SMPWMB             49 arch/powerpc/include/asm/barrier.h #define dma_wmb()	__asm__ __volatile__ (stringify_in_c(SMPWMB) : : :"memory")
SMPWMB             55 arch/powerpc/include/asm/barrier.h #define __smp_wmb()	__asm__ __volatile__ (stringify_in_c(SMPWMB) : : :"memory")