Re: [PATCH v2 1/4] mm: Add optional close() to struct vm_special_mapping

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Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> writes:

> On Mon, 2 Sept 2024 at 13:49, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> wrote:
>>
>> uprobe_clear_state() is a pretty simple low-level thing.  Side-effects
>> seem unlikely?
>
> I think uprobe_clear_state() should be removed from fork.c entirely,
> made 'static', and then we'd have
>
>         area->xol_mapping.close = uprobe_clear_state;
>
> in __create_xol_area() instead (ok, the arguments change, instead of
> looking up "mm->uprobes_state.xol_area", it would get it as the vma
> argument)
>
> That's how it should always have been, except we didn't have a close() function.
>
> Hmm?

Indeed, that's much better. I'll prepare a patch.

Thanks!




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