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--- base/allocator/partition_allocator/partition_alloc_config.h.orig 2021-07-19 18:45:05 UTC
+++ base/allocator/partition_allocator/partition_alloc_config.h
@@ -46,9 +46,13 @@ static_assert(sizeof(void*) != 8, "");
#define PA_HAS_LINUX_KERNEL
#endif
+#if defined(OS_FREEBSD)
+#define PA_HAS_FREEBSD_KERNEL
+#endif
+
// SpinningMutex uses either futex(2) on Linux, or a fast userspace "try"
// operation, which is available on Windows.
-#if defined(PA_HAS_LINUX_KERNEL) || defined(OS_WIN)
+#if defined(PA_HAS_LINUX_KERNEL) || defined(PA_HAS_FREEBSD_KERNEL) || defined(OS_WIN)
#define PA_HAS_SPINNING_MUTEX
#endif
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