drivers/power/reset/nvmem-reboot-mode.c:27:42: error: passing argument 2 of 'nvmem_cell_write' from incompatible pointer type

[kbuild test robot]

Hi Han,

FYI, the error/warning still remains.

tree:   https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   3120b9a6a3f7487f96af7bd634ec49c87ef712ab
commit: 7a78a7f7695bf9ef9cef3c06fbc5fa4573fd0eef power: reset: nvmem-reboot-mode: use NVMEM as reboot mode write interface
date:   3 months ago
config: i386-randconfig-e003-201936 (attached as .config)
compiler: gcc-7 (Debian 7.4.0-11) 7.4.0
reproduce:
        git checkout 7a78a7f7695bf9ef9cef3c06fbc5fa4573fd0eef
        # save the attached .config to linux build tree
        make ARCH=i386 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@xxxxxxxxx>

All errors (new ones prefixed by >>):

   drivers/power/reset/nvmem-reboot-mode.c: In function 'nvmem_reboot_mode_write':
>> drivers/power/reset/nvmem-reboot-mode.c:27:42: error: passing argument 2 of 'nvmem_cell_write' from incompatible pointer type [-Werror=incompatible-pointer-types]
     ret = nvmem_cell_write(nvmem_rbm->cell, &magic, sizeof(magic));
                                             ^
   In file included from drivers/power/reset/nvmem-reboot-mode.c:10:0:
   include/linux/nvmem-consumer.h:120:19: note: expected 'const char *' but argument is of type 'unsigned int *'
    static inline int nvmem_cell_write(struct nvmem_cell *cell,
                      ^~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors

vim +/nvmem_cell_write +27 drivers/power/reset/nvmem-reboot-mode.c

    18	
    19	static int nvmem_reboot_mode_write(struct reboot_mode_driver *reboot,
    20					    unsigned int magic)
    21	{
    22		int ret;
    23		struct nvmem_reboot_mode *nvmem_rbm;
    24	
    25		nvmem_rbm = container_of(reboot, struct nvmem_reboot_mode, reboot);
    26	
  > 27		ret = nvmem_cell_write(nvmem_rbm->cell, &magic, sizeof(magic));
    28		if (ret < 0)
    29			dev_err(reboot->dev, "update reboot mode bits failed\n");
    30	
    31		return ret;
    32	}
    33	

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