This patch fixes various missing-prototypes build warnings by: * Mark some functions as static. * Add missing prototypes. Signed-off-by: Shiji Yang <yangshiji66@outlook.com> Link: https://github.com/openwrt/openwrt/pull/18744 Signed-off-by: Robert Marko <robimarko@gmail.com> (cherry picked from commit d81f8e159a338318c690a1b9720a33544cfa612d) Signed-off-by: Nora Matthias Schiffer <neocturne@universe-factory.net> Link: https://github.com/openwrt/openwrt/pull/20440 Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>