148 /* should held proc->asts_spin lock */
201 	struct dlm_user_proc *proc;  in dlm_user_add_ast()  local
223 	proc = ua->proc;  in dlm_user_add_ast()
231 	spin_lock(&proc->asts_spin);  in dlm_user_add_ast()
236 		spin_unlock(&proc->asts_spin);  in dlm_user_add_ast()
241 		list_add_tail(&lkb->lkb_cb_list, &proc->asts);  in dlm_user_add_ast()
242 		wake_up_interruptible(&proc->wait);  in dlm_user_add_ast()
250 	spin_unlock(&proc->asts_spin);  in dlm_user_add_ast()
254 		spin_lock(&proc->locks_spin);  in dlm_user_add_ast()
259 		spin_unlock(&proc->locks_spin);  in dlm_user_add_ast()
265 static int device_user_lock(struct dlm_user_proc *proc,  in device_user_lock()  argument
273 	ls = dlm_find_lockspace_local(proc->lockspace);  in device_user_lock()
285 	ua->proc = proc;  in device_user_lock()
316 static int device_user_unlock(struct dlm_user_proc *proc,  in device_user_unlock()  argument
323 	ls = dlm_find_lockspace_local(proc->lockspace);  in device_user_unlock()
330 	ua->proc = proc;  in device_user_unlock()
345 static int device_user_deadlock(struct dlm_user_proc *proc,  in device_user_deadlock()  argument
351 	ls = dlm_find_lockspace_local(proc->lockspace);  in device_user_deadlock()
406 static int device_user_purge(struct dlm_user_proc *proc,  in device_user_purge()  argument
412 	ls = dlm_find_lockspace_local(proc->lockspace);  in device_user_purge()
416 	error = dlm_user_purge(ls, proc, params->nodeid, params->pid);  in device_user_purge()
530 	struct dlm_user_proc *proc = file->private_data;  in device_write()  local
575 		if (proc)  in device_write()
576 			set_bit(DLM_PROC_FLAGS_COMPAT, &proc->flags);  in device_write()
585 	    (proc && test_bit(DLM_PROC_FLAGS_CLOSING, &proc->flags))) {  in device_write()
595 		if (!proc) {  in device_write()
599 		error = device_user_lock(proc, &kbuf->i.lock);  in device_write()
603 		if (!proc) {  in device_write()
607 		error = device_user_unlock(proc, &kbuf->i.lock);  in device_write()
611 		if (!proc) {  in device_write()
615 		error = device_user_deadlock(proc, &kbuf->i.lock);  in device_write()
619 		if (proc) {  in device_write()
627 		if (proc) {  in device_write()
635 		if (!proc) {  in device_write()
639 		error = device_user_purge(proc, &kbuf->i.purge);  in device_write()
652 /* Every process that opens the lockspace device has its own "proc" structure
658 	struct dlm_user_proc *proc;  in device_open()  local
665 	proc = kzalloc(sizeof(struct dlm_user_proc), GFP_NOFS);  in device_open()
666 	if (!proc) {  in device_open()
671 	proc->lockspace = ls->ls_local_handle;  in device_open()
672 	INIT_LIST_HEAD(&proc->asts);  in device_open()
673 	INIT_LIST_HEAD(&proc->locks);  in device_open()
674 	INIT_LIST_HEAD(&proc->unlocking);  in device_open()
675 	spin_lock_init(&proc->asts_spin);  in device_open()
676 	spin_lock_init(&proc->locks_spin);  in device_open()
677 	init_waitqueue_head(&proc->wait);  in device_open()
678 	file->private_data = proc;  in device_open()
685 	struct dlm_user_proc *proc = file->private_data;  in device_close()  local
688 	ls = dlm_find_lockspace_local(proc->lockspace);  in device_close()
692 	set_bit(DLM_PROC_FLAGS_CLOSING, &proc->flags);  in device_close()
694 	dlm_clear_proc_locks(ls, proc);  in device_close()
698 	   looking for lkb->ua->proc */  in device_close()
700 	kfree(proc);  in device_close()
805 	struct dlm_user_proc *proc = file->private_data;  in device_read()  local
817 	if (!proc) {  in device_read()
832 	if (test_bit(DLM_PROC_FLAGS_CLOSING, &proc->flags))  in device_read()
835 	spin_lock(&proc->asts_spin);  in device_read()
836 	if (list_empty(&proc->asts)) {  in device_read()
838 			spin_unlock(&proc->asts_spin);  in device_read()
842 		add_wait_queue(&proc->wait, &wait);  in device_read()
846 		if (list_empty(&proc->asts) && !signal_pending(current)) {  in device_read()
847 			spin_unlock(&proc->asts_spin);  in device_read()
849 			spin_lock(&proc->asts_spin);  in device_read()
853 		remove_wait_queue(&proc->wait, &wait);  in device_read()
856 			spin_unlock(&proc->asts_spin);  in device_read()
865 	lkb = list_first_entry(&proc->asts, struct dlm_lkb, lkb_cb_list);  in device_read()
878 		spin_unlock(&proc->asts_spin);  in device_read()
879 		/* removes ref for proc->asts, may cause lkb to be freed */  in device_read()
893 	spin_unlock(&proc->asts_spin);  in device_read()
910 				 test_bit(DLM_PROC_FLAGS_COMPAT, &proc->flags),  in device_read()
915 	/* removes ref for proc->asts, may cause lkb to be freed */  in device_read()
924 	struct dlm_user_proc *proc = file->private_data;  in device_poll()  local
926 	poll_wait(file, &proc->wait, wait);  in device_poll()
928 	spin_lock(&proc->asts_spin);  in device_poll()
929 	if (!list_empty(&proc->asts)) {  in device_poll()
930 		spin_unlock(&proc->asts_spin);  in device_poll()
933 	spin_unlock(&proc->asts_spin);  in device_poll()