* Re: [PATCH] resource: add WARN_ON_ONCE for resource_size() and document misusage
[not found] <20251208202921.16819-1-ansuelsmth@gmail.com>
@ 2025-12-09 9:54 ` kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2025-12-09 9:54 UTC (permalink / raw)
To: Christian Marangi, Andy Shevchenko, Andrew Morton, linux-kernel
Cc: oe-kbuild-all, Linux Memory Management List, Ilpo Järvinen
Hi Christian,
kernel test robot noticed the following build errors:
[auto build test ERROR on akpm-mm/mm-everything]
[also build test ERROR on linus/master v6.18 next-20251209]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Christian-Marangi/resource-add-WARN_ON_ONCE-for-resource_size-and-document-misusage/20251209-043037
base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link: https://lore.kernel.org/r/20251208202921.16819-1-ansuelsmth%40gmail.com
patch subject: [PATCH] resource: add WARN_ON_ONCE for resource_size() and document misusage
config: openrisc-allnoconfig (https://download.01.org/0day-ci/archive/20251209/202512091733.6IVBDnru-lkp@intel.com/config)
compiler: or1k-linux-gcc (GCC) 15.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251209/202512091733.6IVBDnru-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/oe-kbuild-all/202512091733.6IVBDnru-lkp@intel.com/
All errors (new ones prefixed by >>):
In file included from kernel/resource.c:15:
include/linux/ioport.h: In function 'resource_size':
>> include/linux/ioport.h:302:9: error: implicit declaration of function 'WARN_ON_ONCE' [-Wimplicit-function-declaration]
302 | WARN_ON_ONCE(!res->flags);
| ^~~~~~~~~~~~
vim +/WARN_ON_ONCE +302 include/linux/ioport.h
288
289 /**
290 * resource_size - Get the size of the resource
291 * @res: Resource descriptor
292 *
293 * This MUST be used ONLY with correctly inizialized resource descriptor.
294 * Passing a resource descriptor with zeroed flags will produce a WARN
295 * signaling a misusage of this helper and probably a BUG in the user
296 * of this helper.
297 *
298 * Return: Size of the resource calculated from resource end - start + 1.
299 */
300 static inline resource_size_t resource_size(const struct resource *res)
301 {
> 302 WARN_ON_ONCE(!res->flags);
303 return res->end - res->start + 1;
304 }
305 static inline unsigned long resource_type(const struct resource *res)
306 {
307 return res->flags & IORESOURCE_TYPE_BITS;
308 }
309 static inline unsigned long resource_ext_type(const struct resource *res)
310 {
311 return res->flags & IORESOURCE_EXT_TYPE_BITS;
312 }
313 /* True iff r1 completely contains r2 */
314 static inline bool resource_contains(const struct resource *r1, const struct resource *r2)
315 {
316 if (resource_type(r1) != resource_type(r2))
317 return false;
318 if (r1->flags & IORESOURCE_UNSET || r2->flags & IORESOURCE_UNSET)
319 return false;
320 return r1->start <= r2->start && r1->end >= r2->end;
321 }
322
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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