linux-kernel - Re: [PATCH 1/3] soc cache: L3 cache driver for HiSilicon SoC

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Message-ID: <202602041006.7Hb46Sl8-lkp@intel.com>
Date: Wed, 4 Feb 2026 10:47:00 +0800
From: kernel test robot <lkp@...el.com>
To: Yushan Wang <wangyushan12@...wei.com>, alexandre.belloni@...tlin.com,
	arnd@...db.de, fustini@...nel.org, Jonathan.Cameron@...wei.com,
	krzk@...nel.org, linus.walleij@...aro.org, will@...nel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc: oe-kbuild-all@...ts.linux.dev, fanghao11@...wei.com,
	linuxarm@...wei.com, liuyonglong@...wei.com,
	prime.zeng@...ilicon.com, wangzhou1@...ilicon.com,
	xuwei5@...ilicon.com, wangyushan12@...wei.com
Subject: Re: [PATCH 1/3] soc cache: L3 cache driver for HiSilicon SoC

Hi Yushan,

kernel test robot noticed the following build errors:

[auto build test ERROR on linus/master]
[also build test ERROR on v6.19-rc8]
[cannot apply to soc/for-next next-20260203]
[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/Yushan-Wang/soc-cache-L3-cache-driver-for-HiSilicon-SoC/20260204-004656
base:   linus/master
patch link:    https://lore.kernel.org/r/20260203161843.649417-2-wangyushan12%40huawei.com
patch subject: [PATCH 1/3] soc cache: L3 cache driver for HiSilicon SoC
config: loongarch-randconfig-r131-20260204 (https://download.01.org/0day-ci/archive/20260204/202602041006.7Hb46Sl8-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 9b8addffa70cee5b2acc5454712d9cf78ce45710)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260204/202602041006.7Hb46Sl8-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/202602041006.7Hb46Sl8-lkp@intel.com/

All errors (new ones prefixed by >>):

>> drivers/soc/hisilicon/hisi_soc_l3c.c:251:7: error: call to undeclared function 'alloc_contig_pages'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     251 |         pg = alloc_contig_pages(1 << order, GFP_KERNEL | __GFP_NOWARN | __GFP_ZERO,
         |              ^
>> drivers/soc/hisilicon/hisi_soc_l3c.c:251:5: error: incompatible integer to pointer conversion assigning to 'struct page *' from 'int' [-Wint-conversion]
     251 |         pg = alloc_contig_pages(1 << order, GFP_KERNEL | __GFP_NOWARN | __GFP_ZERO,
         |            ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     252 |                                 cpu_to_node(smp_processor_id()), NULL);
         |                                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   2 errors generated.


vim +/alloc_contig_pages +251 drivers/soc/hisilicon/hisi_soc_l3c.c

   237	
   238	static int hisi_l3c_mmap(struct file *file, struct vm_area_struct *vma)
   239	{
   240		unsigned long size = vma->vm_end - vma->vm_start;
   241		int order = get_order(size);
   242		unsigned long addr;
   243		struct page *pg;
   244		int ret;
   245	
   246		struct hisi_l3c_lock_region *clr __free(kfree) = kzalloc(sizeof(*clr), GFP_KERNEL);
   247		if (!clr)
   248			return -ENOMEM;
   249	
   250		/* Continuous physical memory is required for L3 cache lock. */
 > 251		pg = alloc_contig_pages(1 << order, GFP_KERNEL | __GFP_NOWARN | __GFP_ZERO,
   252					cpu_to_node(smp_processor_id()), NULL);
   253		if (!pg)
   254			return -ENOMEM;
   255	
   256		addr = page_to_phys(pg);
   257		*clr = (struct hisi_l3c_lock_region) {
   258			.addr = addr,
   259			.size = size,
   260			.cpu = smp_processor_id(),
   261			/* vma should not be moved, store here for validation */
   262			.vm_start = vma->vm_start,
   263			.vm_end = vma->vm_end,
   264		};
   265	
   266		vm_flags_set(vma, VM_DONTCOPY | VM_DONTEXPAND);
   267		vma->vm_ops = &hisi_l3c_vm_ops;
   268		vma->vm_private_data = clr;
   269	
   270		hisi_l3c_vm_ops.open(vma);
   271		if (clr->status) {
   272			ret = clr->status;
   273			goto out_page;
   274		}
   275	
   276		ret = remap_pfn_range(vma, vma->vm_start, PFN_DOWN(addr), size,
   277				      vma->vm_page_prot);
   278		if (ret)
   279			goto out_page;
   280	
   281		/* Save clr from being freed when lock succeeds. */
   282		vma->vm_private_data = no_free_ptr(clr);
   283	
   284		return 0;
   285	
   286	out_page:
   287		free_contig_range(PHYS_PFN(clr->addr), 1 << order);
   288		return ret;
   289	}
   290	

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