Remove all spin_is_locked calls

On systems with CONFIG_SMP turned off, spin_is_locked always returns
false causing these assertions to fail. Remove them as suggested in
zfsonlinux/zfs#6558.

Reviewed-by: George Melikov <mail@gmelikov.ru>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: James Cowgill <james.cowgill@mips.com>
Closes #665

module/spl/spl-kmem-cache.c

@@ -382,7 +382,6 @@ spl_slab_free(spl_kmem_slab_t *sks,
 
 	skc = sks->sks_cache;
 	ASSERT(skc->skc_magic == SKC_MAGIC);
-	ASSERT(spin_is_locked(&skc->skc_lock));
 
 	/*
 	 * Update slab/objects counters in the cache, then remove the
@@ -583,7 +582,6 @@ __spl_cache_flush(spl_kmem_cache_t *skc, spl_kmem_magazine_t *skm, int flush)
 
 	ASSERT(skc->skc_magic == SKC_MAGIC);
 	ASSERT(skm->skm_magic == SKM_MAGIC);
-	ASSERT(spin_is_locked(&skc->skc_lock));
 
 	for (i = 0; i < count; i++)
 		spl_cache_shrink(skc, skm->skm_objs[i]);
@@ -1125,7 +1123,6 @@ spl_cache_obj(spl_kmem_cache_t *skc, spl_kmem_slab_t *sks)
 
 	ASSERT(skc->skc_magic == SKC_MAGIC);
 	ASSERT(sks->sks_magic == SKS_MAGIC);
-	ASSERT(spin_is_locked(&skc->skc_lock));
 
 	sko = list_entry(sks->sks_free_list.next, spl_kmem_obj_t, sko_list);
 	ASSERT(sko->sko_magic == SKO_MAGIC);
@@ -1396,7 +1393,6 @@ spl_cache_shrink(spl_kmem_cache_t *skc, void *obj)
 	spl_kmem_obj_t *sko = NULL;
 
 	ASSERT(skc->skc_magic == SKC_MAGIC);
-	ASSERT(spin_is_locked(&skc->skc_lock));
 
 	sko = spl_sko_from_obj(skc, obj);
 	ASSERT(sko->sko_magic == SKO_MAGIC);

module/spl/spl-taskq.c

@@ -103,7 +103,6 @@ task_alloc(taskq_t *tq, uint_t flags, unsigned long *irqflags)
 	int count = 0;
 
 	ASSERT(tq);
-	ASSERT(spin_is_locked(&tq->tq_lock));
 retry:
 	/* Acquire taskq_ent_t's from free list if available */
 	if (!list_empty(&tq->tq_free_list) && !(flags & TQ_NEW)) {
@@ -168,7 +167,6 @@ task_free(taskq_t *tq, taskq_ent_t *t)
 {
 	ASSERT(tq);
 	ASSERT(t);
-	ASSERT(spin_is_locked(&tq->tq_lock));
 	ASSERT(list_empty(&t->tqent_list));
 	ASSERT(!timer_pending(&t->tqent_timer));
 
@@ -185,7 +183,6 @@ task_done(taskq_t *tq, taskq_ent_t *t)
 {
 	ASSERT(tq);
 	ASSERT(t);
-	ASSERT(spin_is_locked(&tq->tq_lock));
 
 	/* Wake tasks blocked in taskq_wait_id() */
 	wake_up_all(&t->tqent_waitq);
@@ -259,7 +256,6 @@ taskq_lowest_id(taskq_t *tq)
 	taskq_thread_t *tqt;
 
 	ASSERT(tq);
-	ASSERT(spin_is_locked(&tq->tq_lock));
 
 	if (!list_empty(&tq->tq_pend_list)) {
 		t = list_entry(tq->tq_pend_list.next, taskq_ent_t, tqent_list);
@@ -297,7 +293,6 @@ taskq_insert_in_order(taskq_t *tq, taskq_thread_t *tqt)
 
 	ASSERT(tq);
 	ASSERT(tqt);
-	ASSERT(spin_is_locked(&tq->tq_lock));
 
 	list_for_each_prev(l, &tq->tq_active_list) {
 		w = list_entry(l, taskq_thread_t, tqt_active_list);
@@ -320,8 +315,6 @@ taskq_find_list(taskq_t *tq, struct list_head *lh, taskqid_t id)
 	struct list_head *l;
 	taskq_ent_t *t;
 
-	ASSERT(spin_is_locked(&tq->tq_lock));
-
 	list_for_each(l, lh) {
 		t = list_entry(l, taskq_ent_t, tqent_list);
 
@@ -348,8 +341,6 @@ taskq_find(taskq_t *tq, taskqid_t id)
 	struct list_head *l;
 	taskq_ent_t *t;
 
-	ASSERT(spin_is_locked(&tq->tq_lock));
-
 	t = taskq_find_list(tq, &tq->tq_delay_list, id);
 	if (t)
 		return (t);
@@ -751,8 +742,6 @@ taskq_next_ent(taskq_t *tq)
 {
 	struct list_head *list;
 
-	ASSERT(spin_is_locked(&tq->tq_lock));
-
 	if (!list_empty(&tq->tq_prio_list))
 		list = &tq->tq_prio_list;
 	else if (!list_empty(&tq->tq_pend_list))
@@ -817,8 +806,6 @@ taskq_thread_spawn(taskq_t *tq)
 static int
 taskq_thread_should_stop(taskq_t *tq, taskq_thread_t *tqt)
 {
-	ASSERT(spin_is_locked(&tq->tq_lock));
-
 	if (!(tq->tq_flags & TASKQ_DYNAMIC))
 		return (0);
 

module/spl/spl-tsd.c

@@ -315,7 +315,6 @@ tsd_hash_add_pid(tsd_hash_table_t *table, pid_t pid)
 static void
 tsd_hash_del(tsd_hash_table_t *table, tsd_hash_entry_t *entry)
 {
-	ASSERT(spin_is_locked(&table->ht_lock));
 	hlist_del(&entry->he_list);
 	list_del_init(&entry->he_key_list);
 	list_del_init(&entry->he_pid_list);

module/spl/spl-vnode.c

@@ -427,8 +427,6 @@ file_find(int fd, struct task_struct *task)
 {
         file_t *fp;
 
-	ASSERT(spin_is_locked(&vn_file_lock));
-
         list_for_each_entry(fp, &vn_file_list,  f_list) {
 		if (fd == fp->f_fd && fp->f_task == task) {
 			ASSERT(atomic_read(&fp->f_ref) != 0);