On Fri, Nov 30, 2018 at 07:05:40PM +0000, Robin Murphy wrote: > On 05/11/2018 12:19, Christoph Hellwig wrote: >> Do not waste vmalloc space on allocations that do not require a mapping >> into the kernel address space. >> >> Signed-off-by: Christoph Hellwig <[email protected]> >> --- >> kernel/dma/remap.c | 11 +++++++++-- >> 1 file changed, 9 insertions(+), 2 deletions(-) >> >> diff --git a/kernel/dma/remap.c b/kernel/dma/remap.c >> index 8f1fca34b894..10a545126b0b 100644 >> --- a/kernel/dma/remap.c >> +++ b/kernel/dma/remap.c >> @@ -200,7 +200,8 @@ void *arch_dma_alloc(struct device *dev, size_t size, >> dma_addr_t *dma_handle, >> size = PAGE_ALIGN(size); >> - if (!gfpflags_allow_blocking(flags)) { >> + if (!gfpflags_allow_blocking(flags) && >> + !(attrs & DMA_ATTR_NO_KERNEL_MAPPING)) { >> ret = dma_alloc_from_pool(size, &page, flags); >> if (!ret) >> return NULL; >> @@ -215,6 +216,9 @@ void *arch_dma_alloc(struct device *dev, size_t size, >> dma_addr_t *dma_handle, >> /* remove any dirty cache lines on the kernel alias */ >> arch_dma_prep_coherent(page, size); >> + if (attrs & DMA_ATTR_NO_KERNEL_MAPPING) >> + return page; /* opaqueue cookie */ > > Best to preempt the inevitable patch fixing that typo in 3 months' time. > Otherwise,
Thanks, fixed. _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
