[hch-misc:sysfs-seq 11/13] block/mq-deadline.c:813:2: error: implicit declaration of function 'seq_printf'; did you mean 'scnprintf'?

[hch-misc:sysfs-seq 11/13] block/mq-deadline.c:813:2: error: implicit declaration of function 'seq_printf'; did you mean 'scnprintf'?

[kernel test robot]

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tree:   git://git.infradead.org/users/hch/misc.git sysfs-seq
head:   f56471a295c5c63a0a900d5a4211a74368068f3b
commit: 0e69e423b09a17f0f104216f7936e8d7f163f75a [11/13] block: convert the elevator_queue attrs to use ->seq_show
config: um-x86_64_defconfig (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        git remote add hch-misc git://git.infradead.org/users/hch/misc.git
        git fetch --no-tags hch-misc sysfs-seq
        git checkout 0e69e423b09a17f0f104216f7936e8d7f163f75a
        # save the attached .config to linux build tree
        make W=1 ARCH=um SUBARCH=x86_64

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   block/mq-deadline.c: In function 'deadline_read_expire_show':
>> block/mq-deadline.c:813:2: error: implicit declaration of function 'seq_printf'; did you mean 'scnprintf'? [-Werror=implicit-function-declaration]
     813 |  seq_printf(sf, "%d\n", __VAR);     \
         |  ^~~~~~~~~~
   block/mq-deadline.c:815:37: note: in expansion of macro 'SHOW_INT'
     815 | #define SHOW_JIFFIES(__FUNC, __VAR) SHOW_INT(__FUNC, jiffies_to_msecs(__VAR))
         |                                     ^~~~~~~~
   block/mq-deadline.c:816:1: note: in expansion of macro 'SHOW_JIFFIES'
     816 | SHOW_JIFFIES(deadline_read_expire_show, dd->fifo_expire[DD_READ]);
         | ^~~~~~~~~~~~
   At top level:
   block/mq-deadline.c:274:12: warning: 'dd_queued' defined but not used [-Wunused-function]
     274 | static u32 dd_queued(struct deadline_data *dd, enum dd_prio prio)
         |            ^~~~~~~~~
   cc1: some warnings being treated as errors
--
   block/kyber-iosched.c: In function 'kyber_read_lat_show':
>> block/kyber-iosched.c:865:2: error: implicit declaration of function 'seq_printf'; did you mean 'scnprintf'? [-Werror=implicit-function-declaration]
     865 |  seq_printf(sf, "%llu\n", kqd->latency_targets[domain]);  \
         |  ^~~~~~~~~~
   block/kyber-iosched.c:883:1: note: in expansion of macro 'KYBER_LAT_SHOW_STORE'
     883 | KYBER_LAT_SHOW_STORE(KYBER_READ, read);
         | ^~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +813 block/mq-deadline.c

   804	
   805	/*
   806	 * sysfs parts below
   807	 */
   808	#define SHOW_INT(__FUNC, __VAR)						\
   809	static void __FUNC(struct elevator_queue *e, struct seq_file *sf)	\
   810	{									\
   811		struct deadline_data *dd = e->elevator_data;			\
   812										\
 > 813		seq_printf(sf, "%d\n", __VAR);					\
   814	}
   815	#define SHOW_JIFFIES(__FUNC, __VAR) SHOW_INT(__FUNC, jiffies_to_msecs(__VAR))
   816	SHOW_JIFFIES(deadline_read_expire_show, dd->fifo_expire[DD_READ]);
   817	SHOW_JIFFIES(deadline_write_expire_show, dd->fifo_expire[DD_WRITE]);
   818	SHOW_INT(deadline_writes_starved_show, dd->writes_starved);
   819	SHOW_INT(deadline_front_merges_show, dd->front_merges);
   820	SHOW_INT(deadline_async_depth_show, dd->front_merges);
   821	SHOW_INT(deadline_fifo_batch_show, dd->fifo_batch);
   822	#undef SHOW_INT
   823	#undef SHOW_JIFFIES
   824	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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