linux/arch/csky/kernel/io.c, branch v6.2Mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/
https://git.shady.money/linux/atom?h=v6.22022-04-18T13:23:55Zcsky: optimize memcpy_{from,to}io() and memset_io()2022-04-18T13:23:55ZGuo Renguoren@linux.alibaba.com2022-04-06T13:32:22Zurn:sha1:8318f7c231d5be09e47410c5ab387b9bef6fe19e
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 & arm64.
Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Signed-off-by: Guo Ren <guoren@kernel.org>