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Warner Losh authored
config_intrhook doesn't need to be a two-pointer TAILQ. We rarely add/delete from this and so those need not be optimized. Instaed, use the one-pointer STAILQ plus a uintptr_t to be used as a flags word. This will allow these changes to be MFC'd to 12 and 13 to fix a race in removable devices. Feedback from: jhb Reviewed by: mav Differential Revision: https://reviews.freebsd.org/D29004
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