Hi Michal, [auto build test WARNING on v4.4-rc8] [cannot apply to balbi-usb/next next-20160105] [if your patch is applied to the wrong git tree, please drop us a note to help improving the system] url: https://github.com/0day-ci/linux/commits/Michal-Nazarewicz/usb-gadget-f_midi-use-flexible-array-member-for/20160105-215816 config: x86_64-randconfig-x016-01041832 (attached as .config) reproduce: # save the attached .config to linux build tree make ARCH=x86_64 All warnings (new ones prefixed by >>): drivers/usb/gadget/function/f_midi.c: In function 'f_midi_free': >> drivers/usb/gadget/function/f_midi.c:1070:6: warning: unused variable 'i' [-Wunused-variable] int i; ^ vim +/i +1070 drivers/usb/gadget/function/f_midi.c 6f1de344 Andrzej Pietrasiewicz 2014-10-16 1054 opts->id = SNDRV_DEFAULT_STR1; 6f1de344 Andrzej Pietrasiewicz 2014-10-16 1055 opts->buflen = 256; 6f1de344 Andrzej Pietrasiewicz 2014-10-16 1056 opts->qlen = 32; 6f1de344 Andrzej Pietrasiewicz 2014-10-16 1057 opts->in_ports = 1; 6f1de344 Andrzej Pietrasiewicz 2014-10-16 1058 opts->out_ports = 1; 6f1de344 Andrzej Pietrasiewicz 2014-10-16 1059 6f1de344 Andrzej Pietrasiewicz 2014-10-16 1060 config_group_init_type_name(&opts->func_inst.group, "", 6f1de344 Andrzej Pietrasiewicz 2014-10-16 1061 &midi_func_type); b85e9de9 Andrzej Pietrasiewicz 2014-10-16 1062 b85e9de9 Andrzej Pietrasiewicz 2014-10-16 1063 return &opts->func_inst; b85e9de9 Andrzej Pietrasiewicz 2014-10-16 1064 } b85e9de9 Andrzej Pietrasiewicz 2014-10-16 1065 b85e9de9 Andrzej Pietrasiewicz 2014-10-16 1066 static void f_midi_free(struct usb_function *f) b85e9de9 Andrzej Pietrasiewicz 2014-10-16 1067 { b85e9de9 Andrzej Pietrasiewicz 2014-10-16 1068 struct f_midi *midi; b85e9de9 Andrzej Pietrasiewicz 2014-10-16 1069 struct f_midi_opts *opts; b85e9de9 Andrzej Pietrasiewicz 2014-10-16 @1070 int i; b85e9de9 Andrzej Pietrasiewicz 2014-10-16 1071 b85e9de9 Andrzej Pietrasiewicz 2014-10-16 1072 midi = func_to_midi(f); b85e9de9 Andrzej Pietrasiewicz 2014-10-16 1073 opts = container_of(f->fi, struct f_midi_opts, func_inst); b85e9de9 Andrzej Pietrasiewicz 2014-10-16 1074 kfree(midi->id); 6f1de344 Andrzej Pietrasiewicz 2014-10-16 1075 mutex_lock(&opts->lock); b85e9de9 Andrzej Pietrasiewicz 2014-10-16 1076 kfree(midi); 6f1de344 Andrzej Pietrasiewicz 2014-10-16 1077 --opts->refcnt; 6f1de344 Andrzej Pietrasiewicz 2014-10-16 1078 mutex_unlock(&opts->lock); :::::: The code at line 1070 was first introduced by commit :::::: b85e9de9e818de0dcbc50b7b4242192eb6194855 usb: gadget: f_midi: convert to new function interface with backward compatibility :::::: TO: Andrzej Pietrasiewicz <andrzej.p@xxxxxxxxxxx> :::::: CC: Felipe Balbi <balbi@xxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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