Extern or forward variable declaration at include/linux/miscdevice.h, line 77 References: arch/s390/kernel/perf_cpum_cf.c, line 1321 arch/s390/kernel/perf_cpum_cf.c, line 1325 arch/s390/kernel/perf_cpum_cf.c, line 1329 arch/x86/kernel/cpu/microcode/core.c, line 681 arch/x86/kernel/cpu/microcode/core.c, line 828 drivers/block/loop.c, line 905 drivers/char/hw_random/core.c, line 289 drivers/char/hw_random/s390-trng.c, line 137 drivers/char/hw_random/s390-trng.c, line 141 drivers/hwtracing/coresight/coresight-etb10.c, line 714 drivers/hwtracing/coresight/coresight-etb10.c, line 718 drivers/hwtracing/coresight/coresight-etb10.c, line 723 drivers/hwtracing/coresight/coresight-tmc-core.c, line 356 drivers/hwtracing/coresight/coresight-tmc-core.c, line 360 drivers/hwtracing/coresight/coresight-tmc-core.c, line 365 drivers/misc/lis3lv02d/lis3lv02d.c, line 866 drivers/net/tun.c, line 2600 drivers/platform/x86/sony-laptop.c, line 4018 drivers/platform/x86/toshiba_acpi.c, line 2388 drivers/s390/crypto/pkey_api.c, line 1696 drivers/s390/crypto/pkey_api.c, line 1800 drivers/s390/crypto/pkey_api.c, line 1922 drivers/s390/crypto/pkey_api.c, line 2045 drivers/s390/crypto/pkey_api.c, line 2050 drivers/s390/crypto/zcrypt_api.c, line 295 drivers/s390/crypto/zcrypt_api.c, line 299 drivers/s390/crypto/zcrypt_card.c, line 133 drivers/s390/crypto/zcrypt_queue.c, line 99 drivers/virt/acrn/hsm.c, line 420 drivers/virt/acrn/hsm.c, line 425 drivers/watchdog/watchdog_dev.c, line 628 include/linux/miscdevice.h, line 77 include/linux/miscdevice.h, line 86