Hi Roopa,
[auto build test WARNING on next-20151006 -- if it's inappropriate base, please ignore]
config: sh-titan_defconfig (attached as .config)
reproduce:
wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
make.cross ARCH=sh
Note: it may well be a FALSE warning. FWIW you are at least aware of it now.
http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings
All warnings (new ones prefixed by >>):
net/bridge/br_fdb.c: In function 'br_fdb_add':
>> net/bridge/br_fdb.c:784:13: warning: 'p' may be used uninitialized in this function [-Wuninitialized]
net/bridge/br_fdb.c:850:26: note: 'p' was declared here
net/bridge/br_fdb.c: In function 'br_fdb_delete':
net/bridge/br_fdb.c:952:11: warning: 'p' may be used uninitialized in this function [-Wuninitialized]
net/bridge/br_fdb.c:977:26: note: 'p' was declared here
vim +/p +784 net/bridge/br_fdb.c
eb8d7baa Wilson Kok 2015-05-25 768
2ba071ec Vlad Yasevich 2013-02-13 769 fdb = fdb_find(head, addr, vid);
64af1bac stephen hemminger 2011-09-30 770 if (fdb == NULL) {
64af1bac stephen hemminger 2011-09-30 771 if (!(flags & NLM_F_CREATE))
64af1bac stephen hemminger 2011-09-30 772 return -ENOENT;
36fd2b63 stephen hemminger 2011-04-04 773
2ba071ec Vlad Yasevich 2013-02-13 774 fdb = fdb_create(head, source, addr, vid);
36fd2b63 stephen hemminger 2011-04-04 775 if (!fdb)
36fd2b63 stephen hemminger 2011-04-04 776 return -ENOMEM;
b0a397fb roopa 2013-04-22 777
b0a397fb roopa 2013-04-22 778 modified = true;
64af1bac stephen hemminger 2011-09-30 779 } else {
64af1bac stephen hemminger 2011-09-30 780 if (flags & NLM_F_EXCL)
64af1bac stephen hemminger 2011-09-30 781 return -EEXIST;
b0a397fb roopa 2013-04-22 782
b0a397fb roopa 2013-04-22 783 if (fdb->dst != source) {
b0a397fb roopa 2013-04-22 @784 fdb->dst = source;
b0a397fb roopa 2013-04-22 785 modified = true;
b0a397fb roopa 2013-04-22 786 }
64af1bac stephen hemminger 2011-09-30 787 }
36fd2b63 stephen hemminger 2011-04-04 788
0e29720e Roopa Prabhu 2015-10-06 789 if (fdb_to_nud(br, fdb) != state) {
145beee8 Vlad Yasevich 2014-05-16 790 if (state & NUD_PERMANENT) {
145beee8 Vlad Yasevich 2014-05-16 791 fdb->is_local = 1;
145beee8 Vlad Yasevich 2014-05-16 792 if (!fdb->is_static) {
:::::: The code at line 784 was first introduced by commit
:::::: b0a397fb352e65e3b6501dca9662617a18862ef1 bridge: Add fdb dst check during fdb update
:::::: TO: roopa <roopa@xxxxxxxxxxxxxxxxxxx>
:::::: CC: David S. Miller <davem@xxxxxxxxxxxxx>
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