The patch titled
Subject: arch/openrisc: add option to skip DMA sync as a part of mapping
has been removed from the -mm tree. Its filename was
arch-openrisc-add-option-to-skip-dma-sync-as-a-part-of-mapping.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Alexander Duyck <alexander.h.duyck@xxxxxxxxx>
Subject: arch/openrisc: add option to skip DMA sync as a part of mapping
This change allows us to pass DMA_ATTR_SKIP_CPU_SYNC which allows us to
avoid invoking cache line invalidation if the driver will just handle it
via a sync_for_cpu or sync_for_device call.
Link: http://lkml.kernel.org/r/20161110113524.76501.87966.stgit@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Alexander Duyck <alexander.h.duyck@xxxxxxxxx>
Cc: Jonas Bonn <jonas@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/openrisc/kernel/dma.c | 3 +++
1 file changed, 3 insertions(+)
diff -puN arch/openrisc/kernel/dma.c~arch-openrisc-add-option-to-skip-dma-sync-as-a-part-of-mapping arch/openrisc/kernel/dma.c
--- a/arch/openrisc/kernel/dma.c~arch-openrisc-add-option-to-skip-dma-sync-as-a-part-of-mapping
+++ a/arch/openrisc/kernel/dma.c
@@ -141,6 +141,9 @@ or1k_map_page(struct device *dev, struct
unsigned long cl;
dma_addr_t addr = page_to_phys(page) + offset;
+ if (attrs & DMA_ATTR_SKIP_CPU_SYNC)
+ return addr;
+
switch (dir) {
case DMA_TO_DEVICE:
/* Flush the dcache for the requested range */
_
Patches currently in -mm which might be from alexander.h.duyck@xxxxxxxxx are
--
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
