powerpc/radix: Update MMU cache

With radix there is no MMU cache. Hence we don't need to do anything in
update_mmu_cache().

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Acked-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index ac79dbde1015ba090e30718c77759c4ec10498ed..89677884ecc85e35a1f524aec3143d22b8df631e 100644 (file)
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -499,6 +499,8 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
         * called with either mm->page_table_lock held or ptl lock held
         */
        unsigned long access = 0, trap;
+       if (radix_enabled())
+               return;
 
        /* We only want HPTEs for linux PTEs that have _PAGE_ACCESSED set */
        if (!pte_young(*ptep) || address >= TASK_SIZE)