__io_ar           148 arch/riscv/include/asm/io.h #define __io_ar(v)	__asm__ __volatile__ ("fence i,r" : : : "memory");
__io_ar            28 include/asm-generic/io.h #define __io_ar(v)      rmb()
__io_ar            30 include/asm-generic/io.h #define __io_ar(v)      barrier()