compat: backport netdev_refcnt_read.

Backport of upstream commit:
	29b4433d991c88d86ca48a4c1cc33c671475be4b
	net: percpu net_device refcount

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

diff --git a/include/linux/compat-2.6.37.h b/include/linux/compat-2.6.37.h
index e993f753febb9063cbbfddebee55d0f68439befc..cee23a8966675e03185921dca23ce7ca0adc83b2 100644 (file)
--- a/include/linux/compat-2.6.37.h
+++ b/include/linux/compat-2.6.37.h
@@ -108,6 +108,8 @@ extern void compat_led_brightness_set(struct led_classdev *led_cdev,
 
 #define alloc_ordered_workqueue(name, flags) create_singlethread_workqueue(name)
 
+#define netdev_refcnt_read(a) atomic_read(&a->refcnt)
+
 #endif /* (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,37)) */
 
 #endif /* LINUX_26_37_COMPAT_H */