Ryan Roberts <ryan.roberts@xxxxxxx> writes:
[...]
> diff --git a/mm/mmu_gather.c b/mm/mmu_gather.c
> index 4f559f4ddd21..39725756e6bf 100644
> --- a/mm/mmu_gather.c
> +++ b/mm/mmu_gather.c
> @@ -47,6 +47,21 @@ static bool tlb_next_batch(struct mmu_gather *tlb)
> return true;
> }
>
> +unsigned int tlb_reserve_space(struct mmu_gather *tlb, unsigned int nr)
> +{
> + struct mmu_gather_batch *batch = tlb->active;
> + unsigned int nr_alloc = batch->max - batch->nr;
> +
> + while (nr_alloc < nr) {
> + if (!tlb_next_batch(tlb))
> + break;
> + nr_alloc += tlb->active->max;
> + }
> +
> + tlb->active = batch;
> + return nr_alloc;
> +}
Agree this addresses my previous comment nicely, so you can add:
Reviewed-by: Alistair Popple <apopple@xxxxxxxxxx>
> +
> #ifdef CONFIG_SMP
> static void tlb_flush_rmap_batch(struct mmu_gather_batch *batch, struct vm_area_struct *vma)
> {
