>Set compatibility flag for 4GB zone on IA64
>
>IA64 traditionally had a 4GB DMA32 zone. Set the compatibility flag
>to keep old drivers working.
>
>For new drivers it would be better to use ZONE_DMA32 now.
>
>Signed-off-by: Andi Kleen <[email protected]>
>Cc: [email protected]
>
>Index: linux/arch/ia64/Kconfig
>===================================================================
>--- linux.orig/arch/ia64/Kconfig
>+++ linux/arch/ia64/Kconfig
>@@ -54,6 +54,10 @@ config IA64_UNCACHED_ALLOCATOR
> bool
> select GENERIC_ALLOCATOR
>
>+config ZONE_DMA_IS_DMA32
>+ bool
>+ default y
>+
> choice
> prompt "System type"
> default IA64_GENERIC
>
ia64 isn't all that homogeneous. SGI systems stuff *all* memory
into the DMA zone as their I/O devices have no 32-bit limits (just
as well really as there is no memory below 4G on an Altix!).
What does this ZONE_DMA_IS_DMA32 thing do?
-Tony
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