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    SubjectRe: [RFC PATCH] kbuild: implement several W= levels
    > Just started looking at the patch.
    > I tested it and -Wnested-externs is causing a *lot* of noise, because of
    > the nested extern ‘_NSIG_WORDS_is_unsupported_size’ in
    > include/linux/signal.h, which gets included a lot.
    > So, unless that changes, I think that it shouldn't be enabled for W=1.

    It is just the same issue that pops up for each file.
    It is easy to fix.

    The ones that does not belong in W=1 is those that are triggered
    by many different places in the kernel.

    If they are triggered in a few .h files they look noisy, but
    it is easy to fix.

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