Changes in kernel/arch/arm32/include/asm.h [7a0359b:7c13c55] in mainline

File:

• kernel/arch/arm32/include/asm.h (modified) (1 diff)

kernel/arch/arm32/include/asm.h

@@ -43 +43 @@
 #include <trace.h>
 
-/** No such instruction on ARM to sleep CPU. */
+/** No such instruction on ARM to sleep CPU.
+ *
+ * ARMv7 introduced wait for event and wait for interrupt.
+ */
 NO_TRACE static inline void cpu_sleep(void)
 {
+#ifdef PROCESSOR_armv7
+        asm volatile (
+                "wfe"::
+        );
+#endif
 }