linux-kernel - Re: [PATCH 1/3] use lock for 64-bit stats

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Message-ID: <4B6060F2.3070702@vflare.org>
Date:	Wed, 27 Jan 2010 21:21:14 +0530
From:	Nitin Gupta <ngupta@...are.org>
To:	Pekka Enberg <penberg@...helsinki.fi>
CC:	Greg KH <greg@...ah.com>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/3] use lock for 64-bit stats

On 01/27/2010 08:40 PM, Pekka Enberg wrote:
> Nitin Gupta wrote:
>> +static void stat_dec(u32 *v)
>> +{
>> +    *v = *v - 1;
>> +}
>> +
>> +static void stat64_inc(struct ramzswap *rzs, u64 *v)
>> +{
>> +    spin_lock(&rzs->stat64_lock);
>> +    *v = *v + 1;
>> +    spin_unlock(&rzs->stat64_lock);
>> +}
>> +
>> +static void stat64_dec(struct ramzswap *rzs, u64 *v)
>> +{
>> +    spin_lock(&rzs->stat64_lock);
>> +    *v = *v - 1;
>> +    spin_unlock(&rzs->stat64_lock);
>> +}
>> +
>> +static u64 stat64_read(struct ramzswap *rzs, u64 *v)
>> +{
>> +    u64 val;
>> +
>> +    spin_lock(&rzs->stat64_lock);
>> +    val = *v;
>> +    spin_unlock(&rzs->stat64_lock);
>> +
>> +    return val;
>> +}
>> +#else
>> +#define stat_inc(v)
>> +#define stat_dec(v)
>> +#define stat64_inc(r, v)
>> +#define stat64_dec(r, v)
>> +#define stat64_read(r, v)
>> +#endif /* CONFIG_RAMZSWAP_STATS */
> 
> I think I complained about this before: the names are too generic and
> could collide with core kernel code. I think they ought to be called
> ramzsawp_stat*().
> 


I somehow missed this point. I will rename these to rzs_stat*()
('rzs_' prefix is used for other one-liner functions too).

Thanks,
Nitin
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