VMW_BALLOON_OP_FAIL_STAT
#define VMW_BALLOON_OP_STAT_TYPES (VMW_BALLOON_OP_FAIL_STAT + 1)
atomic64_read(&b->stats->ops[i][VMW_BALLOON_OP_FAIL_STAT]));
vmballoon_stats_op_inc(b, cmd, VMW_BALLOON_OP_FAIL_STAT);