__ASM_BARRIER      24 arch/s390/include/asm/barrier.h #define mb() do {  asm volatile(__ASM_BARRIER : : : "memory"); } while (0)
__ASM_BARRIER      26 tools/arch/s390/include/asm/barrier.h #define mb() do {  asm volatile(__ASM_BARRIER : : : "memory"); } while (0)