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drivers/mfd/syscon.c:67:9: error: implicit declaration of function 'ioremap'

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Hi,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   107df03203bb66de56e2caec3bde6d22b55480c5
commit: ca668f0edfae65438c3f0a3ad5d3e59e3515915f mfd: syscon: Set regmap max_register in of_syscon_register
date:   4 months ago
config: um-allmodconfig (attached as .config)
compiler: gcc-6 (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        git checkout ca668f0edfae65438c3f0a3ad5d3e59e3515915f
        # save the attached .config to linux build tree
        make ARCH=um 

All errors (new ones prefixed by >>):

   drivers/mfd/syscon.c: In function 'of_syscon_register':
>> drivers/mfd/syscon.c:67:9: error: implicit declaration of function 'ioremap' [-Werror=implicit-function-declaration]
     base = ioremap(res.start, resource_size(&res));
            ^~~~~~~
   drivers/mfd/syscon.c:67:7: warning: assignment makes pointer from integer without a cast [-Wint-conversion]
     base = ioremap(res.start, resource_size(&res));
          ^
   drivers/mfd/syscon.c:109:2: error: implicit declaration of function 'iounmap' [-Werror=implicit-function-declaration]
     iounmap(base);
     ^~~~~~~
   cc1: some warnings being treated as errors

vim +/ioremap +67 drivers/mfd/syscon.c

    61	
    62		if (of_address_to_resource(np, 0, &res)) {
    63			ret = -ENOMEM;
    64			goto err_map;
    65		}
    66	
  > 67		base = ioremap(res.start, resource_size(&res));
    68		if (!base) {
    69			ret = -ENOMEM;
    70			goto err_map;

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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drivers/mfd/syscon.c:67:9: error: implicit declaration of function  'ioremap' kbuild test robot <fengguang.wu@intel.com> - 2016-07-24 03:50 +0200

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