From: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Date: Fri, 29 Apr 2016 13:26:22 +0000 (+1000)
Subject: powerpc/radix: Update MMU cache
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=a3dece6d69b0ad21b64104dff508c67a1a1f14dd;p=linux-beck.git

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 ac79dbde1015..89677884ecc8 100644
--- 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)