Date:   Tue, 1 Aug 2017 07:15:23 +0800
From:   kbuild test robot <lkp@...el.com>
To:     William Breathitt Gray <vilhelm.gray@...il.com>
Cc:     kbuild-all@...org, jic23@...nel.org, knaack.h@....de,
        lars@...afoo.de, pmeerw@...erw.net, benjamin.gaignard@...aro.org,
        linux-kernel@...r.kernel.org, linux-iio@...r.kernel.org,
        William Breathitt Gray <vilhelm.gray@...il.com>
Subject: Re: [PATCH 2/3] iio: Introduce the generic counter interface

Hi William,

[auto build test WARNING on iio/togreg]
[cannot apply to v4.13-rc3 next-20170731]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/William-Breathitt-Gray/iio-Introduce-the-generic-counter-interface/20170801-050943
base:   https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git togreg
config: xtensa-allmodconfig (attached as .config)
compiler: xtensa-linux-gcc (GCC) 4.9.0
reproduce:
        wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=xtensa 

All warnings (new ones prefixed by >>):

   drivers/iio/industrialio-counter.c: In function '__iio_counter_value_ext_info_alloc':
>> drivers/iio/industrialio-counter.c:466:23: warning: assignment makes integer from pointer without a cast
      ext_info[i].private = (void *)&trigger_pos->signal->id;
                          ^
   drivers/iio/industrialio-counter.c:476:23: warning: assignment makes integer from pointer without a cast
      ext_info[i].private = (void *)&trigger_pos->signal->id;
                          ^

vim +466 drivers/iio/industrialio-counter.c

   388	
   389	static int __iio_counter_value_ext_info_alloc(struct iio_chan_spec *const chan,
   390		struct iio_counter_value *const value)
   391	{
   392		const struct iio_chan_spec_ext_info ext_info_default[] = {
   393			{
   394				.name = "name",
   395				.shared = IIO_SEPARATE,
   396				.read = __iio_counter_value_name_read
   397			},
   398			IIO_ENUM("function", IIO_SEPARATE, &value->function_enum),
   399			{
   400				.name = "function_available",
   401				.shared = IIO_SEPARATE,
   402				.read = iio_enum_available_read,
   403				.private = (uintptr_t)((void *)&value->function_enum)
   404			},
   405			{
   406				.name = "triggers",
   407				.shared = IIO_SEPARATE,
   408				.read = __iio_counter_value_triggers_read
   409			}
   410		};
   411		const size_t num_default = ARRAY_SIZE(ext_info_default);
   412		const struct iio_chan_spec_ext_info ext_info_trigger[] = {
   413			{
   414				.shared = IIO_SEPARATE,
   415				.read = __iio_counter_trigger_mode_read,
   416				.write = __iio_counter_trigger_mode_write
   417			},
   418			{
   419				.shared = IIO_SEPARATE,
   420				.read = __iio_counter_trigger_mode_available_read
   421			}
   422		};
   423		const size_t num_ext_info_trigger = ARRAY_SIZE(ext_info_trigger);
   424		const struct list_head *pos;
   425		size_t num_triggers = 0;
   426		size_t num_triggers_ext_info;
   427		size_t num_ext_info;
   428		int err;
   429		struct iio_chan_spec_ext_info *ext_info;
   430		const struct iio_counter_trigger *trigger_pos;
   431		size_t i;
   432	
   433		value->function_enum.items = value->function_modes;
   434		value->function_enum.num_items = value->num_function_modes;
   435		value->function_enum.set = __iio_counter_value_function_set;
   436		value->function_enum.get = __iio_counter_value_function_get;
   437	
   438		mutex_lock(&value->trigger_list_lock);
   439	
   440		list_for_each(pos, &value->trigger_list)
   441			num_triggers++;
   442	
   443		num_triggers_ext_info = num_ext_info_trigger * num_triggers;
   444		num_ext_info = num_default + num_triggers_ext_info + 1;
   445	
   446		ext_info = kmalloc_array(num_ext_info, sizeof(*ext_info), GFP_KERNEL);
   447		if (!ext_info) {
   448			err = -ENOMEM;
   449			goto err_ext_info_alloc;
   450		}
   451		ext_info[num_ext_info - 1].name = NULL;
   452	
   453		memcpy(ext_info, ext_info_default, sizeof(ext_info_default));
   454		for (i = 0; i < num_triggers_ext_info; i += num_ext_info_trigger)
   455			memcpy(ext_info + num_default + i, ext_info_trigger,
   456				sizeof(ext_info_trigger));
   457	
   458		i = num_default;
   459		list_for_each_entry(trigger_pos, &value->trigger_list, list) {
   460			ext_info[i].name = kasprintf(GFP_KERNEL, "trigger_signal%d-%d",
   461				chan->channel, trigger_pos->signal->id);
   462			if (!ext_info[i].name) {
   463				err = -ENOMEM;
   464				goto err_name_alloc;
   465			}
 > 466			ext_info[i].private = (void *)&trigger_pos->signal->id;
   467			i++;
   468	
   469			ext_info[i].name = kasprintf(GFP_KERNEL,
   470				"trigger_signal%d-%d_available",
   471				chan->channel, trigger_pos->signal->id);
   472			if (!ext_info[i].name) {
   473				err = -ENOMEM;
   474				goto err_name_alloc;
   475			}
   476			ext_info[i].private = (void *)&trigger_pos->signal->id;
   477			i++;
   478		}
   479	
   480		chan->ext_info = ext_info;
   481	
   482		mutex_unlock(&value->trigger_list_lock);
   483	
   484		return 0;
   485	
   486	err_name_alloc:
   487		while (i-- > num_default)
   488			kfree(ext_info[i].name);
   489		kfree(ext_info);
   490	err_ext_info_alloc:
   491		mutex_unlock(&value->trigger_list_lock);
   492		return err;
   493	}
   494	

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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