On Wed, 3 May 2017 14:44:59 +1000 Michael Ellerman <m...@ellerman.id.au> wrote:
> Currently the radix TLB code includes support for CPUs that do *not* > have MMU_FTR_LOCKLESS_TLBIE. On those CPUs we are required to take a > global spinlock before issuing a tlbie. > > Radix can only be built for 64-bit Book3s CPUs, and of those, only > POWER4, 970, Cell and PA6T do not have MMU_FTR_LOCKLESS_TLBIE. Although > it's possible to build a kernel with Radix support that can also boot on > those CPUs, we happen to know that in reality none of those CPUs support > the Radix MMU, so the code can never actually run on those CPUs. > > So remove the native_tlbie_lock in the Radix TLB code. > > Note that there is another lock of the same name in the hash code, which > is unaffected by this patch. > > Signed-off-by: Michael Ellerman <m...@ellerman.id.au> Good idea. Reviewed-by: Nicholas Piggin <npig...@gmail.com>
