KBUILD_MODNAME
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
.exp_name = KBUILD_MODNAME, /* white lie for debug */
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#define _TUNABLE_PREFIX __stringify(KBUILD_MODNAME)