linux-kernel - Re: [PATCH v2] clocksource: Add node counter timer driver for MIPS/Loongson64

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Message-Id: <558b1d58-08a5-410d-97b8-e77def7c1cf8@app.fastmail.com>
Date: Tue, 28 May 2024 15:31:52 +0100
From: "Jiaxun Yang" <jiaxun.yang@...goat.com>
To: "Thomas Gleixner" <tglx@...utronix.de>,
 "Huacai Chen" <chenhuacai@...nel.org>,
 "Thomas Bogendoerfer" <tsbogend@...ha.franken.de>,
 "Daniel Lezcano" <daniel.lezcano@...aro.org>
Cc: linux-kernel@...r.kernel.org,
 "linux-mips@...r.kernel.org" <linux-mips@...r.kernel.org>
Subject: Re: [PATCH v2] clocksource: Add node counter timer driver for MIPS/Loongson64



在2024年5月27日五月 下午5:32，Jiaxun Yang写道：
> 在2024年5月27日五月 下午4:51，Thomas Gleixner写道：
>> Jiaxun!
>>
> Hi Thomas,
> [...]
>>
>> What's this indirection for? Why dont you update 
> [...]
>>
>>> +static struct clocksource nodecnt_clocksource = {
>>> +	.name	= "nodecnt",
>>> +	.read	= nodecnt_clocksource_read,
>>
>> the read function pointer here and spare the indirection?
> Smart! sched_clock takes slightly different function pointer argument type
> but as we don't use the argument anyway, it should be safe to relax this
> indirection.

Sadly, I'm unable to remove it with force type catsing :-/

drivers/clocksource/loongson-nodecnt.c: In function ‘nodecnt_clocksource_init’:
drivers/clocksource/loongson-nodecnt.c:89:36: warning: cast between incompatible function types from ‘u64 (*)(void)’ {aka ‘long long unsigned int (*)(void)’} to ‘u64 (*)(struct clocksource *)’ {aka ‘long long unsigned int (*)(struct clocksource *)’} [-Wcast-function-type]
   89 |         nodecnt_clocksource.read = (u64 (*)(struct clocksource *))nodecnt_read_fn;

I'll leave it here.

Thanks
>
> Will fix in v3.
>
> Thanks
>>
>> Thanks
>>
>>         tglx
>
> -- 
> - Jiaxun

-- 
- Jiaxun