linux-kernel - Re: [PATCH -next] appletalk: use remove_proc

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Date:   Thu, 28 Feb 2019 09:32:40 +0800
From:   YueHaibing <yuehaibing@...wei.com>
To:     kbuild test robot <lkp@...el.com>
CC:     <kbuild-all@...org>, <davem@...emloft.net>, <joe@...ches.com>,
        <gregkh@...uxfoundation.org>, <linux-kernel@...r.kernel.org>,
        <netdev@...r.kernel.org>
Subject: Re: [PATCH -next] appletalk: use remove_proc_subtree to simplify
 procfs code


On 2019/2/28 7:28, kbuild test robot wrote:
> Hi YueHaibing,
> 
> Thank you for the patch! Perhaps something to improve:
> 
> [auto build test WARNING on next-20190227]
> 
> url:    https://github.com/0day-ci/linux/commits/Yue-Haibing/appletalk-use-remove_proc_subtree-to-simplify-procfs-code/20190228-014856
> config: i386-randconfig-s3-02271654 (attached as .config)
> compiler: gcc-6 (Debian 6.5.0-2) 6.5.0 20181026
> reproduce:
>         # save the attached .config to linux build tree
>         make ARCH=i386 
> 
> All warnings (new ones prefixed by >>):
> 
>    In file included from include/linux/init.h:5:0,
>                     from net//appletalk/atalk_proc.c:11:
>    net//appletalk/atalk_proc.c: In function 'atalk_proc_init':
>    include/linux/compiler.h:58:2: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
>      if (__builtin_constant_p(!!(cond)) ? !!(cond) :   \
>      ^
>    include/linux/compiler.h:56:23: note: in expansion of macro '__trace_if'
>     #define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) )
>                           ^~~~~~~~~~
>>> net//appletalk/atalk_proc.c:218:2: note: in expansion of macro 'if'
>      if (!proc_create_seq("atalk/interface", 0444, init_net.proc_net,
>      ^~
>    net//appletalk/atalk_proc.c:220:3: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
>       goto out;
>       ^~~~
>    In file included from include/linux/init.h:5:0,
>                     from net//appletalk/atalk_proc.c:11:
>    include/linux/compiler.h:58:2: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
>      if (__builtin_constant_p(!!(cond)) ? !!(cond) :   \
>      ^
>    include/linux/compiler.h:56:23: note: in expansion of macro '__trace_if'
>     #define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) )
>                           ^~~~~~~~~~
>    net//appletalk/atalk_proc.c:222:2: note: in expansion of macro 'if'
>      if (!proc_create_seq("atalk/route", 0444, init_net.proc_net,
>      ^~
>    net//appletalk/atalk_proc.c:224:3: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
>       goto out;
>       ^~~~
>    In file included from include/linux/init.h:5:0,
>                     from net//appletalk/atalk_proc.c:11:
>    include/linux/compiler.h:58:2: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
>      if (__builtin_constant_p(!!(cond)) ? !!(cond) :   \
>      ^
>    include/linux/compiler.h:56:23: note: in expansion of macro '__trace_if'
>     #define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) )
>                           ^~~~~~~~~~
>    net//appletalk/atalk_proc.c:226:2: note: in expansion of macro 'if'
>      if (!proc_create_seq("atalk/socket", 0444, init_net.proc_net,
>      ^~
>    net//appletalk/atalk_proc.c:228:3: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
>       goto out;
>       ^~~~
>    In file included from include/linux/init.h:5:0,
>                     from net//appletalk/atalk_proc.c:11:
>    include/linux/compiler.h:58:2: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
>      if (__builtin_constant_p(!!(cond)) ? !!(cond) :   \
>      ^
>    include/linux/compiler.h:56:23: note: in expansion of macro '__trace_if'
>     #define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) )
>                           ^~~~~~~~~~
>    net//appletalk/atalk_proc.c:230:2: note: in expansion of macro 'if'
>      if (!proc_create_seq_private("atalk/arp", 0444, init_net.proc_net,
>      ^~
>    net//appletalk/atalk_proc.c:233:3: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
>       goto out;
>       ^~~~
> 

Thanks, will fix in v2.


> vim +/if +218 net//appletalk/atalk_proc.c
> 
>    212	
>    213	int __init atalk_proc_init(void)
>    214	{
>    215		if (!proc_mkdir("atalk", init_net.proc_net))
>    216			return -ENOMEM;
>    217	
>  > 218		if (!proc_create_seq("atalk/interface", 0444, init_net.proc_net,
>    219				    &atalk_seq_interface_ops));
>    220			goto out;
>    221	
>    222		if (!proc_create_seq("atalk/route", 0444, init_net.proc_net,
>    223				    &atalk_seq_route_ops));
>    224			goto out;
>    225	
>    226		if (!proc_create_seq("atalk/socket", 0444, init_net.proc_net,
>    227				    &atalk_seq_socket_ops));
>    228			goto out;
>    229	
>    230		if (!proc_create_seq_private("atalk/arp", 0444, init_net.proc_net,
>    231					     &aarp_seq_ops,
>    232					     sizeof(struct aarp_iter_state), NULL));
>    233			goto out;
>    234	
>    235	out:
>    236		remove_proc_subtree("atalk", init_net.proc_net);
>    237		return -ENOMEM;
>    238	}
>    239	
> 
> ---
> 0-DAY kernel test infrastructure                Open Source Technology Center
> https://lists.01.org/pipermail/kbuild-all                   Intel Corporation
>