linux-kernel - Re: [RFC PATCH 1/2] zap_pte_range: update addr when forcing flush after TLB batching faiure

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Date:	Wed, 29 Oct 2014 14:11:56 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Will Deacon <will.deacon@....com>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Subject: Re: [RFC PATCH 1/2] zap_pte_range: update addr when forcing flush
 after TLB batching faiure

On Wed, Oct 29, 2014 at 12:47 PM, Will Deacon <will.deacon@....com> wrote:
>
> I've cooked up something (see below), but it unfortunately makes a couple
> of minor changes to powerpc and microblaze to address redefinitions of
> some of the gather callbacks (tlb{start,end}vma, __tlb_remove_tlb_entry).
>
> On the plus side, it tidies up the force_flush case in zap_pte_range
> quite nicely (assuming I didn't screw it up again).

Yes, this looks fine to me. Looks like a good cleanup, and moves more
code to generic headers rather than having arch-specific stuff.

Ben, can you check that this is ok on powerpc? Who else should
double-check this due to having been involved in tlb flushing? But I
think this is good to go, modulo checking other architectures for
sanity.

                    Linus
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