Re: [Xenomai-help] rtdm_mmap_to_user without MMU

[Jan Kiszka <jan.kiszka@domain.hid>]

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Kolja Waschk wrote:
>> they will become two in the end), see below. Please check if it works
>> for you.
> 
> Aah, I was checking too hastily and missed a compile error. Sorry!
> Actually, there's a typo in the get_unmapped_area (filp <-> file), and
> it does _not_ work this way, unless the address to map is specified as
> the offset when calling do_mmap:
> 
>     user_ptr = (void *)do_mmap(filp, (unsigned long)*pptr, len, prot,
>                        MAP_SHARED, mmap_data->src_vaddr);
> 
> Otherwise pptr will simply remain zero.

Hmm, thought I got all paths. Such side effects indicate that this way
is not a stable one. Ok, will try to find a better solution, but may
take some time.

Jan


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