On Tue, Feb 09, 2021 at 10:19:07AM +0000, obayashi.yoshimasa@xxxxxxxxxxxxx wrote: > > How do you judge "mature"? > > My basic criteria are > * Function is exist, but bug fix is necessary: "mature" > * Function extension is necessary: "immature" > > > And again, if a feature isn't present in a specific kernel version, why would you think that it would be > > a viable solution for you to use? > > So, "a feature isn't present in a specific kernel version", > also means "immature" according to my criteria. Great, please use the 5.10 or newer kernel release then. thanks, greg k-h