On Wed, Sep 07, 2022 at 04:54:00PM +0200, Greg KH wrote: > On Sun, Sep 04, 2022 at 03:40:58PM -0600, Jim Cromie wrote: > > Demonstrate use of DECLARE_DYNDBG_CLASSMAP macro, and expose them as > > sysfs-nodes for testing. > > Wait, why sysfs? > > sysfs isn't for testing, why not use debugfs? > > > > > > For each of the 4 class-map-types: > > > > - declare a class-map of that type, > > - declare the enum corresponding to those class-names > > - share _base across 0..30 range > > - add a __pr_debug_cls() call for each class-name > > - declare 2 sysnodes for each class-map > > for 'p' flag, and future 'T' flag > > > > These declarations create the following sysfs parameter interface: > > > > :#> pwd > > /sys/module/test_dynamic_debug/parameters > > :#> ls > > T_disjoint_bits T_disjoint_names T_level_names T_level_num do_prints > > p_disjoint_bits p_disjoint_names p_level_names p_level_num > > What is in these files? > > For sysfs stuff, you need Documentation/ABI entries so that you can't > abuse sysfs. With debugfs, you can do anything you want :) Ah, it's just module parameter abuse, not a "normal" sysfs file at all :) Nevermind, sorry for the noise... greg k-h
