MIPS: hugetlbfs: Fix hazard between tlb write and pagemask restoration.

On some CPU the write to pagemask might complete before the TLB write
instruction reads from the pagemask register.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/arch/mips/mm/tlb-r4k.c b/arch/mips/mm/tlb-r4k.c
index 87b9cfcc30ff9ee44a982ae40982073e3eb5b855..4b9b935a070e0c4d0160f2c259c3dc553c40b35e 100644 (file)
--- a/arch/mips/mm/tlb-r4k.c
+++ b/arch/mips/mm/tlb-r4k.c
@@ -320,6 +320,7 @@ void __update_tlb(struct vm_area_struct * vma, unsigned long address, pte_t pte)
                        tlb_write_random();
                else
                        tlb_write_indexed();
+               tlbw_use_hazard();
                write_c0_pagemask(PM_DEFAULT_MASK);
        } else
 #endif