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

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Message-ID: <201902280710.9KQ8GgpK%fengguang.wu@intel.com>
Date:   Thu, 28 Feb 2019 07:28:45 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Yue Haibing <yuehaibing@...wei.com>
Cc:     kbuild-all@...org, davem@...emloft.net, joe@...ches.com,
        gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, YueHaibing <yuehaibing@...wei.com>
Subject: Re: [PATCH -next] appletalk: use remove_proc_subtree to simplify
 procfs code

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;
      ^~~~

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	

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