Re: [PATCH v2 6/8] power: reset: add PSCR NVMEM Driver for Recording Power State Change Reasons

[kernel test robot]

Hi Oleksij,

kernel test robot noticed the following build errors:

[auto build test ERROR on robh/for-next]
[also build test ERROR on broonie-regulator/for-next rafael-pm/thermal linus/master v6.8-rc1 next-20240125]
[cannot apply to sre-power-supply/for-next]
[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/Oleksij-Rempel/power-Extend-power_on_reason-h-for-upcoming-PSCRR-framework/20240124-202833
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
patch link:    https://lore.kernel.org/r/20240124122204.730370-7-o.rempel%40pengutronix.de
patch subject: [PATCH v2 6/8] power: reset: add PSCR NVMEM Driver for Recording Power State Change Reasons
config: i386-allmodconfig (https://download.01.org/0day-ci/archive/20240128/202401281442.zKlRfljS-lkp@xxxxxxxxx/config)
compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240128/202401281442.zKlRfljS-lkp@xxxxxxxxx/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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202401281442.zKlRfljS-lkp@xxxxxxxxx/

All errors (new ones prefixed by >>):

>> drivers/power/reset/pscrr-nvmem.c:53:2: error: call to undeclared function 'kfree'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
      53 |         kfree(buf);
         |         ^
   1 error generated.


vim +/kfree +53 drivers/power/reset/pscrr-nvmem.c

    39	
    40	static int pscrr_nvmem_read(struct pscrr_device *pscrr_dev, u32 *magic)
    41	{
    42		struct pscrr_nvmem *priv = container_of(pscrr_dev, struct pscrr_nvmem,
    43							pscrr_dev);
    44		size_t len;
    45		void *buf;
    46	
    47		buf = nvmem_cell_read(priv->cell, &len);
    48		if (IS_ERR(buf))
    49			return PTR_ERR(buf);
    50	
    51		*magic = 0;
    52		memcpy(magic, buf, min(len, sizeof(*magic)));
  > 53		kfree(buf);
    54	
    55		return 0;
    56	}
    57	

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