0, 2, NULL, _THIS_IP_)
-# define lock_map_acquire_read(l) lock_acquire(l, 0, 0, 2, 2, NULL, _THIS_IP_)
-# else
-# define lock_map_acquire(l) lock_acquire(l, 0, 0, 0, 1, NULL, _THIS_IP_)
-# define lock_map_acquire_read(l) lock_acquire(l, 0, 0, 2, 1, NULL, _THIS_IP_)
-# endif
+#define lock_map_acquire(l) lock_acquire_exclusive(l, 0, 0, NULL, _THIS_IP_)
+#define lock_map_acquire_read(l) lock_acquire_shared_recursive(l, 0, 0, NULL, _THIS_IP_)
# define lock_map_release(l) lock_release(l, 1, _THIS_IP_)
-#else
-# define lock_map_acquire(l) do { } while (0)
-# define lock_map_acquire_read(l) do { } while (0)
-# define lock_map_release(l) do { } while (0)
-#endif
#ifdef CONFIG_PROVE_LOCKING
# define might_lock(lock) \