Extern or forward variable declaration at sound/usb/quirks.h, line 6 References: sound/usb/card.c, line 913 sound/usb/card.c, line 1031 sound/usb/endpoint.c, line 121 sound/usb/endpoint.c, line 126 sound/usb/endpoint.c, line 139 sound/usb/endpoint.c, line 151 sound/usb/endpoint.c, line 172 sound/usb/endpoint.c, line 194 sound/usb/endpoint.c, line 205 sound/usb/endpoint.c, line 215 sound/usb/endpoint.c, line 221 sound/usb/endpoint.c, line 222 sound/usb/endpoint.c, line 225 sound/usb/endpoint.c, line 229 sound/usb/endpoint.c, line 248 sound/usb/endpoint.c, line 289 sound/usb/endpoint.c, line 338 sound/usb/endpoint.c, line 367 sound/usb/endpoint.c, line 377 sound/usb/endpoint.c, line 388 sound/usb/endpoint.c, line 413 sound/usb/endpoint.c, line 463 sound/usb/endpoint.c, line 544 sound/usb/endpoint.c, line 547 sound/usb/endpoint.c, line 580 sound/usb/endpoint.c, line 613 sound/usb/endpoint.c, line 636 sound/usb/endpoint.c, line 657 sound/usb/endpoint.c, line 681 sound/usb/endpoint.c, line 687 sound/usb/endpoint.c, line 771 sound/usb/endpoint.c, line 772 sound/usb/endpoint.c, line 783 sound/usb/endpoint.c, line 796 sound/usb/endpoint.c, line 822 sound/usb/endpoint.c, line 843 sound/usb/endpoint.c, line 853 sound/usb/endpoint.c, line 885 sound/usb/endpoint.c, line 896 sound/usb/endpoint.c, line 925 sound/usb/endpoint.c, line 953 sound/usb/endpoint.c, line 1149 sound/usb/endpoint.c, line 1198 sound/usb/endpoint.c, line 1265 sound/usb/endpoint.c, line 1356 sound/usb/endpoint.c, line 1448 sound/usb/endpoint.c, line 1475 sound/usb/endpoint.c, line 1488 sound/usb/endpoint.c, line 1508 sound/usb/endpoint.c, line 1509 sound/usb/pcm.c, line 851 sound/usb/pcm.c, line 856 sound/usb/pcm.c, line 883 sound/usb/pcm.c, line 898 sound/usb/pcm.c, line 914 sound/usb/pcm.c, line 931 sound/usb/pcm.c, line 1327 sound/usb/quirks.c, line 1534