On Tue, Apr 04, 2023 at 04:42:23PM +0300, Yair Podemsky wrote:
> diff --git a/mm/mmu_gather.c b/mm/mmu_gather.c
> index 2b93cf6ac9ae..5ea9be6fb87c 100644
> --- a/mm/mmu_gather.c
> +++ b/mm/mmu_gather.c
> @@ -191,7 +191,13 @@ static void tlb_remove_table_smp_sync(void *arg)
> /* Simply deliver the interrupt */
> }
>
> -void tlb_remove_table_sync_one(void)
> +#ifdef CONFIG_ARCH_HAS_CPUMASK_BITS
> +#define REMOVE_TABLE_IPI_MASK mm_cpumask(mm)
> +#else
> +#define REMOVE_TABLE_IPI_MASK NULL
> +#endif /* CONFIG_ARCH_HAS_CPUMASK_BITS */
> +
> +void tlb_remove_table_sync_one(struct mm_struct *mm)
> {
> /*
> * This isn't an RCU grace period and hence the page-tables cannot be
> @@ -200,7 +206,8 @@ void tlb_remove_table_sync_one(void)
> * It is however sufficient for software page-table walkers that rely on
> * IRQ disabling.
> */
> - smp_call_function(tlb_remove_table_smp_sync, NULL, 1);
> + on_each_cpu_mask(REMOVE_TABLE_IPI_MASK, tlb_remove_table_smp_sync,
> + NULL, true);
> }
Uhh, I don't think NULL is a valid @mask argument. Should that not be
something like:
#ifdef CONFIG_ARCH_HAS_CPUMASK
#define REMOVE_TABLE_IPI_MASK mm_cpumask(mm)
#else
#define REMOVE_TABLE_IPI_MASK cpu_online_mask
#endif
preempt_disable();
on_each_cpu_mask(REMOVE_TABLE_IPI_MASK, tlb_remove_table_smp_sync, NULL true);
preempt_enable();
?
