Extract eventfilter declarations to sys/_eventfilter.h

This allows replacing "sys/eventfilter.h" includes with "sys/_eventfilter.h"
in other header files (e.g., sys/{bus,conf,cpu}.h) and reduces header
pollution substantially.

EVENTHANDLER_DECLARE and EVENTHANDLER_LIST_DECLAREs were moved out of .c
files into appropriate headers (e.g., sys/proc.h, powernv/opal.h).

As a side effect of reduced header pollution, many .c files and headers no
longer contain needed definitions.  The remainder of the patch addresses
adding appropriate includes to fix those files.

LOCK_DEBUG and LOCK_FILE_LINE_ARG are moved to sys/_lock.h, as required by
sys/mutex.h since r326106 (but silently protected by header pollution prior
to this change).

No functional change (intended).  Of course, any out of tree modules that
relied on header pollution for sys/eventhandler.h, sys/lock.h, or
sys/mutex.h inclusion need to be fixed.  __FreeBSD_version has been bumped.

1 files changed, 2 insertions, 1 deletions

diff --git a/sys/sys/interrupt.h b/sys/sys/interrupt.h
index 66f421eb0265..cf8b7a011de8 100644
--- a/sys/sys/interrupt.h
+++ b/sys/sys/interrupt.h
@@ -176,8 +176,9 @@ int	intr_event_add_handler(struct intr_event *ie, const char *name,
 int	intr_event_bind(struct intr_event *ie, int cpu);
 int	intr_event_bind_irqonly(struct intr_event *ie, int cpu);
 int	intr_event_bind_ithread(struct intr_event *ie, int cpu);
+struct _cpuset;
 int	intr_event_bind_ithread_cpuset(struct intr_event *ie,
-	    cpuset_t *mask);
+	    struct _cpuset *mask);
 int	intr_event_create(struct intr_event **event, void *source,
 	    int flags, int irq, void (*pre_ithread)(void *),
 	    void (*post_ithread)(void *), void (*post_filter)(void *),