powerpc/mm/radix: Avoid flushing the PWC on every flush_tlb_range
We do that because it's used by THP pmd collapsing, so use instead a dedicated flush function. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Reviewed-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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