[PATCH 2/2] membarrier: riscv: Provide core serializing command

[Andrea Parri]

> I see
> 
> $ git grep "config MEMBARRIER" fab957c11efe2f405e08b9f0d080524bc2631428
> fab957c11efe2f405e08b9f0d080524bc2631428:init/Kconfig:config MEMBARRIER
> 
> so IMO this is just one of those forever bugs.  So I'd lean towards
> 
>    Fixes: fab957c11efe ("RISC-V: Atomic and Locking Code")

Works for me, will apply in v2.


> (or anything in that original patch set).  It's not that big of a backport,
> so I think it's safe enough?

Indeed, I think so.

The final version of this fix will likely depend on some machinery/code
introduced by 3ccfebedd8cf54 ("powerpc, membarrier: Skip memory barrier
in switch_mm()"); but, yes, nothing we can't safely adjust I think.

Thanks,
  Andrea