kernel/bpf/btf.c:6357:1: warning: There is an unknown macro here somewhere. Configuration is required. If BTF_ID_LIST_GLOBAL is a macro then please configure it. [unknownMacro]

Thursday, 31 March 2022


CC: kbuild-all(a)lists.01.org
BCC: lkp(a)intel.com
CC: linux-kernel(a)vger.kernel.org
TO: Song Liu <songliubraving(a)fb.com&gt;
CC: Alexei Starovoitov <ast(a)kernel.org&gt;

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   e729dbe8ea1c6145ae7b9efd6a00a5613746d3b0
commit: d19ddb476a539fd78ad1028ae13bb38506286931 bpf: Introduce btf_tracing_ids
date:   5 months ago
:::::: branch date: 2 hours ago
:::::: commit date: 5 months ago
compiler: or1k-linux-gcc (GCC) 11.2.0

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com&gt;


cppcheck warnings: (new ones prefixed by >>)
...
> net/core/rtnetlink.c:5220:9: warning: Local variable
'err' shadows outer variable [shadowVariable]        int err;
           ^
   net/core/rtnetlink.c:5120:6: note: Shadowed declaration
    int err;
        ^
   net/core/rtnetlink.c:5220:9: note: Shadow variable
       int err;
           ^

cppcheck possible warnings: (new ones prefixed by >>, may not real problems)

...
> net/core/rtnetlink.c:4846:6: warning: Redundant initialization
for 'err'. The initialized value is overwritten before it is read.
[redundantInitialization]     err = dev->netdev_ops->ndo_bridge_getlink(skb,
0, 0, dev, 0, 0);
        ^
   net/core/rtnetlink.c:4835:10: note: err is initialized
    int err = -EOPNOTSUPP;
            ^
   net/core/rtnetlink.c:4846:6: note: err is overwritten
    err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
        ^
...
> net/core/rtnetlink.c:2238:52: warning: Parameter 'tb' can
be declared with const [constParameter]    static int
rtnl_ensure_unique_netns(struct nlattr *tb[],
                                                      ^
--
...
> kernel/bpf/btf.c:6357:1: warning: There is an unknown macro here
somewhere. Configuration is required. If BTF_ID_LIST_GLOBAL is a macro then please
configure it. [unknownMacro]    BTF_ID_LIST_GLOBAL(btf_tracing_ids,
MAX_BTF_TRACING_TYPE)
   ^
--
...
> net/core/dev.c:1651:2: warning: There is an unknown macro here
somewhere. Configuration is required. If netdev_for_each_lower_dev is a macro then please
configure it. [unknownMacro]     netdev_for_each_lower_dev(dev, lower_dev, iter)
    ^

vim +6357 kernel/bpf/btf.c

eb529c5b10b940 Daniel Xu               2021-08-25  6356  
d19ddb476a539f Song Liu                2021-11-12 @6357 
BTF_ID_LIST_GLOBAL(btf_tracing_ids, MAX_BTF_TRACING_TYPE)
d19ddb476a539f Song Liu                2021-11-12  6358  #define BTF_TRACING_TYPE(name,
type) BTF_ID(struct, type)
d19ddb476a539f Song Liu                2021-11-12  6359  BTF_TRACING_TYPE_xxx
d19ddb476a539f Song Liu                2021-11-12  6360  #undef BTF_TRACING_TYPE
14f267d95fe4b0 Kumar Kartikeya Dwivedi 2021-10-02  6361  

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp

2022

2021

2020

2019