linux-kernel - Re: [PATCH] powerpc/32s: Don't flush all TLBs when flushing one page

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Message-ID: <20200201161737.GO22482@gate.crashing.org>
Date:   Sat, 1 Feb 2020 10:17:37 -0600
From:   Segher Boessenkool <segher@...nel.crashing.org>
To:     Christophe Leroy <christophe.leroy@....fr>
Cc:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] powerpc/32s: Don't flush all TLBs when flushing one page

On Sat, Feb 01, 2020 at 03:53:12PM +0100, Christophe Leroy wrote:
> >>No, in end the low bits are set, that's a BIT OR with ~PAGE_MASK, so it
> >>sets all low bits to 1.
> >
> >Oh, wow, yes, I cannot read apparently.
> >
> >Maybe there are some ROUND_DOWN and ROUND_UP macros you could use?
> 
> Yes but my intention was to modify the existing code as less as possible.
> What do you think about version v2 of the patch ?

It looked fine to me.

Add my

Reviewed-by: Segher Boessenkool <segher@...nel.crashing.org>

if you want.


Segher