Re: [PATCH stable 5.10 0/3] ARM FDT relocation backports
From: Linus Walleij <hidden>
Date: 2021-05-10 09:37:18
Also in:
linux-doc, lkml, stable
On Mon, May 10, 2021 at 9:43 AM Greg Kroah-Hartman [off-list ref] wrote:
On Sun, May 09, 2021 at 06:22:05PM -0700, Florian Fainelli wrote:
quoted
This does not qualify as a regression in that it has never worked for the specific platform that I have shown above until your 3 commits came in and fixed that particular FDT placement. To me this qualifies as a bug fix, and given that the 3 (now 4) commits applied without hunks, it seems reasonable to me to back port those to stable.As this isn't a regression, why not just use 5.12 on these platforms? Why is 5.4 and 5.10 needed?
Actually I think it *is* a regression, but not a common one. The bug that Ard is fixing can appear when the kernel grows over a certain size. If a user compile in a new set of functionality and the kernel size reach a tripping point so that the DTB ends up just outside the 1:1 lowmem map, disaster strikes. This has been a long standing mysterious bug for people using attached device trees. Yours, Linus Walleij _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel