RE: [PATCH v2 1/6] powerpc: Allow flush_icache_range to work across ranges >4GB

[Alastair D'Silva]

On Sat, 2019-09-14 at 09:46 +0200, Christophe Leroy wrote:
> 
> Le 03/09/2019 Ã 07:23, 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.
> 
> 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