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>
---
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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