sysdeps/i386/i486/bits/string.h: describing memory access question

[Denis Zaitsev]

So, just everyhere we have (for now) something like

  "m" ( *(struct { char __x[0xfffffff]; } *)__str)

in the input parameters list.  The question is: why 0xfffffff is used?
Would 0x7fffffff be better?  As it describes all the usable memory,
not just 1/8 part of it.

And would it be better to use some macros for this, like:

  "m" (*(ALL_MEM*)__str)

along with, say:

  "m" (*(PART_MEM(__len)*)__mem)

for __mem[__len] parameters.  It seems to be more readable and more
convinient and more etc.  I would like to implement this, if the idea
in general is sane.