tree: https://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb.git testing/next head: ad7b607f82731eec3ed17d9d22764eb6f09609f9 commit: ad7b607f82731eec3ed17d9d22764eb6f09609f9 [50/50] usb: dwc3: trace: add missing break statement to make compiler happy config: i386-randconfig-x006-12051027 (attached as .config) compiler: gcc-7 (Debian 7.3.0-1) 7.3.0 reproduce: git checkout ad7b607f82731eec3ed17d9d22764eb6f09609f9 # 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 >>): In file included from include/trace/define_trace.h:96:0, from drivers/usb/dwc3/trace.h:342, from drivers/usb/dwc3/trace.c:11: drivers/usb/dwc3/./trace.h: In function 'trace_raw_output_dwc3_log_trb': >> include/trace/trace_events.h:360:2: warning: 's' may be used uninitialized >> in this function [-Wmaybe-uninitialized] trace_seq_printf(s, print); \ ^~~~~~~~~~~~~~~~ drivers/usb/dwc3/./trace.h:241:11: note: 's' was declared here ({char *s; ^ include/trace/trace_events.h:360:22: note: in definition of macro 'DECLARE_EVENT_CLASS' trace_seq_printf(s, print); \ ^~~~~ >> drivers/usb/dwc3/./trace.h:239:2: note: in expansion of macro 'TP_printk' TP_printk("%s: trb %p buf %08x%08x size %s%d ctrl %08x (%c%c%c%c:%c%c:%s)", ^~~~~~~~~ -- In file included from include/trace/define_trace.h:96:0, from drivers/usb//dwc3/trace.h:342, from drivers/usb//dwc3/trace.c:11: drivers/usb//dwc3/./trace.h: In function 'trace_raw_output_dwc3_log_trb': >> include/trace/trace_events.h:360:2: warning: 's' may be used uninitialized >> in this function [-Wmaybe-uninitialized] trace_seq_printf(s, print); \ ^~~~~~~~~~~~~~~~ drivers/usb//dwc3/./trace.h:241:11: note: 's' was declared here ({char *s; ^ include/trace/trace_events.h:360:22: note: in definition of macro 'DECLARE_EVENT_CLASS' trace_seq_printf(s, print); \ ^~~~~ drivers/usb//dwc3/./trace.h:239:2: note: in expansion of macro 'TP_printk' TP_printk("%s: trb %p buf %08x%08x size %s%d ctrl %08x (%c%c%c%c:%c%c:%s)", ^~~~~~~~~ vim +/TP_printk +239 drivers/usb/dwc3/./trace.h 2c4cbe6e5a Felipe Balbi 2014-04-30 215 2c4cbe6e5a Felipe Balbi 2014-04-30 216 DECLARE_EVENT_CLASS(dwc3_log_trb, 2c4cbe6e5a Felipe Balbi 2014-04-30 217 TP_PROTO(struct dwc3_ep *dep, struct dwc3_trb *trb), 2c4cbe6e5a Felipe Balbi 2014-04-30 218 TP_ARGS(dep, trb), 2c4cbe6e5a Felipe Balbi 2014-04-30 219 TP_STRUCT__entry( e42f09b85f Felipe Balbi 2017-04-28 220 __string(name, dep->name) 2c4cbe6e5a Felipe Balbi 2014-04-30 221 __field(struct dwc3_trb *, trb) 68d34c8a74 Felipe Balbi 2016-05-30 222 __field(u32, allocated) 68d34c8a74 Felipe Balbi 2016-05-30 223 __field(u32, queued) 4ac4fc9322 Felipe Balbi 2014-09-17 224 __field(u32, bpl) 4ac4fc9322 Felipe Balbi 2014-09-17 225 __field(u32, bph) 4ac4fc9322 Felipe Balbi 2014-09-17 226 __field(u32, size) 4ac4fc9322 Felipe Balbi 2014-09-17 227 __field(u32, ctrl) fa8d965d73 Felipe Balbi 2016-09-28 228 __field(u32, type) 2c4cbe6e5a Felipe Balbi 2014-04-30 229 ), 2c4cbe6e5a Felipe Balbi 2014-04-30 230 TP_fast_assign( e42f09b85f Felipe Balbi 