linux.git/arch/csky/kernel/io.c, branch v6.0 Linux kernel source tree csky: optimize memcpy_{from,to}io() and memset_io() 2022-04-18T13:23:55+00:00 Guo Ren guoren@linux.alibaba.com 2022-04-06T13:32:22+00:00 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> 
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>