Add RCU check for find_task_by_vpid().

[net-next-2.6.git] / include / linux / rcupdate.h

diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index b973dea2d6b01a6ff8f23d408e8a9dd87b5ecaec..b124bc6a75ad352101268e2d17f07cc9c2636dd7 100644 (file)
--- a/include/linux/rcupdate.h
+++ b/include/linux/rcupdate.h
@@ -215,7 +215,11 @@ static inline int rcu_read_lock_sched_held(void)
 
 extern int rcu_my_thread_group_empty(void);
 
-#define __do_rcu_dereference_check(c)                                  \
+/**
+ * rcu_lockdep_assert - emit lockdep splat if specified condition not met
+ * @c: condition to check
+ */
+#define rcu_lockdep_assert(c)                                          \
        do {                                                            \
                static bool __warned;                                   \
                if (debug_lockdep_rcu_enabled() && !__warned && !(c)) { \
@@ -226,7 +230,7 @@ extern int rcu_my_thread_group_empty(void);
 
 #else /* #ifdef CONFIG_PROVE_RCU */
 
-#define __do_rcu_dereference_check(c) do { } while (0)
+#define rcu_lockdep_assert(c) do { } while (0)
 
 #endif /* #else #ifdef CONFIG_PROVE_RCU */
 
@@ -247,14 +251,14 @@ extern int rcu_my_thread_group_empty(void);
 #define __rcu_dereference_check(p, c, space) \
        ({ \
                typeof(*p) *_________p1 = (typeof(*p)*__force )ACCESS_ONCE(p); \
-               __do_rcu_dereference_check(c); \
+               rcu_lockdep_assert(c); \
                (void) (((typeof (*p) space *)p) == p); \
                smp_read_barrier_depends(); \
                ((typeof(*p) __force __kernel *)(_________p1)); \
        })
 #define __rcu_dereference_protected(p, c, space) \
        ({ \
-               __do_rcu_dereference_check(c); \
+               rcu_lockdep_assert(c); \
                (void) (((typeof (*p) space *)p) == p); \
                ((typeof(*p) __force __kernel *)(p)); \
        })
@@ -262,7 +266,7 @@ extern int rcu_my_thread_group_empty(void);
 #define __rcu_dereference_index_check(p, c) \
        ({ \
                typeof(p) _________p1 = ACCESS_ONCE(p); \
-               __do_rcu_dereference_check(c); \
+               rcu_lockdep_assert(c); \
                smp_read_barrier_depends(); \
                (_________p1); \
        })