diff options
Diffstat (limited to 'arch/powerpc/mm/book3s64/radix_tlb.c')
| -rw-r--r-- | arch/powerpc/mm/book3s64/radix_tlb.c | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/arch/powerpc/mm/book3s64/radix_tlb.c b/arch/powerpc/mm/book3s64/radix_tlb.c index 1ef5d4e1a50a..d7f1a6bd08ef 100644 --- a/arch/powerpc/mm/book3s64/radix_tlb.c +++ b/arch/powerpc/mm/book3s64/radix_tlb.c @@ -639,7 +639,11 @@ static bool mm_needs_flush_escalation(struct mm_struct *mm) return false; } -static void exit_lazy_flush_tlb(struct mm_struct *mm) +/* + * If always_flush is true, then flush even if this CPU can't be removed + * from mm_cpumask. + */ +void exit_lazy_flush_tlb(struct mm_struct *mm, bool always_flush) { unsigned long pid = mm->context.id; int cpu = smp_processor_id(); @@ -652,7 +656,7 @@ static void exit_lazy_flush_tlb(struct mm_struct *mm) * done with interrupts off. */ if (current->mm == mm) - goto out_flush; + goto out; if (current->active_mm == mm) { WARN_ON_ONCE(current->mm != NULL); @@ -674,17 +678,19 @@ static void exit_lazy_flush_tlb(struct mm_struct *mm) if (cpumask_test_cpu(cpu, mm_cpumask(mm))) { atomic_dec(&mm->context.active_cpus); cpumask_clear_cpu(cpu, mm_cpumask(mm)); + always_flush = true; } -out_flush: - _tlbiel_pid(pid, RIC_FLUSH_ALL); +out: + if (always_flush) + _tlbiel_pid(pid, RIC_FLUSH_ALL); } #ifdef CONFIG_SMP static void do_exit_flush_lazy_tlb(void *arg) { struct mm_struct *mm = arg; - exit_lazy_flush_tlb(mm); + exit_lazy_flush_tlb(mm, true); } static void exit_flush_lazy_tlbs(struct mm_struct *mm) @@ -746,7 +752,7 @@ static enum tlb_flush_type flush_type_needed(struct mm_struct *mm, bool fullmm) * to trim. */ if (tick_and_test_trim_clock()) { - exit_lazy_flush_tlb(mm); + exit_lazy_flush_tlb(mm, true); return FLUSH_TYPE_NONE; } } @@ -792,7 +798,7 @@ static enum tlb_flush_type flush_type_needed(struct mm_struct *mm, bool fullmm) if (current->mm == mm) return FLUSH_TYPE_LOCAL; if (cpumask_test_cpu(cpu, mm_cpumask(mm))) - exit_lazy_flush_tlb(mm); + exit_lazy_flush_tlb(mm, true); return FLUSH_TYPE_NONE; } |