NVDIMM_IO_ATOMIC
ret = arena_read_bytes(arena, nsoff, mem + off, len, NVDIMM_IO_ATOMIC);
ret = arena_write_bytes(arena, nsoff, mem + off, len, NVDIMM_IO_ATOMIC);
NVDIMM_IO_ATOMIC);
NVDIMM_IO_ATOMIC);
NVDIMM_IO_ATOMIC);
&new_e, NVDIMM_IO_ATOMIC);
if (btt_map_write(arena, premap, postmap, 0, 1, NVDIMM_IO_ATOMIC))
NVDIMM_IO_ATOMIC);
NVDIMM_IO_ATOMIC);
ret = __btt_log_write(arena, lane, sub, ent, NVDIMM_IO_ATOMIC);
&& !(flags & NVDIMM_IO_ATOMIC)) {