Guo Ren 22d55f02b8 csky: Use generic asid algorithm to implement switch_mm ...

Use linux generic asid/vmid algorithm to implement csky
switch_mm function. The algorithm is from arm and it could
work with SMP system. It'll help reduce tlb flush for
switch_mm in task/vm switch.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Cc: Arnd Bergmann <arnd@arndb.de>

2019-07-19 14:21:36 +08:00

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