linux-kernel - Re: [PATCH v2] rch/score/include/uapi/asm/ptrace.h: Add prefix 'SCORE

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Message-ID: <53AA0553.6020909@roeck-us.net>
Date:	Tue, 24 Jun 2014 16:10:11 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	David Rientjes <rientjes@...gle.com>
CC:	Chen Gang <gang.chen.5i5j@...il.com>,
	Liqin Chen <liqin.linux@...il.com>,
	Lennox Wu <lennox.wu@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] rch/score/include/uapi/asm/ptrace.h: Add prefix 'SCORE_'
 for related macros

On 06/24/2014 03:51 PM, David Rientjes wrote:
> On Tue, 24 Jun 2014, Guenter Roeck wrote:
>
>>> diff --git a/arch/score/include/uapi/asm/ptrace.h
>>> b/arch/score/include/uapi/asm/ptrace.h
>>> index f59771a..56e2de0 100644
>>> --- a/arch/score/include/uapi/asm/ptrace.h
>>> +++ b/arch/score/include/uapi/asm/ptrace.h
>>> @@ -4,16 +4,29 @@
>>>    #define PTRACE_GETREGS		12
>>>    #define PTRACE_SETREGS		13
>>>
>>> -#define PC		32
>>> -#define CONDITION	33
>>> -#define ECR		34
>>> -#define EMA		35
>>> -#define CEH		36
>>> -#define CEL		37
>>> -#define COUNTER		38
>>> -#define LDCR		39
>>> -#define STCR		40
>>> -#define PSR		41
>>> +#if !defined(__KERNEL__) || !defined(__linux__)
>>> +#define PC			32
>>> +#define CONDITION		33
>>> +#define ECR			34
>>> +#define EMA			35
>>> +#define CEH			36
>>> +#define CEL			37
>>> +#define COUNTER			38
>>> +#define LDCR			39
>>> +#define STCR			40
>>> +#define PSR			41
>>> +#else
>>> +#define SCORE_PC		32
>>> +#define SCORE_CONDITION		33
>>> +#define SCORE_ECR		34
>>> +#define SCORE_EMA		35
>>> +#define SCORE_CEH		36
>>> +#define SCORE_CEL		37
>>> +#define SCORE_COUNTER		38
>>> +#define SCORE_LDCR		39
>>> +#define SCORE_STCR		40
>>> +#define SCORE_PSR		41
>>> +#endif
>>>
>>>    #define SINGLESTEP16_INSN	0x7006
>>>    #define SINGLESTEP32_INSN	0x840C8000
>>>
>> That looks weird ... not sure if that is a good solution either.
>>
>> Are those defines actually used anywhere ? They don't seem to be used in the
>> kernel.
>>
>> Side note - an 'a' got missing in your headline.
>> And I'd suggest to abbreviate it to something like
>> 	score/uapi: ptrace.h:
>>
>
> Besides checking whether they are used in the kernel or not, I presume we
> would need to be fairly confident there are actual userspace usecases for
> these that require the change.  It begs the question of why these
> constants are too generic to be in the kernel but are acceptable in the
> set of userspace applications in the world.
>

That is another question. But for the time being it might be sufficient to
surround the defines with #if !defined(__KERNEL__) without introducing new
(and unused) kernel defines.

Guenter

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