__io_bw           149 arch/riscv/include/asm/io.h #define __io_bw()	__asm__ __volatile__ ("fence w,o" : : : "memory");
__io_bw            37 include/asm-generic/io.h #define __io_bw()      wmb()
__io_bw            39 include/asm-generic/io.h #define __io_bw()      barrier()