[jsarha:topic/cros-sof-v4.14-rebase 2874/9999] net/ipv6/route.c:2623:5: sparse: sparse: symbol 'rt6_addrconf_purge' was not declared. Should it be static?

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

tree:   https://github.com/jsarha/linux topic/cros-sof-v4.14-rebase
head:   18a233f3f676a98dde00947535d99ab1a54da340
commit: ba363662d10c7893123176454fed878d431c895e [2874/9999] ANDROID: net: ipv6: autoconf routes into per-device tables
config: x86_64-randconfig-s022 (https://download.01.org/0day-ci/archive/20230421/202304211637.MYwfelKT-lkp@intel.com/config)
compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.4-39-gce1a6720-dirty
        # https://github.com/jsarha/linux/commit/ba363662d10c7893123176454fed878d431c895e
        git remote add jsarha https://github.com/jsarha/linux
        git fetch --no-tags jsarha topic/cros-sof-v4.14-rebase
        git checkout ba363662d10c7893123176454fed878d431c895e
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 olddefconfig
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 SHELL=/bin/bash LDFLAGS=-z max-page-size=0x200000  net/ipv6/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202304211637.MYwfelKT-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
   net/ipv6/route.c:1253:31: sparse: sparse: incorrect type in assignment (different base types) @@     expected unsigned int [usertype] flow_label @@     got restricted __be32 @@
   net/ipv6/route.c:1253:31: sparse:     expected unsigned int [usertype] flow_label
   net/ipv6/route.c:1253:31: sparse:     got restricted __be32
>> net/ipv6/route.c:2623:5: sparse: sparse: symbol 'rt6_addrconf_purge' was not declared. Should it be static?
   net/ipv6/route.c:2623:5: warning: no previous declaration for 'rt6_addrconf_purge' [-Wmissing-declarations]
    int rt6_addrconf_purge(struct rt6_info *rt, void *arg) {
        ^~~~~~~~~~~~~~~~~~
   arch/x86/include/asm/bitops.h: Assembler messages:
   arch/x86/include/asm/bitops.h:97: Warning: no instruction mnemonic suffix given and no register operands; using default for `bts'

vim +/rt6_addrconf_purge +2623 net/ipv6/route.c

  2622	
> 2623	int rt6_addrconf_purge(struct rt6_info *rt, void *arg) {
  2624		if (rt->rt6i_flags & (RTF_DEFAULT | RTF_ADDRCONF) &&
  2625		    (!rt->rt6i_idev || rt->rt6i_idev->cnf.accept_ra != 2))
  2626			return -1;
  2627		return 0;
  2628	}
  2629	

-- 
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