Re: [PATCH] print_worker_info: Handle pointer with more care

[Richard Weinberger <richard@nod.at>]

Am 16.08.2013 18:53, schrieb Richard Weinberger:
>> Yeah, and that should be fine.  &pwq->wq would be just an offset of wq
> 
> Yep. Now my brain also parsed the C notation correctly.
> Sorry for the completely wrong patch.
> 
>> from NULL which is an invalid pointer but probe_kernel_read() should
>> be able to handle that and probably just return 0 or -1 (all bits
>> set).  I *think* what's necessary is making probe_kernel_read() use
>> mincore() to fine out whether the requested address is mapped (it
>> should return -EFAULT if not) and try to dereference the address iff
>> it's mapped.
> 
> UML needs a custom probe_kernel_read()? Fine. :)

With my own probe_kernel_read() that uses mincore()
it works fine so far. :-)

Thanks,
//richard