linux-kernel - Re: [PATCH v2 6/7] of/reserved_mem: Simplify the logic of __reserved_mem_reserve

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Message-ID: <202511140307.Th0UqUd9-lkp@intel.com>
Date: Fri, 14 Nov 2025 03:37:13 +0800
From: kernel test robot <lkp@...el.com>
To: Yuntao Wang <yuntao.wang@...ux.dev>, Rob Herring <robh@...nel.org>,
	Saravana Kannan <saravanak@...gle.com>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Catalin Marinas <catalin.marinas@....com>,
	James Morse <james.morse@....com>, Baoquan He <bhe@...hat.com>,
	Zhen Lei <thunder.leizhen@...wei.com>,
	Ard Biesheuvel <ardb@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Geoff Levand <geoff@...radead.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Memory Management List <linux-mm@...ck.org>,
	Changyuan Lyu <changyuanl@...gle.com>,
	Alexander Graf <graf@...zon.com>,
	"Mike Rapoport (Microsoft)" <rppt@...nel.org>,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	Yuntao Wang <yuntao.wang@...ux.dev>
Subject: Re: [PATCH v2 6/7] of/reserved_mem: Simplify the logic of
 __reserved_mem_reserve_reg()

Hi Yuntao,

kernel test robot noticed the following build errors:

[auto build test ERROR on robh/for-next]
[also build test ERROR on linus/master v6.18-rc5 next-20251113]
[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/Yuntao-Wang/of-fdt-Consolidate-duplicate-code-into-helper-functions/20251114-004121
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
patch link:    https://lore.kernel.org/r/20251113155104.226617-7-yuntao.wang%40linux.dev
patch subject: [PATCH v2 6/7] of/reserved_mem: Simplify the logic of __reserved_mem_reserve_reg()
config: arm-allnoconfig (https://download.01.org/0day-ci/archive/20251114/202511140307.Th0UqUd9-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 0bba1e76581bad04e7d7f09f5115ae5e2989e0d9)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251114/202511140307.Th0UqUd9-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/202511140307.Th0UqUd9-lkp@intel.com/

All errors (new ones prefixed by >>):

>> drivers/of/of_reserved_mem.c:175:31: error: incompatible pointer types passing 'phys_addr_t *' (aka 'unsigned int *') to parameter of type 'u64 *' (aka 'unsigned long long *') [-Wincompatible-pointer-types]
     175 |                 of_fdt_read_addr_size(prop, &base, &size);
         |                                             ^~~~~
   include/linux/of_fdt.h:62:60: note: passing argument to parameter 'addr' here
      62 | extern void of_fdt_read_addr_size(const __be32 *prop, u64 *addr, u64 *size);
         |                                                            ^
   drivers/of/of_reserved_mem.c:175:38: error: incompatible pointer types passing 'phys_addr_t *' (aka 'unsigned int *') to parameter of type 'u64 *' (aka 'unsigned long long *') [-Wincompatible-pointer-types]
     175 |                 of_fdt_read_addr_size(prop, &base, &size);
         |                                                    ^~~~~
   include/linux/of_fdt.h:62:71: note: passing argument to parameter 'size' here
      62 | extern void of_fdt_read_addr_size(const __be32 *prop, u64 *addr, u64 *size);
         |                                                                       ^
   2 errors generated.


vim +175 drivers/of/of_reserved_mem.c

   150	
   151	/*
   152	 * __reserved_mem_reserve_reg() - reserve all memory described in 'reg' property
   153	 */
   154	static int __init __reserved_mem_reserve_reg(unsigned long node,
   155						     const char *uname)
   156	{
   157		phys_addr_t base, size;
   158		int len;
   159		const __be32 *prop;
   160		bool nomap;
   161	
   162		prop = of_fdt_get_addr_size_prop(node, "reg", &len);
   163		if (!len)
   164			return -ENOENT;
   165	
   166		if (len < 0) {
   167			pr_err("Reserved memory: invalid reg property in '%s', skipping node.\n",
   168			       uname);
   169			return -EINVAL;
   170		}
   171	
   172		nomap = of_get_flat_dt_prop(node, "no-map", NULL) != NULL;
   173	
   174		while (len-- > 0) {
 > 175			of_fdt_read_addr_size(prop, &base, &size);
   176	
   177			if (size && early_init_dt_reserve_memory(base, size, nomap) == 0) {
   178				/* Architecture specific contiguous memory fixup. */
   179				if (of_flat_dt_is_compatible(node, "shared-dma-pool") &&
   180				    of_get_flat_dt_prop(node, "reusable", NULL))
   181					dma_contiguous_early_fixup(base, size);
   182				pr_debug("Reserved memory: reserved region for node '%s': base %pa, size %lu MiB\n",
   183					uname, &base, (unsigned long)(size / SZ_1M));
   184			} else {
   185				pr_err("Reserved memory: failed to reserve memory for node '%s': base %pa, size %lu MiB\n",
   186				       uname, &base, (unsigned long)(size / SZ_1M));
   187			}
   188		}
   189		return 0;
   190	}
   191	

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