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The way we get a vnode for swapdev is not quite kosher. In particular

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it breaks in the DEVFS_ROOT case.  replicate a bit too much of bdevvp()
in here to circumvent the problem.  The real problem is the magic that
lives in bdevsw[1].
This commit is contained in:
Poul-Henning Kamp 1996-10-27 22:31:00 +00:00
parent 2b0039e0a4
commit 281cd9b020
1 changed files with 17 additions and 3 deletions
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20
sys/vm/vm_swap.c
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@ -31,7 +31,7 @@
* SUCH DAMAGE.
*
* @(#)vm_swap.c 8.5 (Berkeley) 2/17/94
* $Id: vm_swap.c,v 1.38 1996/03/28 15:40:17 bde Exp $
* $Id: vm_swap.c,v 1.39 1996/07/12 04:12:25 bde Exp $
*/
#include <sys/param.h>
@ -282,9 +282,23 @@ swaponvp(p, vp, dev, nblks)
vm_swap_size += blk;
}
if (!swapdev_vp && bdevvp(swapdev, &swapdev_vp))
panic("Cannot get vnode for swapdev");
if (!swapdev_vp) {
struct vnode *vp;
struct vnode *nvp;
error = getnewvnode(VT_NON, (struct mount *) 0,
spec_vnodeop_p, &nvp);
if (error)
panic("Cannot get vnode for swapdev");
vp = nvp;
vp->v_type = VBLK;
if ((nvp = checkalias(vp, swapdev,
(struct mount *) 0))) {
vput(vp);
vp = nvp;
}
swapdev_vp = vp;
}
return (0);
}