linux-kernel - Re: [PATCH v5 1/6] powerpc: Allow flush_icache

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Message-ID: <74435ba6-51dc-1dff-b55b-cdcf85e2e302@c-s.fr>
Date:   Tue, 5 Nov 2019 07:04:04 +0100
From:   Christophe Leroy <christophe.leroy@....fr>
To:     Segher Boessenkool <segher@...nel.crashing.org>,
        Alastair D'Silva <alastair@....ibm.com>
Cc:     David Hildenbrand <david@...hat.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Paul Mackerras <paulus@...ba.org>,
        Nicholas Piggin <npiggin@...il.com>, alastair@...ilva.org,
        Qian Cai <cai@....pw>, Thomas Gleixner <tglx@...utronix.de>,
        linuxppc-dev@...ts.ozlabs.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Allison Randal <allison@...utok.net>
Subject: Re: [PATCH v5 1/6] powerpc: Allow flush_icache_range to work across
 ranges >4GB



Le 04/11/2019 à 20:43, Segher Boessenkool a écrit :
> On Mon, Nov 04, 2019 at 01:32:53PM +1100, Alastair D'Silva wrote:
>> When calling flush_icache_range with a size >4GB, we were masking
>> off the upper 32 bits, so we would incorrectly flush a range smaller
>> than intended.
>>
>> This patch replaces the 32 bit shifts with 64 bit ones, so that
>> the full size is accounted for.
> 
> Please send this separately, to be committed right now?  It is a bug fix,
> independent of the rest of the series.
> 

Patch 4/6 needs it, as it drops the function.

Or do you mean that the series should drop the assembly at once, and 
this patch should only go into stable ?

But I guess mpe can take this patch alone if he wants to ?

By the way, Patch 2/6 is also a bugfix.

Christophe