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Lock vnode correctly for VOP_OPEN.

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Discussed with:	alc, dillon
This commit is contained in:
eivind 1999-04-10 17:54:43 +00:00
parent 3a8af328c5
commit 73c95aa73f
1 changed files with 5 additions and 1 deletions
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6
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 1.59 1999/01/21 10:17:12 dillon Exp $
* $Id: vm_swap.c,v 1.60 1999/02/25 05:37:18 dillon Exp $
*/
#include "opt_devfs.h"
@ -52,6 +52,7 @@
#include <sys/fcntl.h>
#include <sys/blist.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <vm/vm.h>
#include <vm/vm_extern.h>
#include <vm/swap_pager.h>
@ -278,6 +279,7 @@ swaponvp(p, vp, dev, nblks)
swblk_t dvbase;
int error;
ASSERT_VOP_UNLOCKED(vp, "swaponvp");
for (sp = swdevt, index = 0 ; index < nswdev; index++, sp++) {
if (sp->sw_vp == vp)
return EBUSY;
@ -287,7 +289,9 @@ swaponvp(p, vp, dev, nblks)
}
return EINVAL;
found:
(void) vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
error = VOP_OPEN(vp, FREAD | FWRITE, p->p_ucred, p);
(void) VOP_UNLOCK(vp, 0, p);
if (error)
return (error);