atomic: Suppress sparse warning.

With the latest version of sparse, the ATOMIC_VAR_INIT macro
generates the following warning.  This patch suppresses it.

warning: Using plain integer as NULL pointer

Signed-off-by: Ethan Jackson <ethan@nicira.com>
Acked-by: Ben Pfaff <blp@nicira.com>

diff --git a/include/sparse/pthread.h b/include/sparse/pthread.h
index 7ba6a05..723c351 100644 (file)
--- a/include/sparse/pthread.h
+++ b/include/sparse/pthread.h
@@ -33,6 +33,12 @@ int pthread_rwlock_unlock(pthread_rwlock_t *rwlock) OVS_RELEASES(rwlock);
 int pthread_cond_wait(pthread_cond_t *, pthread_mutex_t *mutex)
     OVS_MUST_HOLD(mutex);
 
+/* Sparse complains about the proper PTHREAD_MUTEX_INITIALIZER definition.
+ * Luckily, it's not a real compiler so we can overwrite it with something
+ * simple. */
+#undef PTHREAD_MUTEX_INITIALIZER
+#define PTHREAD_MUTEX_INITIALIZER {}
+
 #define pthread_mutex_trylock(MUTEX)                    \
     ({                                                  \
         int retval = pthread_mutex_trylock(mutex);      \