Fix more warnings.

Source/wtf/PageAllocator.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 13 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "wtf/PageAllocator.h"
 
+#include "wtf/Assertions.h"
 #include "wtf/ProcessID.h"
 #include "wtf/SpinLock.h"
 
 #if OS(POSIX)
 
 #include <sys/mman.h>
 
 #ifndef MADV_FREE
 #define MADV_FREE MADV_DONTNEED
 #endif
@@ skipping 18 matching lines @@
     ASSERT(!(reinterpret_cast<uintptr_t>(addr) & kSuperPageOffsetMask));
 #if OS(POSIX)
     char* ptr = reinterpret_cast<char*>(mmap(addr, len, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0));
     RELEASE_ASSERT(ptr != MAP_FAILED);
     // If our requested address collided with another mapping, there's a
     // chance we'll get back an unaligned address. We fix this by attempting
     // the allocation again, but with enough slack pages that we can find
     // correct alignment within the allocation.
     if (UNLIKELY(reinterpret_cast<uintptr_t>(ptr) & kSuperPageOffsetMask)) {
         int ret = munmap(ptr, len);
-        ASSERT(!ret);
+        ASSERT_UNUSED(ret, !ret);
         ptr = reinterpret_cast<char*>(mmap(0, len + kSuperPageSize - kSystemPageSize, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0));
         RELEASE_ASSERT(ptr != MAP_FAILED);
         int numSystemPagesToUnmap = kNumSystemPagesPerSuperPage - 1;
         int numSystemPagesBefore = (kNumSystemPagesPerSuperPage - ((reinterpret_cast<uintptr_t>(ptr) & kSuperPageOffsetMask) / kSystemPageSize)) % kNumSystemPagesPerSuperPage;
         ASSERT(numSystemPagesBefore <= numSystemPagesToUnmap);
         int numSystemPagesAfter = numSystemPagesToUnmap - numSystemPagesBefore;
         if (numSystemPagesBefore) {
             size_t beforeSize = kSystemPageSize * numSystemPagesBefore;
             ret = munmap(ptr, beforeSize);
             ASSERT(!ret);
@@ skipping 158 matching lines @@
     ASSERT(byteIndex < sizeof(s_bitmap));
     // The read/modify/write is not guaranteed atomic, so take a lock.
     spinLockLock(&bitmapLock);
     s_bitmap[byteIndex] &= ~(1 << bit);
     spinLockUnlock(&bitmapLock);
 }
 #endif
 
 } // namespace WTF