It's more clear  to use FIELD_SIZEOF instead of its implementation.

Signed-off-by: zhong jiang <zhongji...@huawei.com>
---
 drivers/media/v4l2-core/v4l2-ioctl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c 
b/drivers/media/v4l2-core/v4l2-ioctl.c
index 51b9127..eebea91 100644
--- a/drivers/media/v4l2-core/v4l2-ioctl.c
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -2637,7 +2637,7 @@ struct v4l2_ioctl_info {
 /* Zero struct from after the field to the end */
 #define INFO_FL_CLEAR(v4l2_struct, field)                      \
        ((offsetof(struct v4l2_struct, field) +                 \
-         sizeof(((struct v4l2_struct *)0)->field)) << 16)
+         FIELD_SIZEOF(struct v4l2_struct, field)) << 16)
 #define INFO_FL_CLEAR_MASK     (_IOC_SIZEMASK << 16)
 
 #define DEFINE_V4L_STUB_FUNC(_vidioc)                          \
-- 
1.7.12.4

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