tree 830915f73d05e7d094d2f293a712e05c0da1e6f5
parent cc1f6563a92ced0889775d0587316d725b6e1a68
author Guo Ren <guoren@linux.alibaba.com> 1580473990 +0800
committer Guo Ren <guoren@linux.alibaba.com> 1582271004 +0800

csky: Add flush_icache_mm to defer flush icache all

Some CPUs don't support icache.va instruction to maintain the whole
smp cores' icache. Using icache.all + IPI casue a lot on performace
and using defer mechanism could reduce the number of calling icache
_flush_all functions.

Signed-off-by: Guo Ren <guoren@linux.alibaba.com>