diff options
Diffstat (limited to 'sys/kern')
| -rw-r--r-- | sys/kern/kern_conf.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/sys/kern/kern_conf.c b/sys/kern/kern_conf.c index d331d53..5520da8 100644 --- a/sys/kern/kern_conf.c +++ b/sys/kern/kern_conf.c @@ -125,6 +125,24 @@ dev_refthread(struct cdev *dev) return (csw); } +struct cdevsw * +devvn_refthread(struct vnode *vp, struct cdev **devp) +{ + struct cdevsw *csw; + + mtx_assert(&devmtx, MA_NOTOWNED); + csw = NULL; + dev_lock(); + *devp = vp->v_rdev; + if (*devp != NULL) { + csw = (*devp)->si_devsw; + if (csw != NULL) + (*devp)->si_threadcount++; + } + dev_unlock(); + return (csw); +} + void dev_relthread(struct cdev *dev) { |
