System call index (CS 273 (OS), Spring 2022)

System call index

CS 273 (OS), Spring 2022

System call locations in linux-5.15.33

Note: Some system calls are defined more than once in the source code. For example, brk() is defined in two files, depending on whether or not virtual memory is supported by a CPU, and clone() (a call similar to fork() for implementing thread packages) is defined differently depending on a choice of compiler options during configuration when compiling the kernel.

`accept`	`net/socket.c:1864`
`accept4`	`net/socket.c:1858`
`access`	`fs/open.c:478`
`acct`	`kernel/acct.c:273`
`add_key`	`security/keys/keyctl.c:74`
`adjtimex`	`kernel/time/time.c:269`
`adjtimex_time32`	`kernel/time/time.c:349`
`alarm`	`kernel/time/itimer.c:306`
`arch_prctl`	`arch/x86/kernel/process_32.c:224`
`arch_prctl`	`arch/x86/kernel/process_64.c:842`
`arch_prctl`	`arch/x86/um/syscalls_32.c:5`
`arch_prctl`	`arch/x86/um/syscalls_64.c:79`
`bind`	`net/socket.c:1705`
`bpf`	`kernel/bpf/syscall.c:4716`
`brk`	`mm/mmap.c:194`
`brk`	`mm/nommu.c:381`
`capget`	`kernel/capability.c:148`
`capset`	`kernel/capability.c:222`
`chdir`	`fs/open.c:483`
`chmod`	`fs/open.c:636`
`chown`	`fs/open.c:727`
`chown16`	`kernel/uid16.c:23`
`chroot`	`fs/open.c:531`
`clock_adjtime`	`kernel/time/posix-timers.c:1112`
`clock_adjtime32`	`kernel/time/posix-timers.c:1182`
`clock_getres`	`kernel/time/posix-stubs.c:108`
`clock_getres`	`kernel/time/posix-timers.c:1129`
`clock_getres_time32`	`kernel/time/posix-stubs.c:200`
`clock_getres_time32`	`kernel/time/posix-timers.c:1200`
`clock_gettime`	`kernel/time/posix-stubs.c:93`
`clock_gettime`	`kernel/time/posix-timers.c:1082`
`clock_gettime32`	`kernel/time/posix-stubs.c:185`
`clock_gettime32`	`kernel/time/posix-timers.c:1164`
`clock_nanosleep`	`kernel/time/posix-stubs.c:127`
`clock_nanosleep`	`kernel/time/posix-timers.c:1245`
`clock_nanosleep_time32`	`kernel/time/posix-stubs.c:220`
`clock_nanosleep_time32`	`kernel/time/posix-timers.c:1272`
`clock_settime`	`kernel/time/posix-stubs.c:60`
`clock_settime`	`kernel/time/posix-timers.c:1067`
`clock_settime32`	`kernel/time/posix-stubs.c:172`
`clock_settime32`	`kernel/time/posix-timers.c:1149`
`clone`	`kernel/fork.c:2680`
`clone`	`kernel/fork.c:2685`
`clone`	`kernel/fork.c:2690`
`clone`	`kernel/fork.c:2696`
`clone3`	`kernel/fork.c:2854`
`close`	`fs/open.c:1337`
`close_range`	`fs/open.c:1362`
`connect`	`net/socket.c:1923`
`copy_file_range`	`fs/read_write.c:1532`
`creat`	`fs/open.c:1296`
`delete_module`	`kernel/module.c:912`
`dup`	`fs/file.c:1286`
`dup2`	`fs/file.c:1271`
`dup3`	`fs/file.c:1266`
`epoll_create`	`fs/eventpoll.c:2006`
`epoll_create1`	`fs/eventpoll.c:2001`
`epoll_ctl`	`fs/eventpoll.c:2176`
`epoll_pwait`	`fs/eventpoll.c:2268`
`epoll_pwait2`	`fs/eventpoll.c:2279`
`epoll_wait`	`fs/eventpoll.c:2234`
`eventfd`	`fs/eventfd.c:454`
`eventfd2`	`fs/eventfd.c:449`
`execve`	`fs/exec.c:2087`
`execveat`	`fs/exec.c:2095`
`exit`	`kernel/exit.c:889`
`exit_group`	`kernel/exit.c:931`
`faccessat`	`fs/open.c:467`
`faccessat2`	`fs/open.c:472`
`fadvise64`	`mm/fadvise.c:213`
`fadvise64_64`	`mm/fadvise.c:206`
`fallocate`	`fs/open.c:336`
`fanotify_init`	`fs/notify/fanotify/fanotify_user.c:1144`
`fanotify_mark`	`fs/notify/fanotify/fanotify_user.c:1547`
`fchdir`	`fs/open.c:509`
`fchmod`	`fs/open.c:600`
`fchmodat`	`fs/open.c:630`
`fchown`	`fs/open.c:763`
`fchown16`	`kernel/uid16.c:33`
`fchownat`	`fs/open.c:721`
`fcntl`	`fs/fcntl.c:457`
`fcntl64`	`fs/fcntl.c:481`
`fdatasync`	`fs/sync.c:235`
`fgetxattr`	`fs/xattr.c:715`
