lkml.org 
[lkml]   [2019]   [Sep]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRE: [PATCH v2 1/6] powerpc: Allow flush_icache_range to work across ranges >4GB
On Sat, 2019-09-14 at 09:46 +0200, Christophe Leroy wrote:
>
> Le 03/09/2019 à 07:23, 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.
>
> Isn't there the same issue in arch/powerpc/kernel/vdso64/cacheflush.S
> ?
>
> Christophe

Yes, there is. I'll fix it, but I wonder whether anything calls it? I
asked Google, and every mention of it was in the kernel source or
mailing list.

Maybe BenH can chime in?

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

\
 
 \ /
  Last update: 2019-09-16 05:27    [W:0.054 / U:0.356 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site