[Bug 215740] kernel warning: DMA-API: xhci_hcd: cacheline tracking EEXIST, overlapping mappings aren't supported

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https://bugzilla.kernel.org/show_bug.cgi?id=215740

--- Comment #33 from Alan Stern (stern@xxxxxxxxxxxxxxxxxxx) ---
It should not be necessary to use dma_kmalloc_size_aligned().  These
allocations don't need any special alignment; they just need to be in different
cache lines on some architectures.  Isn't this what ARCH_DMA_MINALIGN and
ARCH_KMALLOC_MINALIGN are supposed to take care of (see include/linux/slab.h)?

I'll try doing a little more testing to find out why the issue does not show up
on my computer.

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