On Sun, Oct 03, 2021 at 10:53:38PM +0200, Marek Behún wrote: > Hello Greg, > > could you give your opinion on this discussion? What discussion? Top posting ruins that :( > Are device names (as returned by dev_name() function) also part of > sysfs ABI? Should these names be stable across reboots / kernel > upgrades? Stable in what exact way? Numbering of devices (where a dynamic value is part of a name, like the "42" in "usb42"), is never guaranteed to be stable, but the non-number part of the name (like "usb" is in "usb42") is stable, as that is what you have properly documented in the Documentation/ABI/ files defining the bus and class devices, right? The very reason we export all of this information to userspace is so that userspace can figure it all out in ways it wants to, if it wants to, and no naming scheme that has to be static and deterministic is forced into the kernel, where it does NOT belong. That is 1/2 of the reason why we created the whole "unified device/driver model" in the kernel in the first place all those years ago. Does that help? I can't figure out what the "problem" is here... thanks, greg k-h
