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Fix a race condition that did, after all, exist.

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Reviewed by:	phk
Submitted by:	dfr
This commit is contained in:
Poul-Henning Kamp 1997-05-06 15:19:38 +00:00
parent 77e25db56d
commit 8670684a2f
2 changed files with 10 additions and 6 deletions
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8
sys/kern/vfs_export.c
View File

@ -36,7 +36,7 @@
* SUCH DAMAGE.
*
* @(#)vfs_subr.c 8.31 (Berkeley) 5/26/95
* $Id: vfs_subr.c,v 1.84 1997/04/30 03:09:15 dyson Exp $
* $Id: vfs_subr.c,v 1.85 1997/05/04 09:17:29 phk Exp $
*/
/*
@ -2149,8 +2149,10 @@ vtouch(vp)
return;
}
if (simple_lock_try(&vnode_free_list_slock)) {
TAILQ_REMOVE(&vnode_free_list, vp, v_freelist);
TAILQ_INSERT_TAIL(&vnode_free_list, vp, v_freelist);
if (vp->v_freelist.tqe_prev != (struct vnode **)0xdeadb) {
TAILQ_REMOVE(&vnode_free_list, vp, v_freelist);
TAILQ_INSERT_TAIL(&vnode_free_list, vp, v_freelist);
}
simple_unlock(&vnode_free_list_slock);
}
simple_unlock(&vp->v_interlock);

8
sys/kern/vfs_subr.c
View File

@ -36,7 +36,7 @@
* SUCH DAMAGE.
*
* @(#)vfs_subr.c 8.31 (Berkeley) 5/26/95
* $Id: vfs_subr.c,v 1.84 1997/04/30 03:09:15 dyson Exp $
* $Id: vfs_subr.c,v 1.85 1997/05/04 09:17:29 phk Exp $
*/
/*
@ -2149,8 +2149,10 @@ vtouch(vp)
return;
}
if (simple_lock_try(&vnode_free_list_slock)) {
TAILQ_REMOVE(&vnode_free_list, vp, v_freelist);
TAILQ_INSERT_TAIL(&vnode_free_list, vp, v_freelist);
if (vp->v_freelist.tqe_prev != (struct vnode **)0xdeadb) {
TAILQ_REMOVE(&vnode_free_list, vp, v_freelist);
TAILQ_INSERT_TAIL(&vnode_free_list, vp, v_freelist);
}
simple_unlock(&vnode_free_list_slock);
}
simple_unlock(&vp->v_interlock);