Extern or forward variable declaration arch/x86/include/asm/nmi.h, line 17 [usage...] include/linux/bpf-cgroup.h, line 21 [usage...] include/linux/filter.h, line 40 [usage...] include/linux/fs.h, line 3618 [usage...] include/linux/hugetlb.h, line 16 [usage...] include/linux/mmzone.h, line 1043 [usage...] include/linux/nmi.h, line 204 [usage...] include/linux/printk.h, line 87 [usage...] include/linux/sched/sysctl.h, line 7 [usage...] include/linux/security.h, line 73 [usage...] include/linux/sysctl.h, line 34 [usage...] include/linux/timer.h, line 200 [usage...] include/linux/vmstat.h, line 303 [usage...] include/net/ax25.h, line 228 [usage...] include/net/ndisc.h, line 72 [usage...] include/net/net_namespace.h, line 412 [usage...] Structure include/linux/sysctl.h, line 114 [usage...] Class, struct, or union member arch/s390/appldata/appldata.h, line 31 [usage...] include/linux/sysctl.h, line 136 [usage...] net/rds/tcp.c, line 482 [usage...]