hi folks, I would like to add something like the following: MOD_PARM_DYNDBG_BITMAP_DESC(__gvt_debug, "dyndbg bitmap desc", { "gvt: cmd: ", "command processing" }, { "gvt: core: ", "core help" }, { "gvt: dpy: ", "display help" }, { "gvt: el: ", "help" }, { "gvt: irq: ", "help" }, { "gvt: mm: ", "help" }, { "gvt: mmio: ", "help" }, { "gvt: render: ", "help" }, { "gvt: sched: " "help" }); the point is to declaratively define an interface, a lot like: /sys/module/drm/parameters/debug and $> modinfo drm ... parm: debug:Enable debug output, where each bit enables a debug category. Bit 0 (0x01) will enable CORE messages (drm core code) Bit 1 (0x02) will enable DRIVER messages (drm controller code) Bit 2 (0x04) will enable KMS messages (modesetting code) Bit 3 (0x08) will enable PRIME messages (prime code) Bit 4 (0x10) will enable ATOMIC messages (atomic code) Bit 5 (0x20) will enable VBL messages (vblank code) Bit 7 (0x80) will enable LEASE messages (leasing code) Bit 8 (0x100) will enable DP messages (displayport code) (int) is there anything close to this in the kernel that I can copy & modify ? failing that, what set of macros (names & files they should be implemented in ) would stand some chance of surviving review ?