[src/trunk]: src/sys/kern fix locking.

[yamt <yamt%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/92d8f079c5c0
branches:  trunk
changeset: 546604:92d8f079c5c0
user:      yamt <yamt%NetBSD.org@localhost>
date:      Fri May 02 12:43:01 2003 +0000

description:
fix locking.

diffstat:

 sys/kern/kern_ktrace.c |  19 +++++++++++++------
 1 files changed, 13 insertions(+), 6 deletions(-)

diffs (45 lines):

diff -r 74658935c430 -r 92d8f079c5c0 sys/kern/kern_ktrace.c
--- a/sys/kern/kern_ktrace.c    Fri May 02 12:27:49 2003 +0000
+++ b/sys/kern/kern_ktrace.c    Fri May 02 12:43:01 2003 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: kern_ktrace.c,v 1.69 2003/04/03 18:54:16 christos Exp $        */
+/*     $NetBSD: kern_ktrace.c,v 1.70 2003/05/02 12:43:01 yamt Exp $    */
 
 /*
  * Copyright (c) 1989, 1993
@@ -36,7 +36,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: kern_ktrace.c,v 1.69 2003/04/03 18:54:16 christos Exp $");
+__KERNEL_RCSID(0, "$NetBSD: kern_ktrace.c,v 1.70 2003/05/02 12:43:01 yamt Exp $");
 
 #include "opt_ktrace.h"
 #include "opt_compat_mach.h"
@@ -498,15 +498,22 @@
        struct proc *curp = l->l_proc;
        struct file *fp = NULL;
        struct filedesc *fdp = curp->p_fd;
+       int error;
 
        if ((fp = fd_getfile(fdp, SCARG(uap, fd))) == NULL)
                return (EBADF);
 
-       if ((fp->f_flag & FWRITE) == 0)
-               return (EBADF);
+       FILE_USE(fp);
 
-       return ktrace_common(curp, SCARG(uap, ops),
-           SCARG(uap, facs), SCARG(uap, pid), fp);
+       if ((fp->f_flag & FWRITE) == 0)
+               error = EBADF;
+       else
+               error = ktrace_common(curp, SCARG(uap, ops),
+                   SCARG(uap, facs), SCARG(uap, pid), fp);
+
+       FILE_UNUSE(fp, curp);
+
+       return error;
 }
 
 /*