Rework the sysconf(3) interaction with aio:

sysconf.c:
  Use 'break' rather than 'goto yesno' in sysconf.c so that we report a '0'
  return value from the kernel sysctl.

vfs_aio.c:
  Make aio reset its configuration parameters to -1 after unloading
  instead of 0.

posix4_mib.c:
  Initialize the aio configuration parameters to -1
  to indicate that it is not loaded.
  Add a facility (p31b_iscfg()) to determine if a posix4 facility has been
  initialized to avoid having to re-order the SYSINITs.
  Use p31b_iscfg() to determine if aio has had a chance to run yet which
  is likely if it is compiled into the kernel and avoid spamming its
  values.
  Introduce a macro P31B_VALID() instead of doing the same comparison over
  and over.

posix4.h:
  Prototype p31b_iscfg().

1 files changed, 3 insertions, 3 deletions

diff --git a/sys/kern/vfs_aio.c b/sys/kern/vfs_aio.c
index 5254a16..9fde837 100644
--- a/sys/kern/vfs_aio.c
+++ b/sys/kern/vfs_aio.c
@@ -376,9 +376,9 @@ aio_unload(void)
 	rm_at_exit(aio_proc_rundown);
 	rm_at_exec(aio_proc_rundown);
 	kqueue_del_filteropts(EVFILT_AIO);
-	p31b_setcfg(CTL_P1003_1B_AIO_LISTIO_MAX, 0);
-	p31b_setcfg(CTL_P1003_1B_AIO_MAX, 0);
-	p31b_setcfg(CTL_P1003_1B_AIO_PRIO_DELTA_MAX, 0);
+	p31b_setcfg(CTL_P1003_1B_AIO_LISTIO_MAX, -1);
+	p31b_setcfg(CTL_P1003_1B_AIO_MAX, -1);
+	p31b_setcfg(CTL_P1003_1B_AIO_PRIO_DELTA_MAX, -1);
 	return (0);
 }