[agraf-2.6:kexec-cma 2/2] kernel/kexec_file.c:661:45: warning: format specifies type 'int' but the argument has type 'unsigned long'

[agraf-2.6:kexec-cma 2/2] kernel/kexec_file.c:661:45: warning: format specifies type 'int' but the argument has type 'unsigned long'

[kernel test robot]

tree:   https://github.com/agraf/linux-2.6.git kexec-cma
head:   752619bbe38c535612b1a9e5b47ea7d962c63449
commit: 752619bbe38c535612b1a9e5b47ea7d962c63449 [2/2] XXX
config: x86_64-buildonly-randconfig-001-20250510 (https://download.01.org/0day-ci/archive/20250510/202505102142.kLGAquhf-lkp@intel.com/config)
compiler: clang version 20.1.2 (https://github.com/llvm/llvm-project 58df0ef89dd64126512e4ee27b4ac3fd8ddf6247)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250510/202505102142.kLGAquhf-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/202505102142.kLGAquhf-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> kernel/kexec_file.c:661:45: warning: format specifies type 'int' but the argument has type 'unsigned long' [-Wformat]
     661 |         pr_warn("Allocated %d pages DMA memory\n", kbuf->memsz >> PAGE_SHIFT);
         |                            ~~                      ^~~~~~~~~~~~~~~~~~~~~~~~~
         |                            %lu
   include/linux/printk.h:560:37: note: expanded from macro 'pr_warn'
     560 |         printk(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
         |                                    ~~~     ^~~~~~~~~~~
   include/linux/printk.h:507:60: note: expanded from macro 'printk'
     507 | #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__)
         |                                                     ~~~    ^~~~~~~~~~~
   include/linux/printk.h:479:19: note: expanded from macro 'printk_index_wrap'
     479 |                 _p_func(_fmt, ##__VA_ARGS__);                           \
         |                         ~~~~    ^~~~~~~~~~~
   1 warning generated.


vim +661 kernel/kexec_file.c

   635	
   636	static int kexec_alloc_contig(struct kexec_buf *kbuf)
   637	{
   638		struct page *p;
   639		unsigned long mem;
   640		u32 i;
   641	
   642		p = dma_alloc_from_contiguous(NULL, kbuf->memsz >> PAGE_SHIFT,
   643					      get_order(kbuf->buf_align), true);
   644	
   645		if (!p)
   646			return -EADDRNOTAVAIL;
   647	
   648		/* Add the relevant pages to our dest_pages list so we find them later */
   649		for (i = 0; i < kbuf->memsz >> PAGE_SHIFT; i++)
   650			list_add(&p[i].lru, &kbuf->image->dest_pages);
   651	
   652		mem = page_to_boot_pfn(p) << PAGE_SHIFT;
   653	
   654		if (kimage_is_destination_range(kbuf->image, mem, mem + kbuf->memsz)) {
   655			/* Our region is already in use by a statically defined one. Bail out. */
   656			pr_warn("kexec: CMA overlaps existing mem: 0x%lx+0x%lx\n", mem, kbuf->memsz);
   657			return -EADDRNOTAVAIL;
   658		}
   659	
   660		kbuf->mem = page_to_boot_pfn(p) << PAGE_SHIFT;
 > 661		pr_warn("Allocated %d pages DMA memory\n", kbuf->memsz >> PAGE_SHIFT);
   662	
   663		return 0;
   664	}
   665	

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https://github.com/intel/lkp-tests/wiki