CHECK: Comparison to NULL could be written "par->match->check_hooks"
CHECK: Comparison to NULL could be written "par->target->check_hooks"
CHECK: spaces preferred around that '|' (ctx:VxV)
WARNING: function definition argument 'const struct xt_mtchk_param *' should also have an identifier name
WARNING: function definition argument 'const struct xt_tgchk_param *' should also have an identifier name
WARNING: line length of 98 exceeds 80 columns