Messages in this thread | | | From | Linus Torvalds <> | Date | Thu, 11 Jan 2018 12:17:31 -0800 | Subject | Re: [PATCH 4.4 00/37] 4.4.110-stable review |
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On Thu, Jan 11, 2018 at 12:10 PM, Greg Kroah-Hartman <gregkh@linuxfoundation.org> wrote: > > Nice, but why does this not show up in 4.9 and 4.14 and Linus's tree as > well on this hardware? Nor on the SLES12 SP3 kernel? > > What is different there that 4.4 requires? That worries me more than > your fix (which looks good to me, fwiw.)
I really think it's simply that since v4.6, we've had commit 67a9108ed431 ("x86/efi: Build our own page table structures"), so no normal EFI use actually uses the old legacy mapping unless you passed in "efi=old_map" on the kernel command line.
So the bug is there in all versions, it's just that it's normally only noticeable in 4.4.
But I might be missing some other difference, so take that with a pinch of salt.
Linus
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