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

[Christophe Leroy]

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
> > > smaller
> > > 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
> > > implementation).
> >
> > 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.

Christophe