diff options
| author | Todd Kjos <tkjos@android.com> | 2017-06-29 12:01:45 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-07-17 14:47:29 +0200 |
| commit | 656a800aad6051ccc81b26c388a2a7a1c8cc8c81 (patch) | |
| tree | ba7b4cbe824257fd6497b46cf294d03f2c0a1a0f /drivers/android | |
| parent | 0953c7976c36ce06a4e92b9a23cfb8f1bbe2321f (diff) | |
binder: make binder_last_id an atomic
Use an atomic for binder_last_id to avoid locking it
Signed-off-by: Todd Kjos <tkjos@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/android')
| -rw-r--r-- | drivers/android/binder.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/android/binder.c b/drivers/android/binder.c index cd4191d027e1..25f30d81c7d0 100644 --- a/drivers/android/binder.c +++ b/drivers/android/binder.c @@ -59,7 +59,7 @@ static DEFINE_SPINLOCK(binder_dead_nodes_lock); static struct dentry *binder_debugfs_dir_entry_root; static struct dentry *binder_debugfs_dir_entry_proc; -static int binder_last_id; +static atomic_t binder_last_id; #define BINDER_DEBUG_ENTRY(name) \ static int binder_##name##_open(struct inode *inode, struct file *file) \ @@ -496,7 +496,7 @@ static struct binder_node *binder_new_node(struct binder_proc *proc, binder_stats_created(BINDER_STAT_NODE); rb_link_node(&node->rb_node, parent, p); rb_insert_color(&node->rb_node, &proc->nodes); - node->debug_id = ++binder_last_id; + node->debug_id = atomic_inc_return(&binder_last_id); node->proc = proc; node->ptr = ptr; node->cookie = cookie; @@ -639,7 +639,7 @@ static struct binder_ref *binder_get_ref_for_node(struct binder_proc *proc, if (new_ref == NULL) return NULL; binder_stats_created(BINDER_STAT_REF); - new_ref->debug_id = ++binder_last_id; + new_ref->debug_id = atomic_inc_return(&binder_last_id); new_ref->proc = proc; new_ref->node = node; rb_link_node(&new_ref->rb_node_node, parent, p); @@ -1527,7 +1527,7 @@ static void binder_transaction(struct binder_proc *proc, } binder_stats_created(BINDER_STAT_TRANSACTION_COMPLETE); - t->debug_id = ++binder_last_id; + t->debug_id = atomic_inc_return(&binder_last_id); e->debug_id = t->debug_id; if (reply) |