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Date: Fri, 19 Jan 2018 18:38:44 -0800 From: Linus Torvalds <torvalds@...ux-foundation.org> To: Laura Abbott <labbott@...hat.com> Cc: Tom Lendacky <thomas.lendacky@....com>, Borislav Petkov <bp@...e.de>, Peter Zijlstra <peterz@...radead.org>, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...nel.org>, Brijesh Singh <brijesh.singh@....com>, X86 ML <x86@...nel.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: Re: Boot regression with bacf6b499e11 ("x86/mm: Use a struct to reduce parameters for SME PGD mapping") on top of -rc8 On Fri, Jan 19, 2018 at 5:23 PM, Laura Abbott <labbott@...hat.com> wrote: > > Fedora got multiple reports of an early bootup crash post -rc8. > Bisection showed bacf6b499e11 ("x86/mm: Use a struct to reduce > parameters for SME PGD mapping") . It doesn't revert cleanly > but if I revert the few other changes in arch/x86/mm/mem_encrypt.c > as well it boots up fine. Odd. I've tried to read through that patch three times to find anything it actually changes, and I can't find anything. It looks like that patch should have absolutely no actual behavioral impact. But clearly I'm missing something. Can anybody see what the mistake in the conversion is? Linus
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