[freescale-fslc:pr/642 1577/30000] arch/mips/include/asm/uaccess.h:90:16: error: implicit declaration of function 'uaccess_kernel'

[kernel test robot <lkp@intel.com>]

Hi Gao,

FYI, the error/warning still remains.

tree:   https://github.com/Freescale/linux-fslc pr/642
head:   c8b7cf62c7fea8456dec789d550b8006d73b8f04
commit: b5805df1b1a6c25d66b734c9249ac30c5f419b9d [1577/30000] MLK-14392-1 input: touch: add focaltech touch screen support
config: mips-allmodconfig (https://download.01.org/0day-ci/archive/20231130/202311300047.uhtRcbBV-lkp@intel.com/config)
compiler: mips-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231130/202311300047.uhtRcbBV-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/202311300047.uhtRcbBV-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from drivers/input/touchscreen/focaltech_touch/focaltech_core.h:55,
                    from drivers/input/touchscreen/focaltech_touch/focaltech_core.c:34:
   arch/mips/include/asm/uaccess.h: In function 'eva_kernel_access':
>> arch/mips/include/asm/uaccess.h:90:16: error: implicit declaration of function 'uaccess_kernel' [-Werror=implicit-function-declaration]
      90 |         return uaccess_kernel();
         |                ^~~~~~~~~~~~~~
   drivers/input/touchscreen/focaltech_touch/focaltech_core.c: In function 'fts_parse_dt':
   drivers/input/touchscreen/focaltech_touch/focaltech_core.c:970:31: warning: comparison of unsigned expression in '< 0' is always false [-Wtype-limits]
     970 |         if (pdata->reset_gpio < 0)
         |                               ^
   drivers/input/touchscreen/focaltech_touch/focaltech_core.c:976:29: warning: comparison of unsigned expression in '< 0' is always false [-Wtype-limits]
     976 |         if (pdata->irq_gpio < 0)
         |                             ^
   drivers/input/touchscreen/focaltech_touch/focaltech_core.c: At top level:
   drivers/input/touchscreen/focaltech_touch/focaltech_core.c:1328:12: warning: 'fts_ts_resume' defined but not used [-Wunused-function]
    1328 | static int fts_ts_resume(struct device *dev)
         |            ^~~~~~~~~~~~~
   drivers/input/touchscreen/focaltech_touch/focaltech_core.c:1267:12: warning: 'fts_ts_suspend' defined but not used [-Wunused-function]
    1267 | static int fts_ts_suspend(struct device *dev)
         |            ^~~~~~~~~~~~~~
   cc1: some warnings being treated as errors
--
   In file included from drivers/input/touchscreen/focaltech_touch/focaltech_core.h:55,
                    from drivers/input/touchscreen/focaltech_touch/focaltech_esdcheck.c:38:
   arch/mips/include/asm/uaccess.h: In function 'eva_kernel_access':
>> arch/mips/include/asm/uaccess.h:90:16: error: implicit declaration of function 'uaccess_kernel' [-Werror=implicit-function-declaration]
      90 |         return uaccess_kernel();
         |                ^~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +/uaccess_kernel +90 arch/mips/include/asm/uaccess.h

^1da177e4c3f41 include/asm-mips/uaccess.h      Linus Torvalds  2005-04-16  76  
12060666f5c065 arch/mips/include/asm/uaccess.h Paul Burton     2015-05-24  77  /*
12060666f5c065 arch/mips/include/asm/uaccess.h Paul Burton     2015-05-24  78   * eva_kernel_access() - determine whether kernel memory access on an EVA system
12060666f5c065 arch/mips/include/asm/uaccess.h Paul Burton     2015-05-24  79   *
12060666f5c065 arch/mips/include/asm/uaccess.h Paul Burton     2015-05-24  80   * Determines whether memory accesses should be performed to kernel memory
12060666f5c065 arch/mips/include/asm/uaccess.h Paul Burton     2015-05-24  81   * on a system using Extended Virtual Addressing (EVA).
12060666f5c065 arch/mips/include/asm/uaccess.h Paul Burton     2015-05-24  82   *
12060666f5c065 arch/mips/include/asm/uaccess.h Paul Burton     2015-05-24  83   * Return: true if a kernel memory access on an EVA system, else false.
12060666f5c065 arch/mips/include/asm/uaccess.h Paul Burton     2015-05-24  84   */
12060666f5c065 arch/mips/include/asm/uaccess.h Paul Burton     2015-05-24  85  static inline bool eva_kernel_access(void)
12060666f5c065 arch/mips/include/asm/uaccess.h Paul Burton     2015-05-24  86  {
97f2645f358b41 arch/mips/include/asm/uaccess.h Masahiro Yamada 2016-08-03  87  	if (!IS_ENABLED(CONFIG_EVA))
12060666f5c065 arch/mips/include/asm/uaccess.h Paul Burton     2015-05-24  88  		return false;
12060666f5c065 arch/mips/include/asm/uaccess.h Paul Burton     2015-05-24  89  
db68ce10c4f0a2 arch/mips/include/asm/uaccess.h Al Viro         2017-03-20 @90  	return uaccess_kernel();
12060666f5c065 arch/mips/include/asm/uaccess.h Paul Burton     2015-05-24  91  }
^1da177e4c3f41 include/asm-mips/uaccess.h      Linus Torvalds  2005-04-16  92  

:::::: The code at line 90 was first introduced by commit
:::::: db68ce10c4f0a27c1ff9fa0e789e5c41f8c4ea63 new helper: uaccess_kernel()

:::::: TO: Al Viro <viro@zeniv.linux.org.uk>
:::::: CC: Al Viro <viro@zeniv.linux.org.uk>

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