samples/rpmsg/rpmsg_client_sample.c:66:4: warning: format specifies type 'long' but the argument has type 'ssize_t' (aka 'int')

samples/rpmsg/rpmsg_client_sample.c:66:4: warning: format specifies type 'long' but the argument has type 'ssize_t' (aka 'int')

[kernel test robot]

:::::: 
:::::: Manual check reason: "bisect to a FBC not belonging to original linux-review patches: branch: linux-review/Tanmay-Shah/rpmsg-virtio_rpmsg_bus-allow-different-size-of-tx-and-rx-bufs/20260507-142615, commit: 3e451c450d540c8d733336d136eed8f559eb9038"
:::::: 

BCC: lkp@intel.com
CC: llvm@lists.linux.dev
CC: oe-kbuild-all@lists.linux.dev
TO: Tanmay Shah <tanmay.shah@amd.com>
CC: 0day robot <lkp@intel.com>

tree:   https://github.com/intel-lab-lkp/linux/commits/Tanmay-Shah/rpmsg-virtio_rpmsg_bus-allow-different-size-of-tx-and-rx-bufs/20260507-142615
head:   2496f9ad32bd2e27c5c7006f3c2c5e7f170db4d5
commit: 3e451c450d540c8d733336d136eed8f559eb9038 samples: rpmsg: add mtu size info
date:   10 hours ago
:::::: branch date: 9 hours ago
:::::: commit date: 10 hours ago
config: hexagon-allmodconfig (https://download.01.org/0day-ci/archive/20260508/202605080314.3ReAbbdv-lkp@intel.com/config)
compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260508/202605080314.3ReAbbdv-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/r/202605080314.3ReAbbdv-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> samples/rpmsg/rpmsg_client_sample.c:66:4: warning: format specifies type 'long' but the argument has type 'ssize_t' (aka 'int') [-Wformat]
      65 |         dev_info(&rpdev->dev, "rpmsg mtu size = %ld\n",
         |                                                 ~~~
         |                                                 %zd
      66 |                  rpmsg_get_mtu(rpdev->ept));
         |                  ^~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/dev_printk.h:160:67: note: expanded from macro 'dev_info'
     160 |         dev_printk_index_wrap(_dev_info, KERN_INFO, dev, dev_fmt(fmt), ##__VA_ARGS__)
         |                                                                  ~~~     ^~~~~~~~~~~
   include/linux/dev_printk.h:110:23: note: expanded from macro 'dev_printk_index_wrap'
     110 |                 _p_func(dev, fmt, ##__VA_ARGS__);                       \
         |                              ~~~    ^~~~~~~~~~~
   1 warning generated.


vim +66 samples/rpmsg/rpmsg_client_sample.c

779b96d20ca97cf Ohad Ben-Cohen  2011-10-20  50  
92e1de51bf2cb8d Bjorn Andersson 2016-09-01  51  static int rpmsg_sample_probe(struct rpmsg_device *rpdev)
779b96d20ca97cf Ohad Ben-Cohen  2011-10-20  52  {
779b96d20ca97cf Ohad Ben-Cohen  2011-10-20  53  	int ret;
a138c883193a66c Anna, Suman     2016-08-12  54  	struct instance_data *idata;
779b96d20ca97cf Ohad Ben-Cohen  2011-10-20  55  
779b96d20ca97cf Ohad Ben-Cohen  2011-10-20  56  	dev_info(&rpdev->dev, "new channel: 0x%x -> 0x%x!\n",
779b96d20ca97cf Ohad Ben-Cohen  2011-10-20  57  					rpdev->src, rpdev->dst);
779b96d20ca97cf Ohad Ben-Cohen  2011-10-20  58  
a138c883193a66c Anna, Suman     2016-08-12  59  	idata = devm_kzalloc(&rpdev->dev, sizeof(*idata), GFP_KERNEL);
a138c883193a66c Anna, Suman     2016-08-12  60  	if (!idata)
a138c883193a66c Anna, Suman     2016-08-12  61  		return -ENOMEM;
a138c883193a66c Anna, Suman     2016-08-12  62  
a138c883193a66c Anna, Suman     2016-08-12  63  	dev_set_drvdata(&rpdev->dev, idata);
a138c883193a66c Anna, Suman     2016-08-12  64  
3e451c450d540c8 Tanmay Shah     2026-04-29  65  	dev_info(&rpdev->dev, "rpmsg mtu size = %ld\n",
3e451c450d540c8 Tanmay Shah     2026-04-29 @66  		 rpmsg_get_mtu(rpdev->ept));
3e451c450d540c8 Tanmay Shah     2026-04-29  67  
779b96d20ca97cf Ohad Ben-Cohen  2011-10-20  68  	/* send a message to our remote processor */
2a48d7322dc88f1 Bjorn Andersson 2016-09-01  69  	ret = rpmsg_send(rpdev->ept, MSG, strlen(MSG));
779b96d20ca97cf Ohad Ben-Cohen  2011-10-20  70  	if (ret) {
779b96d20ca97cf Ohad Ben-Cohen  2011-10-20  71  		dev_err(&rpdev->dev, "rpmsg_send failed: %d\n", ret);
779b96d20ca97cf Ohad Ben-Cohen  2011-10-20  72  		return ret;
779b96d20ca97cf Ohad Ben-Cohen  2011-10-20  73  	}
779b96d20ca97cf Ohad Ben-Cohen  2011-10-20  74  
779b96d20ca97cf Ohad Ben-Cohen  2011-10-20  75  	return 0;
779b96d20ca97cf Ohad Ben-Cohen  2011-10-20  76  }
779b96d20ca97cf Ohad Ben-Cohen  2011-10-20  77  

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki