From 858b2719686ddd0ab5fc77479a46d16f90e6b7da Mon Sep 17 00:00:00 2001 From: Martijn Coenen Date: Thu, 31 Aug 2017 10:04:26 +0200 Subject: [PATCH] ANDROID: binder: Don't BUG_ON(!spin_is_locked()). Because is_spin_locked() always returns false on UP systems. Use assert_spin_locked() instead, and remove the WARN_ON() instances, since those were easy to verify. Signed-off-by: Martijn Coenen Signed-off-by: Greg Kroah-Hartman --- drivers/android/binder.c | 26 ++++++++++---------------- 1 file changed, 10 insertions(+), 16 deletions(-) diff --git a/drivers/android/binder.c b/drivers/android/binder.c index eb8bd8d7c4c9..afe6ac37e1ca 100644 --- a/drivers/android/binder.c +++ b/drivers/android/binder.c @@ -987,7 +987,7 @@ binder_select_thread_ilocked(struct binder_proc *proc) { struct binder_thread *thread; - BUG_ON(!spin_is_locked(&proc->inner_lock)); + assert_spin_locked(&proc->inner_lock); thread = list_first_entry_or_null(&proc->waiting_threads, struct binder_thread, waiting_thread_node); @@ -1018,7 +1018,7 @@ static void binder_wakeup_thread_ilocked(struct binder_proc *proc, struct binder_thread *thread, bool sync) { - BUG_ON(!spin_is_locked(&proc->inner_lock)); + assert_spin_locked(&proc->inner_lock); if (thread) { if (sync) @@ -1075,7 +1075,7 @@ static struct binder_node *binder_get_node_ilocked(struct binder_proc *proc, struct rb_node *n = proc->nodes.rb_node; struct binder_node *node; - BUG_ON(!spin_is_locked(&proc->inner_lock)); + assert_spin_locked(&proc->inner_lock); while (n) { node = rb_entry(n, struct binder_node, rb_node); @@ -1120,7 +1120,8 @@ static struct binder_node *binder_init_node_ilocked( binder_uintptr_t cookie = fp ? fp->cookie : 0; __u32 flags = fp ? fp->flags : 0; - BUG_ON(!spin_is_locked(&proc->inner_lock)); + assert_spin_locked(&proc->inner_lock); + while (*p) { parent = *p; @@ -1195,9 +1196,9 @@ static int binder_inc_node_nilocked(struct binder_node *node, int strong, { struct binder_proc *proc = node->proc; - BUG_ON(!spin_is_locked(&node->lock)); + assert_spin_locked(&node->lock); if (proc) - BUG_ON(!spin_is_locked(&proc->inner_lock)); + assert_spin_locked(&proc->inner_lock); if (strong) { if (internal) { if (target_list == NULL && @@ -1248,9 +1249,9 @@ static bool binder_dec_node_nilocked(struct binder_node *node, { struct binder_proc *proc = node->proc; - BUG_ON(!spin_is_locked(&node->lock)); + assert_spin_locked(&node->lock); if (proc) - BUG_ON(!spin_is_locked(&proc->inner_lock)); + assert_spin_locked(&proc->inner_lock); if (strong) { if (internal) node->internal_strong_refs--; @@ -1774,7 +1775,7 @@ static void binder_pop_transaction_ilocked(struct binder_thread *target_thread, struct binder_transaction *t) { BUG_ON(!target_thread); - BUG_ON(!spin_is_locked(&target_thread->proc->inner_lock)); + assert_spin_locked(&target_thread->proc->inner_lock); BUG_ON(target_thread->transaction_stack != t); BUG_ON(target_thread->transaction_stack->from != target_thread); target_thread->transaction_stack = @@ -4896,7 +4897,6 @@ static void print_binder_transaction_ilocked(struct seq_file *m, struct binder_proc *to_proc; struct binder_buffer *buffer = t->buffer; - WARN_ON(!spin_is_locked(&proc->inner_lock)); spin_lock(&t->lock); to_proc = t->to_proc; seq_printf(m, @@ -4984,7 +4984,6 @@ static void print_binder_thread_ilocked(struct seq_file *m, size_t start_pos = m->count; size_t header_pos; - WARN_ON(!spin_is_locked(&thread->proc->inner_lock)); seq_printf(m, " thread %d: l %02x need_return %d tr %d\n", thread->pid, thread->looper, thread->looper_need_return, @@ -5021,10 +5020,6 @@ static void print_binder_node_nilocked(struct seq_file *m, struct binder_work *w; int count; - WARN_ON(!spin_is_locked(&node->lock)); - if (node->proc) - WARN_ON(!spin_is_locked(&node->proc->inner_lock)); - count = 0; hlist_for_each_entry(ref, &node->refs, node_entry) count++; @@ -5050,7 +5045,6 @@ static void print_binder_node_nilocked(struct seq_file *m, static void print_binder_ref_olocked(struct seq_file *m, struct binder_ref *ref) { - WARN_ON(!spin_is_locked(&ref->proc->outer_lock)); binder_node_lock(ref->node); seq_printf(m, " ref %d: desc %d %snode %d s %d w %d d %pK\n", ref->data.debug_id, ref->data.desc,