linux-kernel - Re: [PATCH] hostap: hide unused procfs helpers

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Message-ID: <6ebda7d5-364a-a242-527c-e57ce4888f9b@huawei.com>
Date:   Fri, 13 Jul 2018 17:37:03 +0800
From:   YueHaibing <yuehaibing@...wei.com>
To:     Arend van Spriel <arend.vanspriel@...adcom.com>, <j@...fi>,
        <kvalo@...eaurora.org>
CC:     <linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>,
        <linux-wireless@...r.kernel.org>, <davem@...emloft.net>,
        Randy Dunlap <rdunlap@...radead.org>
Subject: Re: [PATCH] hostap: hide unused procfs helpers


On 2018/7/13 15:26, Arend van Spriel wrote:
> + Randy
> 
> On 7/13/2018 9:03 AM, YueHaibing wrote:
>> When CONFIG_PROC_FS isn't set, gcc warning this:
>>
>> drivers/net/wireless/intersil/hostap/hostap_hw.c:2901:12: warning: ‘prism2_registers_proc_show’ defined but not used [-Wunused-function]
>>   static int prism2_registers_proc_show(struct seq_file *m, void *v)
>>
>> drivers/net/wireless/intersil/hostap/hostap_proc.c:16:12: warning: ‘prism2_debug_proc_show’ defined but not used [-Wunused-function]
>>   static int prism2_debug_proc_show(struct seq_file *m, void *v)
>>              ^
>> drivers/net/wireless/intersil/hostap/hostap_proc.c:49:12: warning: ‘prism2_stats_proc_show’ defined but not used [-Wunused-function]
>>   static int prism2_stats_proc_show(struct seq_file *m, void *v)
>>              ^
>> drivers/net/wireless/intersil/hostap/hostap_proc.c:177:12: warning: ‘prism2_crypt_proc_show’ defined but not used [-Wunused-function]
>>   static int prism2_crypt_proc_show(struct seq_file *m, void *v)
>>              ^
>>
>> fix this by adding #ifdef around them.
>> hfa384x_read_reg is only used by prism2_registers_proc_show,so move it
>> into #ifdef.
> 
> There was already a fix for this posted by Randy Dunlap taking a different approach, ie. use __maybe_unused classifier. To be honest I prefer the ifdef approach as it is more explicit and does not feel like a cheat.
> 
> Actually some of the functions are between a flag already PRISM2_NO_PROCFS_DEBUG which is in a private header file hostap_config.h. Seems like this would be better placed in Kconfig and depend on CONFIG_PROCFS. Anyway, this driver is old cruft. Maybe some people are still running it, but it is probably not worth the effort so fine with either fix.
> 

I dont check Randy's patch. ignore this pls.

> Regards,
> Arend
> 
> .
>