On Tue, Mar 23, 2021 at 10:34:45AM +0800, Miaohe Lin wrote:
> Hi:
> On 2021/3/23 8:48, Peter Xu wrote:
> > pte_unmap_same() will always unmap the pte pointer. After the unmap,
> > vmf->pte
> > will not be valid any more. We should clear it.
> >
> > It was safe only because no one is accessing
Hi:
On 2021/3/23 8:48, Peter Xu wrote:
> pte_unmap_same() will always unmap the pte pointer. After the unmap, vmf->pte
> will not be valid any more. We should clear it.
>
> It was safe only because no one is accessing vmf->pte after pte_unmap_same()
> returns, since the only caller of
pte_unmap_same() will always unmap the pte pointer. After the unmap, vmf->pte
will not be valid any more. We should clear it.
It was safe only because no one is accessing vmf->pte after pte_unmap_same()
returns, since the only caller of pte_unmap_same() (so far) is do_swap_page(),
where
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