powerpc/mm: Remove flush_HPTE()

The function flush_HPTE() is used in only one place, the implementation
of DEBUG_PAGEALLOC on ppc32.

It's actually a dup of flush_tlb_page() though it's -slightly- more
efficient on hash based processors.  We remove it and replace it by
a direct call to the hash flush code on those processors and to
flush_tlb_page() for everybody else.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 5 insertions, 1 deletions

diff --git a/arch/powerpc/mm/pgtable_32.c b/arch/powerpc/mm/pgtable_32.c
index c7b755cba26a..341472440137 100644
--- a/arch/powerpc/mm/pgtable_32.c
+++ b/arch/powerpc/mm/pgtable_32.c
@@ -342,7 +342,11 @@ static int __change_page_attr(struct page *page, pgprot_t prot)
                 return -EINVAL;
         set_pte_at(&init_mm, address, kpte, mk_pte(page, prot));
         wmb();
-        flush_HPTE(0, address, pmd_val(*kpmd));
+#ifdef CONFIG_PPC_STD_MMU
+        flush_hash_pages(0, address, pmd_val(*kpmd), 1);
+#else
+        flush_tlb_page(NULL, address);
+#endif
         pte_unmap(kpte);
 
         return 0;