kib 0ae42a4095 Since rev. 1.199 of sys/kern/kern_conf.c, the thread that calls ... destroy_dev() from d_close() cdev method would self-deadlock. devfs_close() bump device thread reference counter, and destroy_dev() sleeps, waiting for si_threadcount to reach zero for cdev without d_purge method. destroy_dev_sched() could be used instead from d_close(), to schedule execution of destroy_dev() in another context. The destroy_dev_sched_drain() function can be used to drain the scheduled calls to destroy_dev_sched(). Similarly, drain_dev_clone_events() drains the events clone to make sure no lingering devices are left after dev_clone event handler deregistered. make_dev_credf(MAKEDEV_REF) function should be used from dev_clone event handlers instead of make_dev()/make_dev_cred() to ensure that created device has reference counter bumped before cdev mutex is dropped inside make_dev(). Reviewed by: tegge (early versions), njl (programming interface) Debugging help and testing by: Peter Holm Approved by: re (kensmith)		2007-07-03 17:42:37 +00:00
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devfs_devs.c	Rename mac*devfsdirent*() to mac*devfs*() to synchronize with SEDarwin,	2007-04-23 13:36:54 +00:00
devfs_int.h	Since rev. 1.199 of sys/kern/kern_conf.c, the thread that calls	2007-07-03 17:42:37 +00:00
devfs_rule.c	Sweep kernel replacing suser(9) calls with priv(9) calls, assigning	2006-11-06 13:42:10 +00:00
devfs_vfsops.c	Use mount interlock to protect all changes to mnt_flag and mnt_kern_flag.	2006-09-26 04:12:49 +00:00
devfs_vnops.c	Since rev. 1.199 of sys/kern/kern_conf.c, the thread that calls	2007-07-03 17:42:37 +00:00
devfs.h	Properly lock the vnode around vgone() calls.	2006-10-18 11:17:14 +00:00