From adc4633c86f3358fce676b6c7ce75055e395123a Mon Sep 17 00:00:00 2001 From: Dmitry Torokhov Date: Wed, 24 Oct 2012 23:53:01 -0700 Subject: [PATCH] Input: fix sparse warning in __input_release_device() This fixes the following warning: drivers/input/input.c:538:23: error: incompatible types in comparison expression (different address spaces) Signed-off-by: Dmitry Torokhov --- drivers/input/input.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/input/input.c b/drivers/input/input.c index 53a0dde..f1be1a7 100644 --- a/drivers/input/input.c +++ b/drivers/input/input.c @@ -534,8 +534,11 @@ EXPORT_SYMBOL(input_grab_device); static void __input_release_device(struct input_handle *handle) { struct input_dev *dev = handle->dev; + struct input_handle *grabber; - if (dev->grab == handle) { + grabber = rcu_dereference_protected(dev->grab, + lockdep_is_held(&dev->mutex)); + if (grabber == handle) { rcu_assign_pointer(dev->grab, NULL); /* Make sure input_pass_event() notices that grab is gone */ synchronize_rcu(); -- 2.7.4