diff options
| author |   Christoph Hellwig <hch@lst.de> | 2018-07-27 19:26:06 +0200 |
|---|---|---|
| committer |   Paul Burton <paul.burton@mips.com> | 2018-07-27 15:19:59 -0700 |
| commit | a999933db9ed44f8501e0241f7f1fbdf36554396 (patch) | |
| tree | 582181edf96f6389672c90b94654dd6acbaa9aaf /arch/mips/mm/Makefile | |
| parent | MIPS: WARN_ON invalid DMA cache maintenance, not BUG_ON (diff) | |
| download | linux-dev-a999933db9ed44f8501e0241f7f1fbdf36554396.tar.xz linux-dev-a999933db9ed44f8501e0241f7f1fbdf36554396.zip | |
MIPS: remove mips_swiotlb_ops
mips_swiotlb_ops differs from the generic swiotlb_dma_ops only in that
it contains a mb() barrier after each operations that maps or syncs
dma memory to the device.
The dma operations are defined to not be memory barriers, but instead
the write* operations to kick the DMA off are supposed to contain them.
For mips this handled by war_io_reorder_wmb(), which evaluates to the
stronger wmb() instead of the pure compiler barrier barrier() for
just those platforms that use swiotlb, so I think we are covered
properly.
[paul.burton@mips.com:
- Include linux/swiotlb.h to fix build failures for configs with
CONFIG_SWIOTLB=y.]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Paul Burton <paul.burton@mips.com>
Patchwork: https://patchwork.linux-mips.org/patch/20038/
Cc: David Daney <ddaney@caviumnetworks.com>
Cc: Huacai Chen <chenhc@lemote.com>
Cc: linux-mips@linux-mips.org
Cc: iommu@lists.linux-foundation.org
Cc: linux-kernel@vger.kernel.org
Diffstat (limited to 'arch/mips/mm/Makefile')
| -rw-r--r-- | arch/mips/mm/Makefile | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/mips/mm/Makefile b/arch/mips/mm/Makefile index 6922f393af19..3e5bb203c95a 100644 --- a/arch/mips/mm/Makefile +++ b/arch/mips/mm/Makefile @@ -18,7 +18,6 @@ obj-$(CONFIG_64BIT) += pgtable-64.o obj-$(CONFIG_HIGHMEM) += highmem.o obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o obj-$(CONFIG_DMA_NONCOHERENT) += dma-noncoherent.o -obj-$(CONFIG_SWIOTLB) += dma-swiotlb.o obj-$(CONFIG_CPU_R4K_CACHE_TLB) += c-r4k.o cex-gen.o tlb-r4k.o obj-$(CONFIG_CPU_R3000) += c-r3k.o tlb-r3k.o |