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    SubjectRe: [PATCH] posix_types.h: make __NFDBITS match glibc definition
    On Tue, Jul 24, 2012 at 12:37:36PM -0700, Linus Torvalds wrote:
    > On Tue, Jul 24, 2012 at 12:19 PM, Jeff Law <> wrote:
    > >
    > > All that's strictly necessary is that cast to (int). That avoids the
    > > problem.
    > .. and it causes other problems instead, namely the crap code generation for __.
    > Apparently glibc fixed it totally differently, and the kernel actually
    > doesn't care at all. We'd probably be best off just removing those
    > #defines entirely. Especially since the kernel doesn't even *use*
    > those things.
    > The kernel _does_ have these odd #define's in <linux/time.h>:
    > #define NFDBITS __NFDBITS
    > #define FD_SETSIZE __FD_SETSIZE
    > #define FD_SET(fd,fdsetp) __FD_SET(fd,fdsetp)
    > #define FD_CLR(fd,fdsetp) __FD_CLR(fd,fdsetp)
    > #define FD_ISSET(fd,fdsetp) __FD_ISSET(fd,fdsetp)
    > #define FD_ZERO(fdsetp) __FD_ZERO(fdsetp)
    > but apart from __NFDBITS and __FD_SETSIZE, the kernel doesn't even
    > seem to define those __FD_xyx macros at all (although possibly they
    > are hiding in some odd auto-generated headers, I didn't check). I
    > think this is all silly left-overs that nobody really wants any more.
    > glibc clearly doesn't.

    I'd be happy to come up with a patch that drops them, but since they're
    in a user visible header file I was concerned somebody might be using
    them explicitly from posix_types.h. People do weird crap like not use
    glibc all the time.


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