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[v3,59/70] powerpc/radix: Update MMU cache

Message ID 1461936393-10131-59-git-send-email-mpe@ellerman.id.au (mailing list archive)
State Accepted
Headers show

Commit Message

Michael Ellerman April 29, 2016, 1:26 p.m. UTC 
From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>

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>
---
 arch/powerpc/mm/mem.c | 2 ++
 1 file changed, 2 insertions(+)
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Patch

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)