Add a section explaining KF_IMPLICIT_ARGS kfunc flag. Remove __prog arg annotation, as it is no longer supported. Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev> Link: https://lore.kernel.org/r/20260120223027.3981805-1-ihor.solodrai@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>