On Thu, 2021-01-14 at 10:43 -0800, Linus Torvalds wrote:

On Thu, Jan 14, 2021 at 12:18 AM Ard Biesheuvel [off-list ref] wrote:

quoted

So if the arguments are piling up, what is holding us back, other than
inertia?

I think we can most certainly just try increasing the minimum version
to 5.1 in the next merge window and see.

quoted

Note that banning 4.9 for arm64 and banning it in general should be
two different changes in any case, as the former will need to be
backported to -stable kernels as well.

Yes. The arm64 issue is a clear and known bug, plus I suspect gcc-4.9
is ridiculously old in the arm64 ecosystem anyway.

So the arm64 issue is a bug-fix, the follow-up of just upgrading gcc
requirements in general would be a "keep up with the times, and allow
those variable declarations in loops".

Given the upgrade requirement, and how clang version requirements
constantly change, how much more difficult would it be for others
to use gcc 7.1 or higher now instead of later?



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