CHECK: spaces preferred around that '*' (ctx:ExV)
CHECK: spaces required around that ':' (ctx:VxV)
WARNING: Argument '_lookup' is not used in function-like macro
WARNING: Argument '_show' is not used in function-like macro
WARNING: Argument '_symbol_id' is not used in function-like macro
WARNING: externs should be avoided in .c files
WARNING: function definition argument 'struct seq_file *' should also have an identifier name
WARNING: function definition argument 'unsigned long long' should also have an identifier name
WARNING: please, no space before tabs