CC: [email protected] CC: [email protected] TO: Jakub Kicinski <[email protected]>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: cb690f5238d71f543f4ce874aa59237cf53a877c commit: 719c571970109b0d0af24745d31b202affc9365f net: make napi_disable() symmetric with enable date: 6 weeks ago :::::: branch date: 23 hours ago :::::: commit date: 6 weeks ago config: i386-randconfig-m021-20210928 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <[email protected]> Reported-by: Dan Carpenter <[email protected]> smatch warnings: net/core/dev.c:6917 napi_disable() error: uninitialized symbol 'new'. vim +/new +6917 net/core/dev.c d565b0a1a9b6ee Herbert Xu 2008-12-15 6900 3b47d30396bae4 Eric Dumazet 2014-11-06 6901 void napi_disable(struct napi_struct *n) 3b47d30396bae4 Eric Dumazet 2014-11-06 6902 { 719c571970109b Jakub Kicinski 2021-09-24 6903 unsigned long val, new; 719c571970109b Jakub Kicinski 2021-09-24 6904 3b47d30396bae4 Eric Dumazet 2014-11-06 6905 might_sleep(); 3b47d30396bae4 Eric Dumazet 2014-11-06 6906 set_bit(NAPI_STATE_DISABLE, &n->state); 3b47d30396bae4 Eric Dumazet 2014-11-06 6907 719c571970109b Jakub Kicinski 2021-09-24 6908 do { 719c571970109b Jakub Kicinski 2021-09-24 6909 val = READ_ONCE(n->state); 719c571970109b Jakub Kicinski 2021-09-24 6910 if (val & (NAPIF_STATE_SCHED | NAPIF_STATE_NPSVC)) { 719c571970109b Jakub Kicinski 2021-09-24 6911 usleep_range(20, 200); 719c571970109b Jakub Kicinski 2021-09-24 6912 continue; 719c571970109b Jakub Kicinski 2021-09-24 6913 } 719c571970109b Jakub Kicinski 2021-09-24 6914 719c571970109b Jakub Kicinski 2021-09-24 6915 new = val | NAPIF_STATE_SCHED | NAPIF_STATE_NPSVC; 719c571970109b Jakub Kicinski 2021-09-24 6916 new &= ~(NAPIF_STATE_THREADED | NAPIF_STATE_PREFER_BUSY_POLL); 719c571970109b Jakub Kicinski 2021-09-24 @6917 } while (cmpxchg(&n->state, val, new) != val); 3b47d30396bae4 Eric Dumazet 2014-11-06 6918 3b47d30396bae4 Eric Dumazet 2014-11-06 6919 hrtimer_cancel(&n->timer); 3b47d30396bae4 Eric Dumazet 2014-11-06 6920 3b47d30396bae4 Eric Dumazet 2014-11-06 6921 clear_bit(NAPI_STATE_DISABLE, &n->state); 3b47d30396bae4 Eric Dumazet 2014-11-06 6922 } 3b47d30396bae4 Eric Dumazet 2014-11-06 6923 EXPORT_SYMBOL(napi_disable); 3b47d30396bae4 Eric Dumazet 2014-11-06 6924 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/[email protected]
.config.gz
Description: application/gzip
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