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SubjectRe: do_mmap

> > what about the do_mmap/do_mmap_pgoff implementation?
> > reurn-type: _unsigned_ long (which should be ok cause we've to return
> > an adress if len == 0)
> > on error: -ERR_*
> >
> > and the checks in various places are really strange. - well some
> > places check for:
> > o != NULL
> > o > -1024UL
> > o ...
> >
> > guess this nedds some cleanup.
> While you are at it... fs/binfmt_elf does mmaps but does not check for errors.
> And errors actually do happen there :-(

sure, was tripping over that anyways ... since the compiler spits out tons
of "conversion without a cast" warnings (seems to be a different way to
use grep :)

i just came across one problem: when converting the unsigned longs to
void * pointers, everything works fine, beside the "advanced"
pointer arithmetic. (like aligning the address to a certain
boundary - using address & MASK) ... for that case i need to
cast to an unsigned long in any case :(
is there another way to do it without explicit casting?
should we introduce ptr_addr_t?
can we be sure that an unsigned long is capable to hold
and address (also in the future)
can we be sure about gcc void * pointer arithmetic (like
++ incremets the address by one)


in some way i do, and in some way i don't.

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