[jimc:dd-fix-5e 24/24] lib/dynamic_debug.c:935:5: warning: no previous prototype for '__dynamic_emit_prefix'

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

tree:   https://github.com/jimc/linux.git dd-fix-5e
head:   69b58a07013be2ff9c21e29b48cce3de6d963f11
commit: 69b58a07013be2ff9c21e29b48cce3de6d963f11 [24/24] dyndbg: use assoc-array to cache prefixes
config: x86_64-rhel-8.3 (https://download.01.org/0day-ci/archive/20230903/202309032002.ZOwLocfG-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230903/202309032002.ZOwLocfG-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/202309032002.ZOwLocfG-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> lib/dynamic_debug.c:935:5: warning: no previous prototype for '__dynamic_emit_prefix' [-Wmissing-prototypes]
     935 | int __dynamic_emit_prefix(struct _ddebug *desc, char *buf, int pos)
         |     ^~~~~~~~~~~~~~~~~~~~~


vim +/__dynamic_emit_prefix +935 lib/dynamic_debug.c

   934	
 > 935	int __dynamic_emit_prefix(struct _ddebug *desc, char *buf, int pos)
   936	{
   937		int pos_after_tid;
   938		char *prefix;
   939	        struct assoc_array_edit *edit;
   940	
   941		prefix = assoc_array_find(&ddebug_prefix_cache, &ddprefix_aa_ops, desc);
   942		if (prefix) {
   943	                pos += snprintf(buf + pos, remaining(pos), "%s:", prefix);
   944			return pos;
   945		}
   946		pos_after_tid = pos;
   947	
   948	        if (desc->flags & _DPRINTK_FLAGS_INCL_MODNAME)
   949			pos += snprintf(buf + pos, remaining(pos), "%s:",
   950					desc->modname);
   951		if (desc->flags & _DPRINTK_FLAGS_INCL_FUNCNAME)
   952			pos += snprintf(buf + pos, remaining(pos), "%s:",
   953					desc->function);
   954	
   955		prefix = kstrdup(buf + pos_after_tid, GFP_KERNEL);
   956		edit = assoc_array_insert(&ddebug_prefix_cache, &ddprefix_aa_ops, desc, prefix);
   957	
   958		v4pr_info("caching prefix: %s for %px\n", prefix, desc);
   959		desc->flags |= _DPRINTK_FLAGS_PREFIX_CACHED;
   960		assoc_array_apply_edit(edit);
   961	
   962		return pos;
   963	}
   964	

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