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, 1 insertions, 1 deletions

diff --git a/sys/fs/devfs/devfs_devs.c b/sys/fs/devfs/devfs_devs.c
index 224ca07..9f19fca 100644
--- a/sys/fs/devfs/devfs_devs.c
+++ b/sys/fs/devfs/devfs_devs.c
@@ -339,7 +339,7 @@ devfs_populate(struct devfs_mount *dm)
 				de->de_gid = 0;
 				de->de_mode = 0666;
 				de->de_dirent->d_type = DT_LNK;
-				pdev = dev->si_drv1;
+				pdev = dev->si_parent;
 				j = strlen(pdev->si_name) + 1;
 				MALLOC(de->de_symlink, char *, j, M_DEVFS, M_WAITOK);
 				bcopy(pdev->si_name, de->de_symlink, j);