[PATCH V2] arm64: optimized copy_to_user and copy_from_user assembly code
From: Feng Kan <hidden>
Date: 2014-08-11 18:05:23
On Sun, Aug 10, 2014 at 8:01 PM, Radha Mohan [off-list ref] wrote:
Hi Feng,quoted
+ +.Lcpy_not_short: + /* + * We don't much care about the alignment of DST, but we want SRC + * to be 128-bit (16 byte) aligned so that we don't cross cache line + * boundaries on both loads and stores. + */Could you please tell why is destination alignment not an issue? Is this a generic implementation that you are referring to or specific to your platform?
This is per Linaro Cortext String optimization routines. https://launchpad.net/cortex-strings Zhichang submitted something similar for the memcpy from the same optimization. Sorry resend in text mode.
quoted
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