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Date:   Fri, 20 Nov 2020 09:20:43 -0800
From:   Linus Torvalds <>
To:     Will Deacon <>
Cc:     Linux Kernel Mailing List <>,
        Android Kernel Team <>,
        Catalin Marinas <>,
        Yu Zhao <>, Minchan Kim <>,
        Peter Zijlstra <>,
        Anshuman Khandual <>,
        Linux-MM <>,
        Linux ARM <>
Subject: Re: [PATCH 3/6] tlb: mmu_gather: Remove unused start/end arguments
 from tlb_finish_mmu()

On Fri, Nov 20, 2020 at 6:36 AM Will Deacon <> wrote:
> tlb_finish_mmu() takes two confusing and unused 'start'/'end' address
> arguments. Remove them.

Ack, but please add the history to it.

Those arguments were used, up until 7a30df49f63a ("mm: mmu_gather:
remove __tlb_reset_range() for force flush").

And the thing is, using a range flush in theory might be better, but
for simplicity it's now doing a "fullmm" one, which is why those
arguments no longer matter.

(And I think we track the range better now too, which may be another
reason they aren't needed)



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