[PATCH 1/2] block: track per-node I/O latency

[kernel test robot]

Hi Hannes,

kernel test robot noticed the following build errors:

[auto build test ERROR on axboe-block/for-next]
[also build test ERROR on linus/master v6.9-rc2 next-20240404]
[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/Hannes-Reinecke/block-track-per-node-I-O-latency/20240403-222254
base:   https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-next
patch link:    https://lore.kernel.org/r/20240403141756.88233-2-hare%40kernel.org
patch subject: [PATCH 1/2] block: track per-node I/O latency
config: x86_64-rhel-8.3 (https://download.01.org/0day-ci/archive/20240405/202404050222.vYNG4y3i-lkp@intel.com/config)
compiler: gcc-13 (Ubuntu 13.2.0-4ubuntu3) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240405/202404050222.vYNG4y3i-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 at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202404050222.vYNG4y3i-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from drivers/block/loop.c:36:
   include/linux/blk-mq.h:1242:5: warning: no previous prototype for 'blk_nlat_latency' [-Wmissing-prototypes]
    1242 | u64 blk_nlat_latency(struct gendisk *disk, int node) { return 0; }
         |     ^~~~~~~~~~~~~~~~
>> include/linux/blk-mq.h:1243:15: error: unknown type name 'in'
    1243 | static inline in blk_nlat_init(struct gendisk *disk) { return -ENOTSUPP; }
         |               ^~


vim +/in +1243 include/linux/blk-mq.h

  1233	
  1234	#ifdef CONFIG_BLK_NODE_LATENCY
  1235	int blk_nlat_enable(struct gendisk *disk);
  1236	void blk_nlat_disable(struct gendisk *disk);
  1237	u64 blk_nlat_latency(struct gendisk *disk, int node);
  1238	int blk_nlat_init(struct gendisk *disk);
  1239	#else
  1240	static inline int blk_nlat_enable(struct gendisk *disk) { return 0; }
  1241	static inline void blk_nlat_disable(struct gendisk *disk) {}
  1242	u64 blk_nlat_latency(struct gendisk *disk, int node) { return 0; }
> 1243	static inline in blk_nlat_init(struct gendisk *disk) { return -ENOTSUPP; }

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https://github.com/intel/lkp-tests/wiki