arm_heavy_mb 57 arch/arm/include/asm/barrier.h extern void arm_heavy_mb(void); arm_heavy_mb 58 arch/arm/include/asm/barrier.h #define __arm_heavy_mb(x...) do { dsb(x); arm_heavy_mb(); } while (0) arm_heavy_mb 33 arch/arm/mm/flush.c EXPORT_SYMBOL(arm_heavy_mb);