linux-kernel - drivers/cxl/core/region.c:753:37: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 3 has type 'resource_size

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <202512131450.UZNtWJqM-lkp@intel.com>
Date: Sat, 13 Dec 2025 14:59:48 +0800
From: kernel test robot <lkp@...el.com>
To: Dave Jiang <dave.jiang@...el.com>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
	Alison Schofield <alison.schofield@...el.com>,
	Ben Cheatham <benjamin.cheatham@....com>,
	Jonathan Cameron <jonathan.cameron@...wei.com>
Subject: drivers/cxl/core/region.c:753:37: warning: format '%llx' expects
 argument of type 'long long unsigned int', but argument 3 has type
 'resource_size_t' {aka 'unsigned int'}

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   a859eca0e4cc96f63ff125dbe5388d961558b0e9
commit: d6602e25819dea2c239972e98e09ba5db4aebd22 cxl/region: Add support to indicate region has extended linear cache
date:   6 weeks ago
config: i386-randconfig-051-20251213 (https://download.01.org/0day-ci/archive/20251213/202512131450.UZNtWJqM-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251213/202512131450.UZNtWJqM-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202512131450.UZNtWJqM-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/cxl/core/region.c: In function 'extended_linear_cache_size_show':
>> drivers/cxl/core/region.c:753:37: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 3 has type 'resource_size_t' {aka 'unsigned int'} [-Wformat=]
     753 |         return sysfs_emit(buf, "%#llx\n", p->cache_size);
         |                                 ~~~~^     ~~~~~~~~~~~~~
         |                                     |      |
         |                                     |      resource_size_t {aka unsigned int}
         |                                     long long unsigned int
         |                                 %#x


vim +753 drivers/cxl/core/region.c

   741	
   742	static ssize_t extended_linear_cache_size_show(struct device *dev,
   743						       struct device_attribute *attr,
   744						       char *buf)
   745	{
   746		struct cxl_region *cxlr = to_cxl_region(dev);
   747		struct cxl_region_params *p = &cxlr->params;
   748		ssize_t rc;
   749	
   750		ACQUIRE(rwsem_read_intr, rwsem)(&cxl_rwsem.region);
   751		if ((rc = ACQUIRE_ERR(rwsem_read_intr, &rwsem)))
   752			return rc;
 > 753		return sysfs_emit(buf, "%#llx\n", p->cache_size);
   754	}
   755	static DEVICE_ATTR_RO(extended_linear_cache_size);
   756	

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