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    SubjectRe: asm/unistd.h

    Steve Grubb writes:
    > It would seem to me that after hearing how the macros are used in practice,
    > wouldn't turning them into inline functions be an improvement? This is
    > something gcc supports, it accomplishes the same thing, and has the added
    > advantage of type checking.
    > http://gcc.gnu.org/onlinedocs/gcc-2.95.3/gcc_4.html#SEC92

    Two reasons:

    1) Sometimes I don't want any type checking because it would create
    the necessity of adding a new include to a file --> a circular
    dependency to resolve. Macros hide the types except in the
    cases where they are actually invoked :-)

    2) Historically GCC was very bad with code generation with inline
    functions, so at that time the GCC manual statement "inline
    functions are just like a macro" was technically false :-)

    Yes, I know this is much different in today's gcc tree, but
    there hasn't been a gcc release in over 2 years so...

    Later,
    David S. Miller
    davem@redhat.com
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