Re: I botched the b67fbebd4cf9 (VM_PFNMAP TLB flush) stable backport, how do I have to fix it?

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On Thu, Sep 15, 2022 at 12:48:44PM +0200, Jann Horn wrote:
> Hi!
> 
> Hugh reached out to me and let me know (in nicer words) that I botched
> my attempt to re-implement b67fbebd4cf9 for the stable backport; the
> backport is an incomplete fix (because I forgot that in
> unmap_region(), "vma" is just one of potentially several VMAs).
> 
> What should the commit message for fixing that look like? And should
> we first revert the botched backport and then do a correct backport on
> top of that, or should I write a single fix commit?

Which every you want is fine with me, I can easily add 1 or 2 patches :)

If you want do the revert now, and get a release out with that, and then
do a "better" patch later, that's fine too, just let me know what you
want to do.

thanks,

greg k-h



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