Re: [PATCH v10 3/3] ublk: enable zoned storage support

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

Hi Andreas,

kernel test robot noticed the following build errors:

[auto build test ERROR on 5d0c230f1de8c7515b6567d9afba1f196fb4e2f4]

url:    https://github.com/intel-lab-lkp/linux/commits/Andreas-Hindborg-Samsung/ublk-add-helper-to-check-if-device-supports-user-copy/20230803-224003
base:   5d0c230f1de8c7515b6567d9afba1f196fb4e2f4
patch link:    https://lore.kernel.org/r/20230803140701.18515-4-nmi%40metaspace.dk
patch subject: [PATCH v10 3/3] ublk: enable zoned storage support
config: sh-randconfig-r024-20230731 (https://download.01.org/0day-ci/archive/20230804/202308040229.pFTUh2cG-lkp@intel.com/config)
compiler: sh4-linux-gcc (GCC) 12.3.0
reproduce: (https://download.01.org/0day-ci/archive/20230804/202308040229.pFTUh2cG-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/202308040229.pFTUh2cG-lkp@intel.com/

All error/warnings (new ones prefixed by >>):

   drivers/block/ublk_drv.c: In function 'ublk_alloc_report_buffer':
>> drivers/block/ublk_drv.c:281:23: error: implicit declaration of function '__vmalloc'; did you mean '__kmalloc'? [-Werror=implicit-function-declaration]
     281 |                 buf = __vmalloc(bufsize, GFP_KERNEL | __GFP_NORETRY);
         |                       ^~~~~~~~~
         |                       __kmalloc
>> drivers/block/ublk_drv.c:281:21: warning: assignment to 'void *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
     281 |                 buf = __vmalloc(bufsize, GFP_KERNEL | __GFP_NORETRY);
         |                     ^
   cc1: some warnings being treated as errors


vim +281 drivers/block/ublk_drv.c

   264	
   265	/* Based on virtblk_alloc_report_buffer */
   266	static void *ublk_alloc_report_buffer(struct ublk_device *ublk,
   267					      unsigned int nr_zones, size_t *buflen)
   268	{
   269		struct request_queue *q = ublk->ub_disk->queue;
   270		size_t bufsize;
   271		void *buf;
   272	
   273		nr_zones = min_t(unsigned int, nr_zones,
   274				 ublk->ub_disk->nr_zones);
   275	
   276		bufsize = nr_zones * sizeof(struct blk_zone);
   277		bufsize =
   278			min_t(size_t, bufsize, queue_max_hw_sectors(q) << SECTOR_SHIFT);
   279	
   280		while (bufsize >= sizeof(struct blk_zone)) {
 > 281			buf = __vmalloc(bufsize, GFP_KERNEL | __GFP_NORETRY);
   282			if (buf) {
   283				*buflen = bufsize;
   284				return buf;
   285			}
   286			bufsize >>= 1;
   287		}
   288	
   289		*buflen = 0;
   290		return NULL;
   291	}
   292	

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