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--- a/include/jemalloc/internal/jemalloc_internal_defs-linux.h (index)
+++ b/include/jemalloc/internal/jemalloc_internal_defs-linux.h (working tree)
@@ -33,9 +33,14 @@
* Hyper-threaded CPUs may need a special instruction inside spin loops in
* order to yield to another virtual CPU.
*/
+#if defined(__i386__) || defined(__amd64__)
#define CPU_SPINWAIT __asm__ volatile("pause")
/* 1 if CPU_SPINWAIT is defined, 0 otherwise. */
#define HAVE_CPU_SPINWAIT 1
+#else
+#define CPU_SPINWAIT
+#define HAVE_CPU_SPINWAIT 0
+#endif
/*
* Number of significant bits in virtual addresses. This may be less than the
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