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Make lwp_ctl_alloc() return 0 instead of EINVAL, when lwpctl user 

address already exists. This allow calling _lwp_ctl(2) more than once
on the same LWP.
This commit is contained in:
njoly 2010-04-09 11:47:17 +00:00
parent 0dd8304ff9
commit cb925a949e
1 changed files with 3 additions and 3 deletions
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6
sys/kern/kern_lwp.c
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@ -1,4 +1,4 @@
/* $NetBSD: kern_lwp.c,v 1.142 2010/04/06 13:50:22 christos Exp $ */
/* $NetBSD: kern_lwp.c,v 1.143 2010/04/09 11:47:17 njoly Exp $ */
/*-
* Copyright (c) 2001, 2006, 2007, 2008, 2009 The NetBSD Foundation, Inc.
@ -209,7 +209,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: kern_lwp.c,v 1.142 2010/04/06 13:50:22 christos Exp $");
__KERNEL_RCSID(0, "$NetBSD: kern_lwp.c,v 1.143 2010/04/09 11:47:17 njoly Exp $");
#include "opt_ddb.h"
#include "opt_lockdebug.h"
@ -1617,7 +1617,7 @@ lwp_ctl_alloc(vaddr_t *uaddr)
if (l->l_lcpage != NULL) {
lcp = l->l_lcpage;
*uaddr = lcp->lcp_uaddr + (vaddr_t)l->l_lwpctl - lcp->lcp_kaddr;
return (EINVAL);
return 0;
}
/* First time around, allocate header structure for the process. */