linux-stable.git/arch/csky/kernel/io.c, branch master Linux kernel stable tree csky: Use new fallback IO memcpy/memset 2024-10-28T21:44:29+00:00 Julian Vetter jvetter@kalrayinc.com 2024-10-28T13:42:26+00:00 4c9397cf292f357fe13f3c7cd9f53240d062c18e Use the new fallback memcpy_{from,to}io and memset_io functions from lib/iomem_copy.c on the csky processor architecture. Acked-by: Guo Ren <guoren@kernel.org> Reviewed-by: Yann Sionneau <ysionneau@kalrayinc.com> Signed-off-by: Julian Vetter <jvetter@kalrayinc.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de> 
Use the new fallback memcpy_{from,to}io and memset_io functions from
lib/iomem_copy.c on the csky processor architecture.

Acked-by: Guo Ren <guoren@kernel.org>
Reviewed-by: Yann Sionneau <ysionneau@kalrayinc.com>
Signed-off-by: Julian Vetter <jvetter@kalrayinc.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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>