diff options
| -rw-r--r-- | sys/kern/kern_conf.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/sys/kern/kern_conf.c b/sys/kern/kern_conf.c index d578077..4d8e74b 100644 --- a/sys/kern/kern_conf.c +++ b/sys/kern/kern_conf.c @@ -375,6 +375,15 @@ make_dev(struct cdevsw *devsw, int minor, uid_t uid, gid_t gid, int perms, const } dev = makedev(devsw->d_maj, minor); + if (dev->si_flags & SI_CHEAPCLONE && + dev->si_flags & SI_NAMED && + dev->si_devsw == devsw) { + /* + * This is allowed as it removes races and generally + * simplifies cloning devices. + */ + return (dev); + } if (dev->si_flags & SI_NAMED) { printf( "WARNING: Driver mistake: repeat make_dev(\"%s\")\n", dev->si_name); |
