linux-kernel - drivers/mtd/nand/ecc-realtek.c:443:undefined reference to `dma_free

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Message-ID: <202511071114.8WeW2GZK-lkp@intel.com>
Date: Fri, 7 Nov 2025 11:39:11 +0800
From: kernel test robot <lkp@...el.com>
To: Markus Stockhausen <markus.stockhausen@....de>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
	Miquel Raynal <miquel.raynal@...tlin.com>
Subject: drivers/mtd/nand/ecc-realtek.c:443:undefined reference to
 `dma_free_pages'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   4a0c9b3391999818e2c5b93719699b255be1f682
commit: 3148d0e5b1c5733d69ec51b70c8280e46488750a mtd: nand: realtek-ecc: Add Realtek external ECC engine support
date:   6 weeks ago
config: sh-randconfig-r121-20251107 (https://download.01.org/0day-ci/archive/20251107/202511071114.8WeW2GZK-lkp@intel.com/config)
compiler: sh4-linux-gcc (GCC) 15.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251107/202511071114.8WeW2GZK-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/202511071114.8WeW2GZK-lkp@intel.com/

All errors (new ones prefixed by >>):

   sh4-linux-ld: drivers/mtd/nand/ecc-realtek.o: in function `rtl_ecc_remove':
>> drivers/mtd/nand/ecc-realtek.c:443:(.text+0x1f8): undefined reference to `dma_free_pages'
   sh4-linux-ld: drivers/mtd/nand/ecc-realtek.o: in function `rtl_ecc_probe':
>> drivers/mtd/nand/ecc-realtek.c:434:(.text+0x2e8): undefined reference to `dma_alloc_pages'
   sh4-linux-ld: drivers/media/i2c/tc358746.o: in function `tc358746_probe':
   drivers/media/i2c/tc358746.c:1585:(.text+0x15cc): undefined reference to `devm_clk_hw_register'
   sh4-linux-ld: drivers/media/i2c/tc358746.c:1610:(.text+0x163c): undefined reference to `devm_of_clk_add_hw_provider'
   sh4-linux-ld: drivers/media/i2c/tc358746.c:1610:(.text+0x1640): undefined reference to `of_clk_hw_simple_get'


vim +443 drivers/mtd/nand/ecc-realtek.c

   389	
   390	static int rtl_ecc_probe(struct platform_device *pdev)
   391	{
   392		struct device *dev = &pdev->dev;
   393		struct rtl_ecc_engine *rtlc;
   394		void __iomem *base;
   395		int ret;
   396	
   397		rtlc = devm_kzalloc(dev, sizeof(*rtlc), GFP_KERNEL);
   398		if (!rtlc)
   399			return -ENOMEM;
   400	
   401		base = devm_platform_ioremap_resource(pdev, 0);
   402		if (IS_ERR(base))
   403			return PTR_ERR(base);
   404	
   405		ret = devm_mutex_init(dev, &rtlc->lock);
   406		if (ret)
   407			return ret;
   408	
   409		rtlc->regmap = devm_regmap_init_mmio(dev, base, &rtl_ecc_regmap_config);
   410		if (IS_ERR(rtlc->regmap))
   411			return PTR_ERR(rtlc->regmap);
   412	
   413		/*
   414		 * Focus on simplicity and use a preallocated DMA buffer for data exchange with the
   415		 * engine. For now make it a noncoherent memory model as invalidating/flushing caches
   416		 * is faster than reading/writing uncached memory on the known architectures.
   417		 */
   418	
   419		rtlc->buf = dma_alloc_noncoherent(dev, RTL_ECC_DMA_SIZE, &rtlc->buf_dma,
   420						  DMA_BIDIRECTIONAL, GFP_KERNEL);
   421		if (IS_ERR(rtlc->buf))
   422			return PTR_ERR(rtlc->buf);
   423	
   424		rtlc->dev = dev;
   425		rtlc->engine.dev = dev;
   426		rtlc->engine.ops = &rtl_ecc_engine_ops;
   427		rtlc->engine.integration = NAND_ECC_ENGINE_INTEGRATION_EXTERNAL;
   428	
   429		nand_ecc_register_on_host_hw_engine(&rtlc->engine);
   430	
   431		platform_set_drvdata(pdev, rtlc);
   432	
   433		return 0;
 > 434	}
   435	
   436	static void rtl_ecc_remove(struct platform_device *pdev)
   437	{
   438		struct rtl_ecc_engine *rtlc = platform_get_drvdata(pdev);
   439	
   440		nand_ecc_unregister_on_host_hw_engine(&rtlc->engine);
   441		dma_free_noncoherent(rtlc->dev, RTL_ECC_DMA_SIZE, rtlc->buf, rtlc->buf_dma,
   442				     DMA_BIDIRECTIONAL);
 > 443	}
   444	

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