fix yet another bug

Author: Yifan Zhu

libc/src/__support/threads/linux/rwlock.h

@@ -65,7 +65,7 @@ class WaitingQueue final : private RawMutex {
 
     LIBC_INLINE constexpr Guard(WaitingQueue &queue, bool is_pshared)
         : queue(queue), is_pshared(is_pshared) {
-      queue.lock();
+      queue.lock(cpp::nullopt, is_pshared);
     }
 
   public:
@@ -91,7 +91,6 @@ class WaitingQueue final : private RawMutex {
         reader_serialization(0), writer_serialization(0) {}
 
   LIBC_INLINE Guard acquire(bool is_pshared) {
-    this->lock();
     return Guard(*this, is_pshared);
   }
 

libc/test/integration/src/pthread/pthread_rwlock_test.cpp

@@ -350,7 +350,7 @@ randomized_process_operation(SharedData &data,
     ASSERT_EQ(LIBC_NAMESPACE::pthread_create(
                   &i, nullptr,
                   [](void *arg) -> void * {
-                    for (int i = 0; i < 5; ++i)
+                    for (int i = 0; i < 10; ++i)
                       randomized_thread_operation(
                           reinterpret_cast<SharedData *>(arg));
                     return nullptr;