On (12/04/16 12:28), Greg KH wrote: > > [..] > > > > > Why can't a normal user read the attribute? Does a read actually modify > > > something? > > > > yes, it does. > > Oh that's totally and completely broken then. > > Reading from a sysfs file should NEVER cause side affects to the system. > Please fix up this api. we have a mechanism for such API changes -- there is a bunch of deprecated sysfs attrs that we will remove in 4.11; so I'll mark hot_add/hot_remove as deprecated and switch to char device (as you suggested). thanks. -ss -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html