Extern or forward variable declaration arch/x86/include/asm/nmi.h, line 17 [usage...] include/linux/fs.h, line 2735 [usage...] include/linux/hugetlb.h, line 12 [usage...] include/linux/mmzone.h, line 922 [usage...] include/linux/nmi.h, line 61 [usage...] include/linux/security.h, line 67 [usage...] include/linux/sysctl.h, line 31 [usage...] include/linux/writeback.h, line 150 [usage...] include/net/ax25.h, line 212 [usage...] include/net/ndisc.h, line 56 [usage...] include/net/net_namespace.h, line 325 [usage...] Structure include/linux/sysctl.h, line 105 [usage...] Class, struct, or union member arch/s390/appldata/appldata.h, line 30 [usage...] include/linux/sysctl.h, line 129 [usage...] include/net/netns/conntrack.h, line 17 [usage...] include/net/netns/conntrack.h, line 63 [usage...]