Commits
Masahiro Yamada committed 6990e91f097
linux/bitfield.h: import <linux/bitfield.h> from Linux 4.13 Copied from Linux 4.13. Commit log of 3e9b3112ec74 of Linux explains well why this header is useful. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>