> Hi rminming,
quoted text
>
> try_module_get is designed to ensure that you don't call a function inside a
> module without a reference.  Like any reference function, it cannot handle
> the case where the argument is invalid (or invalidated partway through the
> call).
>
> In this case, the module pointer is usually inside a registered structure.
> The pointer will be valid until the structure is unregistered, which the
> calling code presumably prevents while it's doing a lookup.
>
> Hope that clarifies,
> Rusty.
>

Hi Rusty,

Thank you so much!
I think you mean that this situation can really happen, because this
is a reference function, but it is so seldom, and the common result of
this situation is a kernel oops, it's not very important. Am I right?

Sorry about later reply, thanks again.
Best wishes,

rmingming
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