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由 Joonwoo Park 提交于
Optimize memcpy_{from,to}io() and memset_io() by transferring in 64 bit as much as possible with minimized barrier usage. This simplest optimization brings faster throughput compare to current byte-by-byte read and write with barrier in the loop. Code's skeleton is taken from the powerpc. Link: http://lkml.kernel.org/p/20141020133304.GH23751@e104818-lin.cambridge.arm.comReviewed-by: NCatalin Marinas <catalin.marinas@arm.com> Reviewed-by: NTrilok Soni <tsoni@codeaurora.org> Signed-off-by: NJoonwoo Park <joonwoop@codeaurora.org> Signed-off-by: NWill Deacon <will.deacon@arm.com>
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