[DO NOT LAND] Toggle have_futex

third_party/tcmalloc/chromium/src/base/spinlock_linux-inl.h

Index: third_party/tcmalloc/chromium/src/base/spinlock_linux-inl.h
diff --git a/third_party/tcmalloc/chromium/src/base/spinlock_linux-inl.h b/third_party/tcmalloc/chromium/src/base/spinlock_linux-inl.h
index 2f2ca4736bb00664557d36de71cd3c595cc90ebe..c78c2d23bd73aaf6e2bf88f482d2bc4d5b211e48 100644
--- a/third_party/tcmalloc/chromium/src/base/spinlock_linux-inl.h
+++ b/third_party/tcmalloc/chromium/src/base/spinlock_linux-inl.h
@@ -61,8 +61,8 @@ static struct InitModule {
     int x = 0;
     // futexes are ints, so we can use them only when
     // that's the same size as the lockword_ in SpinLock.
-    have_futex = (sizeof (Atomic32) == sizeof (int) && 
-                  syscall(__NR_futex, &x, FUTEX_WAKE, 1, 0) >= 0);
+    have_futex = !(sizeof(Atomic32) == sizeof(int) &&
+                   syscall(__NR_futex, &x, FUTEX_WAKE, 1, 0) >= 0);
     if (have_futex &&
         syscall(__NR_futex, &x, FUTEX_WAKE | futex_private_flag, 1, 0) < 0) {
       futex_private_flag = 0;