Re: [PATCH 1/2] powerpc: Allow flush_icache_range to work across ranges >4GB

From: Christophe Leroy
Date: Mon Aug 12 2019 - 01:41:38 EST

Le 12/08/2019 Ã 03:19, Alastair D'Silva a ÃcritÂ:
On Fri, 2019-08-09 at 10:59 +0200, Christophe Leroy wrote:

Le 09/08/2019 Ã 02:45, Alastair D'Silva a Ãcrit :
From: Alastair D'Silva <alastair@xxxxxxxxxxx>

When calling flush_icache_range with a size >4GB, we were masking
off the upper 32 bits, so we would incorrectly flush a range
than intended.

This patch replaces the 32 bit shifts with 64 bit ones, so that
the full size is accounted for.

Heads-up for backporters: the old version of flush_dcache_range is
subject to a similar bug (this has since been replaced with a C

Can you submit a patch to stable, explaining this ?

This patch was sent to stable too - or did you mean send another patch
for the stable asm version of flush_dcache_range?

Yes I meant a patch for your 'heads-up', in extenso a patch for fixing flush_dcache_range().

And for this patch, you put stable is copy of the mail, but for it to be taken into account it needs to also explicitely include a Cc: stable@xxxxxxxxxxxxxxx in the commit message. I guess Michael will add it for this time.