[PATCH 2/3] hwspinlock/core: add notes on lock element in 'struct hwspinlock'

[shinya.kuribayashi.px@renesas.com (Shinya Kuribayashi)]

'lock' must be placed at the end of struct hwspinlock_device because
we're doing 'hwlock = &bank->lock[0]' to get a pointer to the first
'struct hwspinlock' instance.

Signed-off-by: Shinya Kuribayashi <shinya.kuribayashi.px@renesas.com>
---
 drivers/hwspinlock/hwspinlock_internal.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/hwspinlock/hwspinlock_internal.h b/drivers/hwspinlock/hwspinlock_internal.h
index d26f78b..c60318c 100644
--- a/drivers/hwspinlock/hwspinlock_internal.h
+++ b/drivers/hwspinlock/hwspinlock_internal.h
@@ -57,7 +57,8 @@ struct hwspinlock {
  * @ops: platform-specific hwspinlock handlers
  * @base_id: id index of the first lock in this device
  * @num_locks: number of locks in this device
- * @lock: dynamically allocated array of 'struct hwspinlock'
+ * @lock: dynamically allocated array of 'struct hwspinlock' (must be placed
+ *	  at the end of the hwspinlock_device)
  */
 struct hwspinlock_device {
 	struct device *dev;
-- 
1.7.11.1