diff options
Diffstat (limited to 'arch/powerpc/mm/mmu_context.c')
| -rw-r--r-- | arch/powerpc/mm/mmu_context.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/powerpc/mm/mmu_context.c b/arch/powerpc/mm/mmu_context.c index 0ab297c4cfad..f84e14f23e50 100644 --- a/arch/powerpc/mm/mmu_context.c +++ b/arch/powerpc/mm/mmu_context.c @@ -57,8 +57,10 @@ void switch_mm_irqs_off(struct mm_struct *prev, struct mm_struct *next, * in switch_slb(), and/or the store of paca->mm_ctx_id in * copy_mm_to_paca(). * - * On the read side the barrier is in pte_xchg(), which orders - * the store to the PTE vs the load of mm_cpumask. + * On the other side, the barrier is in mm/tlb-radix.c for + * radix which orders earlier stores to clear the PTEs vs + * the load of mm_cpumask. And pte_xchg which does the same + * thing for hash. * * This full barrier is needed by membarrier when switching * between processes after store to rq->curr, before user-space |