e1000e: add comment to spinlock_t definition

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/e1000e/e1000.h b/drivers/net/ethernet/intel/e1000e/e1000.h
index c7bc610..e6b9483 100644 (file)
--- a/drivers/net/ethernet/intel/e1000e/e1000.h
+++ b/drivers/net/ethernet/intel/e1000e/e1000.h
@@ -372,7 +372,7 @@ struct e1000_adapter {
        /* structs defined in e1000_hw.h */
        struct e1000_hw hw;
 
-       spinlock_t stats64_lock;
+       spinlock_t stats64_lock;        /* protects statistics counters */
        struct e1000_hw_stats stats;
        struct e1000_phy_info phy_info;
        struct e1000_phy_stats phy_stats;