diff options
| author |   Christoph Hellwig <hch@lst.de> | 2020-02-21 12:24:02 -0800 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2020-03-16 10:48:02 +0100 |
| commit | 4f8232bbf887123f78bcdca3dfd2b3dfa52a0112 (patch) | |
| tree | ec534d3d2c43b28cf92423e28abc9fa750416384 /arch/xtensa/kernel | |
| parent | dma-coherent: fix integer overflow in the reserved-memory dma allocation (diff) | |
| download | linux-dev-4f8232bbf887123f78bcdca3dfd2b3dfa52a0112.tar.xz linux-dev-4f8232bbf887123f78bcdca3dfd2b3dfa52a0112.zip | |
dma-direct: remove the cached_kernel_address hook
dma-direct now finds the kernel address for coherent allocations based
on the dma address, so the cached_kernel_address hooks is unused and
can be removed entirely.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Diffstat (limited to 'arch/xtensa/kernel')
| -rw-r--r-- | arch/xtensa/kernel/pci-dma.c | 10 |
1 files changed, 2 insertions, 8 deletions
diff --git a/arch/xtensa/kernel/pci-dma.c b/arch/xtensa/kernel/pci-dma.c index 72b6222daa0b..6a685545d5c9 100644 --- a/arch/xtensa/kernel/pci-dma.c +++ b/arch/xtensa/kernel/pci-dma.c @@ -88,18 +88,12 @@ void arch_dma_prep_coherent(struct page *page, size_t size) /* * Memory caching is platform-dependent in noMMU xtensa configurations. - * The following two functions should be implemented in platform code - * in order to enable coherent DMA memory operations when CONFIG_MMU is not - * enabled. + * This function should be implemented in platform code in order to enable + * coherent DMA memory operations when CONFIG_MMU is not enabled. */ #ifdef CONFIG_MMU void *uncached_kernel_address(void *p) { return p + XCHAL_KSEG_BYPASS_VADDR - XCHAL_KSEG_CACHED_VADDR; } - -void *cached_kernel_address(void *p) -{ - return p + XCHAL_KSEG_CACHED_VADDR - XCHAL_KSEG_BYPASS_VADDR; -} #endif /* CONFIG_MMU */ |