[PATCH 09/13] ANDROID: binder: Don't BUG_ON(!spin_is_locked()).

Martijn Coenen
2017-08-25T09:34:06Z

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 <maco@android.com>
---
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 d6648b5f5988..eb82226be098 100644
--- a/drivers/android/binder.c
+++ b/drivers/android/binder.c
@@ -1013,7 +1013,7 @@ 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);
@@ -1044,7 +1044,7 @@ 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)
@@ -1223,7 +1223,7 @@ 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);
@@ -1269,7 +1269,8 @@ static struct binder_node *binder_init_node_ilocked(
__u32 flags = fp ? fp->flags : 0;
s8 priority;

- BUG_ON(!spin_is_locked(&proc->inner_lock));
+ assert_spin_locked(&proc->inner_lock);
+
while (*p) {

parent = *p;
@@ -1348,9 +1349,9 @@ 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 &&
@@ -1401,9 +1402,9 @@ 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--;
@@ -1927,7 +1928,7 @@ 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 =
@@ -5071,7 +5072,6 @@ 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,
@@ -5160,7 +5160,6 @@ 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,
@@ -5197,10 +5196,6 @@ 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++;
@@ -5227,7 +5222,6 @@ 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,
--
2.14.1.480.gb18f417b89-goog