lkml.org 
[lkml]   [2019]   [Aug]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH 1/2] powerpc: Allow flush_icache_range to work across ranges >4GB
From
Date
On Fri, 2019-08-09 at 10:59 +0200, Christophe Leroy wrote:
>
> Le 09/08/2019 à 02:45, Alastair D'Silva a écrit :
> > From: Alastair D'Silva <alastair@d-silva.org>
> >
> > 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?

--
Alastair D'Silva
Open Source Developer
Linux Technology Centre, IBM Australia
mob: 0423 762 819

\
 
 \ /
  Last update: 2019-08-12 03:21    [W:6.761 / U:0.012 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site