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-rw-r--r--arch/arm/atomic_arch.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm/atomic_arch.h b/arch/arm/atomic_arch.h
index a121010f..c5c56f81 100644
--- a/arch/arm/atomic_arch.h
+++ b/arch/arm/atomic_arch.h
@@ -82,9 +82,13 @@ static inline void a_crash()
: : : "memory");
}
+#if __ARM_ARCH >= 5
+
#define a_clz_32 a_clz_32
static inline int a_clz_32(uint32_t x)
{
__asm__ ("clz %0, %1" : "=r"(x) : "r"(x));
return x;
}
+
+#endif