Create a general facility for making dev_t's depend on another

dev_t.  The dev_depends(dev_t, dev_t) function is for tying them
to each other.

When destroy_dev() is called on a dev_t, all dev_t's depending
on it will also be destroyed (depth first order).

Rewrite the make_dev_alias() to use this dependency facility.

kern/subr_disk.c:
Make the disk mini-layer use dependencies to make sure all
relevant dev_t's are removed when the disk disappears.

Make the disk mini-layer precreate some magic sub devices
which the disk/slice/label code expects to be there.

kern/subr_disklabel.c:
Remove some now unneeded variables.

kern/subr_diskmbr.c:
Remove some ancient, commented out code.

kern/subr_diskslice.c:
Minor cleanup.  Use name from dev_t instead of dsname()

1 files changed, 0 insertions, 17 deletions

diff --git a/sys/kern/subr_diskmbr.c b/sys/kern/subr_diskmbr.c
index 593d71b..92234d5 100644
--- a/sys/kern/subr_diskmbr.c
+++ b/sys/kern/subr_diskmbr.c
@@ -298,26 +298,9 @@ reread_mbr:
 	 */
 	secpercyl = (u_long)max_nsectors * max_ntracks;
 	if (secpercyl != 0) {
-#if 0
-		u_long	secperunit;
-#endif
-
 		lp->d_nsectors = max_nsectors;
 		lp->d_ntracks = max_ntracks;
 		lp->d_secpercyl = secpercyl;
-		/*
-		 * Temporarily, don't even consider adjusting the drive's
-		 * size, since the adjusted size may exceed the hardware's
-		 * addressing capabilities.  The adjustment helped mainly
-		 * for ancient MFM drives with > 1024 cylinders, but now
-		 * breaks at least IDE drives with 63*16*65536 sectors if
-		 * they are controlled by the wd driver in CHS mode.
-		 */
-#if 0
-		secperunit = secpercyl * max_ncyls;
-		if (lp->d_secperunit < secperunit)
-			lp->d_secperunit = secperunit;
-#endif
 		lp->d_ncylinders = lp->d_secperunit / secpercyl;
 	}