Cleanup COMMON.

Signed-off-by: Khral Steelforge <garuda2550@gmail.com>
Remove duplicate prototype in COMMON, more document comment.

Signed-off-by: Khral Steelforge <garuda2550@gmail.com>
fix compile warnings.

Signed-off-by: Khral Steelforge <garuda2550@gmail.com>
new line at end of file in SCUW.

Signed-off-by: Khral Steelforge <garuda2550@gmail.com>