[PATCH] arm64: Don't report clear pmds and puds as huge
marc.zyngier at arm.com
Wed Jul 1 06:07:12 PDT 2015
On 01/07/15 13:08, Christoffer Dall wrote:
> The current pmd_huge() and pud_huge() functions simply check if the table
> bit is not set and reports the entries as huge in that case. This is
> counter-intuitive as a clear pmd/pud cannot also be a huge pmd/pud, and
> it is inconsistent with at least arm and x86.
> To prevent others from making the same mistake as me in looking at code
> that calls these functions and to fix an issue with KVM on arm64 that
> causes memory corruption due to incorrect page reference counting
> resulting from this mistake, let's change the behavior.
> Cc: stable at vger.kernel.org
> Signed-off-by: Christoffer Dall <christoffer.dall at linaro.org>
Acked-by: Marc Zyngier <marc.zyngier at arm.com>
Jazz is not dead. It just smells funny...
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