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

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Date:   Mon, 4 Nov 2019 13:43:57 -0600
From:   Segher Boessenkool <segher@...nel.crashing.org>
To:     "Alastair D'Silva" <alastair@....ibm.com>
Cc:     alastair@...ilva.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        David Hildenbrand <david@...hat.com>,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Paul Mackerras <paulus@...ba.org>,
        Nicholas Piggin <npiggin@...il.com>, 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

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.


Segher