| Message ID | 20201014191211.27029-9-nsaenzjulienne@suse.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | arm64: Default to 32-bit wide ZONE_DMA | expand |
On Wed, Oct 14, 2020 at 09:12:10PM +0200, Nicolas Saenz Julienne wrote: > The default behavior for arm64 changed, so reflect that. > > Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de> > Acked-by: Catalin Marinas <catalin.marinas@arm.com> > --- > include/linux/mmzone.h | 5 +++-- > 1 file changed, 3 insertions(+), 2 deletions(-) > > diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h > index fb3bf696c05e..4ee2306351b9 100644 > --- a/include/linux/mmzone.h > +++ b/include/linux/mmzone.h > @@ -363,8 +363,9 @@ enum zone_type { > * - arm only uses ZONE_DMA, the size, up to 4G, may vary depending on > * the specific device. > * > - * - arm64 has a fixed 1G ZONE_DMA and ZONE_DMA32 for the rest of the > - * lower 4G. > + * - arm64 uses a single 4GB ZONE_DMA, except on the Raspberry Pi 4, > + * in which ZONE_DMA covers the first GB and ZONE_DMA32 the rest of > + * the lower 4GB. Honestly I think this comment just needs to go away. We can't really list every setup in a comment in common code.
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index fb3bf696c05e..4ee2306351b9 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -363,8 +363,9 @@ enum zone_type { * - arm only uses ZONE_DMA, the size, up to 4G, may vary depending on * the specific device. * - * - arm64 has a fixed 1G ZONE_DMA and ZONE_DMA32 for the rest of the - * lower 4G. + * - arm64 uses a single 4GB ZONE_DMA, except on the Raspberry Pi 4, + * in which ZONE_DMA covers the first GB and ZONE_DMA32 the rest of + * the lower 4GB. * * - powerpc only uses ZONE_DMA, the size, up to 2G, may vary * depending on the specific device.