On Tue, May 24, 2011 at 04:53:45PM -0700, David Rientjes wrote:
> dasd=fixedbuffers must create a SLAB_CACHE_DMA cache, which is not
> possible if CONFIG_ZONE_DMA is disabled (a supported configuration
> without 64-bit support).
>
> If passed, emit a warning and disable fixed buffer mode.
>
> Signed-off-by: David Rientjes <rientjes@xxxxxxxxxx>
What's the reasoning here?
On s390 for !CONFIG_64BIT ZONE_DMA would be equal to ZONE_NORMAL,
that's why we only have ZONE_NORMAL. So I don't see that something
wouldn't work...
> ---
> drivers/s390/block/dasd_devmap.c | 5 +++++
> 1 files changed, 5 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/s390/block/dasd_devmap.c b/drivers/s390/block/dasd_devmap.c
> --- a/drivers/s390/block/dasd_devmap.c
> +++ b/drivers/s390/block/dasd_devmap.c
> @@ -282,6 +282,11 @@ dasd_parse_keyword( char *parsestring ) {
> return residual_str;
> }
> if (strncmp("fixedbuffers", parsestring, length) == 0) {
> +#ifndef CONFIG_ZONE_DMA
> + DBF_EVENT(DBF_WARNING, "%s", "DMA support disabled, "
> + "fixed buffer mode disabled.");
> + return residual_str;
> +#endif
> if (dasd_page_cache)
> return residual_str;
> dasd_page_cache =
--
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