Checkpatch bad Warning (Re: [PATCH] powerpc/kgdb: add kgdb_arch_set/remove_breakpoint())

[Christophe LEROY]

Le 20/09/2018 à 15:13, Michael Ellerman a écrit :
> Joe Perches <joe at perches.com> writes:
> 
>> On Tue, 2018-09-18 at 09:33 +0000, Christophe Leroy wrote:
>>> On the below patch, checkpatch reports
>>>
>>> WARNING: struct kgdb_arch should normally be const
>>> #127: FILE: arch/powerpc/kernel/kgdb.c:480:
>>> +struct kgdb_arch arch_kgdb_ops;
>>>
>>> But when I add 'const', I get compilation failure
>>
>> So don't add const.
>>
>> checkpatch is stupid.  You are not.
>>
>> _Always_ take checkpatch bleats with very
>> large grains of salt.
>>
>> Perhaps send a patch to remove kgbd_arch
>> from scripts/const_structs.checkpatch as
>> it seems not ever to be const.
> 
> I think it could/should be const though, it just requires updating all
> arches.
> 

Yes I was thinking about doing it, but first thing is to change the way 
MIPS initialises it:


struct kgdb_arch arch_kgdb_ops;

int kgdb_arch_init(void)
{
	union mips_instruction insn = {
		.r_format = {
			.opcode = spec_op,
			.func	= break_op,
		}
	};
	memcpy(arch_kgdb_ops.gdb_bpt_instr, insn.byte, BREAK_INSTR_SIZE);


Can this be done staticaly ?

Christophe