On Mon, 2006-09-18 at 14:55 +0100, Christoph Hellwig wrote: > > Second, arches may use ZONE_DMA in an unknown way. We set CONFIG_ZONE_DMA > > for all arches that do not set CONFIG_GENERIC_ISA_DMA in order to insure > > backwards compatibility. The arches may later undefine ZONE_DMA > > if their arch code has been verified to not depend on ZONE_DMA. > > Let's pass this on to linux-arch so that the arch maintainers can give input > whether they need ZONE_DMA or not. If this just sneaks in unseen I'd bet > various architectures will just keept it around despite not needing it. s390 needs ZONE_DMA for the memory area below 2GB. That is required for the control structure of channel based I/O. It is not ISA but conceptually related. Can we rename GENERIC_ISA_DMA into GENERIC_IO_DMA or something similar? -- blue skies, Martin. Martin Schwidefsky Linux for zSeries Development & Services IBM Deutschland Entwicklung GmbH "Reality continues to ruin my life." - Calvin. - To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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