Hi Hans, [auto build test WARNING on chanwoo-extcon/extcon-next] [also build test WARNING on v4.11-rc2 next-20170310] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Hans-de-Goede/extcon-Allow-registering-a-single-notifier-for-all-cables-on-an-extcon_dev/20170319-204610 base: https://git.kernel.org/pub/scm/linux/kernel/git/chanwoo/extcon.git extcon-next config: i386-randconfig-x072-201712 (attached as .config) compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901 reproduce: # save the attached .config to linux build tree make ARCH=i386 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 >>): drivers/extcon/extcon.c: In function 'extcon_unregister_notifier': >> drivers/extcon/extcon.c:962:48: warning: 'idx' may be used uninitialized in >> this function [-Wmaybe-uninitialized] ret = raw_notifier_chain_unregister(&edev->nh[idx], nb); ^ vim +/idx +962 drivers/extcon/extcon.c 74c5d09b drivers/extcon/extcon_class.c Donggeun Kim 2012-04-20 946 struct notifier_block *nb) 74c5d09b drivers/extcon/extcon_class.c Donggeun Kim 2012-04-20 947 { 66bee35f drivers/extcon/extcon.c Hans de Goede 2015-03-21 948 unsigned long flags; 046050f6 drivers/extcon/extcon.c Chanwoo Choi 2015-05-19 949 int ret, idx; 046050f6 drivers/extcon/extcon.c Chanwoo Choi 2015-05-19 950 7eae43ae drivers/extcon/extcon.c Chanwoo Choi 2015-06-21 951 if (!edev || !nb) 7eae43ae drivers/extcon/extcon.c Chanwoo Choi 2015-06-21 952 return -EINVAL; 7eae43ae drivers/extcon/extcon.c Chanwoo Choi 2015-06-21 953 8f482488 drivers/extcon/extcon.c Hans de Goede 2017-03-17 954 if ((int)id != -1) { 046050f6 drivers/extcon/extcon.c Chanwoo Choi 2015-05-19 955 idx = find_cable_index_by_id(edev, id); a05f44c8 drivers/extcon/extcon.c Stephen Boyd 2016-06-23 956 if (idx < 0) a05f44c8 drivers/extcon/extcon.c Stephen Boyd 2016-06-23 957 return idx; 8f482488 drivers/extcon/extcon.c Hans de Goede 2017-03-17 958 } 66bee35f drivers/extcon/extcon.c Hans de Goede 2015-03-21 959 66bee35f drivers/extcon/extcon.c Hans de Goede 2015-03-21 960 spin_lock_irqsave(&edev->lock, flags); 8f482488 drivers/extcon/extcon.c Hans de Goede 2017-03-17 961 if ((int)id != -1) 046050f6 drivers/extcon/extcon.c Chanwoo Choi 2015-05-19 @962 ret = raw_notifier_chain_unregister(&edev->nh[idx], nb); 8f482488 drivers/extcon/extcon.c Hans de Goede 2017-03-17 963 else 8f482488 drivers/extcon/extcon.c Hans de Goede 2017-03-17 964 ret = raw_notifier_chain_unregister(&edev->nh_all, nb); 8f482488 drivers/extcon/extcon.c Hans de Goede 2017-03-17 965 66bee35f drivers/extcon/extcon.c Hans de Goede 2015-03-21 966 spin_unlock_irqrestore(&edev->lock, flags); 66bee35f drivers/extcon/extcon.c Hans de Goede 2015-03-21 967 66bee35f drivers/extcon/extcon.c Hans de Goede 2015-03-21 968 return ret; 74c5d09b drivers/extcon/extcon_class.c Donggeun Kim 2012-04-20 969 } 74c5d09b drivers/extcon/extcon_class.c Donggeun Kim 2012-04-20 970 EXPORT_SYMBOL_GPL(extcon_unregister_notifier); :::::: The code at line 962 was first introduced by commit :::::: 046050f6e623e442e9c71c525462ebd395dae526 extcon: Update the prototype of extcon_register_notifier() with enum extcon :::::: TO: Chanwoo Choi <[email protected]> :::::: CC: Chanwoo Choi <[email protected]> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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