RE: [PATCH 1/4] add is_buffer_dma_capable helper function

[Luck, Tony]

+static inline int is_buffer_dma_capable(u64 mask, dma_addr_t addr, size_t size)
+{
+       return addr + size <= mask;
+}

Do we care about wrap-around (e.g. addr=0xffffffffffffffff size=2)?

-Tony
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