2017-04-28 231 __assign_str(name, dep->name); 2c4cbe6e5a Felipe Balbi 2014-04-30 232 __entry->trb = trb; 4ac4fc9322 Felipe Balbi 2014-09-17 233 __entry->bpl = trb->bpl; 4ac4fc9322 Felipe Balbi 2014-09-17 234 __entry->bph = trb->bph; 4ac4fc9322 Felipe Balbi 2014-09-17 235 __entry->size = trb->size; 4ac4fc9322 Felipe Balbi 2014-09-17 236 __entry->ctrl = trb->ctrl; fa8d965d73 Felipe Balbi 2016-09-28 237 __entry->type = usb_endpoint_type(dep->endpoint.desc); 2c4cbe6e5a Felipe Balbi 2014-04-30 238 ), 0bd0f6d201 Felipe Balbi 2018-03-26 @239 TP_printk("%s: trb %p buf %08x%08x size %s%d ctrl %08x (%c%c%c%c:%c%c:%s)", 0bd0f6d201 Felipe Balbi 2018-03-26 240 __get_str(name), __entry->trb, __entry->bph, __entry->bpl, fa8d965d73 Felipe Balbi 2016-09-28 @241 ({char *s; fa8d965d73 Felipe Balbi 2016-09-28 242 int pcm = ((__entry->size >> 24) & 3) + 1; fa8d965d73 Felipe Balbi 2016-09-28 243 switch (__entry->type) { fa8d965d73 Felipe Balbi 2016-09-28 244 case USB_ENDPOINT_XFER_INT: fa8d965d73 Felipe Balbi 2016-09-28 245 case USB_ENDPOINT_XFER_ISOC: fa8d965d73 Felipe Balbi 2016-09-28 246 switch (pcm) { fa8d965d73 Felipe Balbi 2016-09-28 247 case 1: fa8d965d73 Felipe Balbi 2016-09-28 248 s = "1x "; fa8d965d73 Felipe Balbi 2016-09-28 249 break; fa8d965d73 Felipe Balbi 2016-09-28 250 case 2: fa8d965d73 Felipe Balbi 2016-09-28 251 s = "2x "; fa8d965d73 Felipe Balbi 2016-09-28 252 break; fa8d965d73 Felipe Balbi 2016-09-28 253 case 3: fa8d965d73 Felipe Balbi 2016-09-28 254 s = "3x "; fa8d965d73 Felipe Balbi 2016-09-28 255 break; fa8d965d73 Felipe Balbi 2016-09-28 256 } ad7b607f82 Andy Shevchenko 2018-12-03 257 break; fa8d965d73 Felipe Balbi 2016-09-28 258 default: fa8d965d73 Felipe Balbi 2016-09-28 259 s = ""; fa8d965d73 Felipe Balbi 2016-09-28 260 } s; }), fa8d965d73 Felipe Balbi 2016-09-28 261 DWC3_TRB_SIZE_LENGTH(__entry->size), __entry->ctrl, 22f2c619a1 Janusz Dziedzic 2016-05-20 262 __entry->ctrl & DWC3_TRB_CTRL_HWO ? 'H' : 'h', 22f2c619a1 Janusz Dziedzic 2016-05-20 263 __entry->ctrl & DWC3_TRB_CTRL_LST ? 'L' : 'l', 22f2c619a1 Janusz Dziedzic 2016-05-20 264 __entry->ctrl & DWC3_TRB_CTRL_CHN ? 'C' : 'c', 22f2c619a1 Janusz Dziedzic 2016-05-20 265 __entry->ctrl & DWC3_TRB_CTRL_CSP ? 'S' : 's', 22f2c619a1 Janusz Dziedzic 2016-05-20 266 __entry->ctrl & DWC3_TRB_CTRL_ISP_IMI ? 'S' : 's', 22f2c619a1 Janusz Dziedzic 2016-05-20 267 __entry->ctrl & DWC3_TRB_CTRL_IOC ? 'C' : 'c', b5c7ed5cca Felipe Balbi 2017-03-31 268 dwc3_trb_type_string(DWC3_TRBCTL_TYPE(__entry->ctrl)) 2c4cbe6e5a Felipe Balbi 2014-04-30 269 ) 2c4cbe6e5a Felipe Balbi 2014-04-30 270 ); 2c4cbe6e5a Felipe Balbi 2014-04-30 271 :::::: The code at line 239 was first introduced by commit :::::: 0bd0f6d201ebdc1ae07e334ea33e0b8433573628 usb: dwc3: gadget: remove allocated/queued request tracking :::::: TO: Felipe Balbi <felipe.ba...@linux.intel.com> :::::: CC: Felipe Balbi <felipe.ba...@linux.intel.com> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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