`finit_module`	`kernel/module.c:4149`
`flistxattr`	`fs/xattr.c:792`
`flock`	`fs/locks.c:2125`
`fork`	`kernel/fork.c:2651`
`fremovexattr`	`fs/xattr.c:858`
`fsconfig`	`fs/fsopen.c:314`
`fsetxattr`	`fs/xattr.c:621`
`fsmount`	`fs/namespace.c:3584`
`fsopen`	`fs/fsopen.c:115`
`fspick`	`fs/fsopen.c:158`
`fstat`	`fs/stat.c:316`
`fstat64`	`fs/stat.c:546`
`fstatat64`	`fs/stat.c:557`
`fstatfs`	`fs/statfs.c:213`
`fstatfs64`	`fs/statfs.c:222`
`fsync`	`fs/sync.c:230`
`ftruncate`	`fs/open.c:201`
`ftruncate64`	`fs/open.c:220`
`futex`	`kernel/futex.c:4022`
`futex_time32`	`kernel/futex.c:4203`
`futimesat`	`fs/utimes.c:202`
`futimesat_time32`	`fs/utimes.c:287`
`get_mempolicy`	`mm/mempolicy.c:1633`
`get_robust_list`	`kernel/futex.c:3584`
`get_thread_area`	`arch/x86/kernel/tls.c:237`
`get_thread_area`	`arch/x86/um/tls_32.c:325`
`getcpu`	`kernel/sys.c:2558`
`getcwd`	`fs/d_path.c:414`
`getdents`	`fs/readdir.c:271`
`getdents64`	`fs/readdir.c:354`
`getegid`	`kernel/sys.c:988`
`getegid16`	`kernel/uid16.c:218`
`geteuid`	`kernel/sys.c:976`
`geteuid16`	`kernel/uid16.c:208`
`getgid`	`kernel/sys.c:982`
`getgid16`	`kernel/uid16.c:213`
`getgroups`	`kernel/groups.c:148`
`getgroups16`	`kernel/uid16.c:154`
`gethostname`	`kernel/sys.c:1385`
`getitimer`	`kernel/time/itimer.c:113`
`getpeername`	`net/socket.c:1997`
`getpgid`	`kernel/sys.c:1156`
`getpgrp`	`kernel/sys.c:1163`
`getpid`	`kernel/sys.c:932`
`getppid`	`kernel/sys.c:959`
`getpriority`	`kernel/sys.c:273`
`getrandom`	`drivers/char/random.c:2008`
`getresgid`	`kernel/sys.c:810`
`getresgid16`	`kernel/uid16.c:87`
`getresuid`	`kernel/sys.c:727`
`getresuid16`	`kernel/uid16.c:64`
`getrlimit`	`kernel/sys.c:1436`
`getrusage`	`kernel/sys.c:1833`
`getsid`	`kernel/sys.c:1170`
`getsockname`	`net/socket.c:1961`
`getsockopt`	`net/socket.c:2235`
`gettid`	`kernel/sys.c:948`
`gettimeofday`	`kernel/time/time.c:140`
`getuid`	`kernel/sys.c:970`
`getuid16`	`kernel/uid16.c:203`
`getxattr`	`fs/xattr.c:703`
`ia32_fadvise64`	`arch/x86/kernel/sys_ia32.c:112`
`ia32_fadvise64_64`	`arch/x86/kernel/sys_ia32.c:87`
`ia32_fallocate`	`arch/x86/kernel/sys_ia32.c:119`
`ia32_ftruncate64`	`arch/x86/kernel/sys_ia32.c:61`
`ia32_pread64`	`arch/x86/kernel/sys_ia32.c:68`
`ia32_pwrite64`	`arch/x86/kernel/sys_ia32.c:75`
`ia32_readahead`	`arch/x86/kernel/sys_ia32.c:97`
`ia32_sync_file_range`	`arch/x86/kernel/sys_ia32.c:103`
`ia32_truncate64`	`arch/x86/kernel/sys_ia32.c:54`
`init_module`	`kernel/module.c:4129`
`inotify_add_watch`	`fs/notify/inotify/inotify_user.c:709`
`inotify_init`	`fs/notify/inotify/inotify_user.c:704`
`inotify_init1`	`fs/notify/inotify/inotify_user.c:699`
`inotify_rm_watch`	`fs/notify/inotify/inotify_user.c:773`
`io_cancel`	`fs/aio.c:2121`
`io_destroy`	`fs/aio.c:1381`
`io_getevents`	`fs/aio.c:2197`
`io_getevents_time32`	`fs/aio.c:2295`
`io_pgetevents`	`fs/aio.c:2222`
`io_pgetevents_time32`	`fs/aio.c:2257`
`io_setup`	`fs/aio.c:1312`
`io_submit`	`fs/aio.c:2027`
`io_uring_enter`	`fs/io_uring.c:9996`
`io_uring_register`	`fs/io_uring.c:10989`
`io_uring_setup`	`fs/io_uring.c:10452`
`ioctl`	`fs/ioctl.c:860`
`ioperm`	`arch/x86/kernel/ioport.c:152`
`ioperm`	`arch/x86/kernel/ioport.c:206`
`iopl`	`arch/x86/kernel/ioport.c:173`
`iopl`	`arch/x86/kernel/ioport.c:211`
`ioprio_get`	`block/ioprio.c:199`
`ioprio_set`	`block/ioprio.c:100`
`ipc`	`ipc/syscall.c:110`
`kcmp`	`kernel/kcmp.c:135`
`kexec_file_load`	`kernel/kexec_file.c:354`
`kexec_load`	`kernel/kexec.c:231`
`keyctl`	`security/keys/keyctl.c:1869`
`kill`	`kernel/signal.c:3787`
`landlock_add_rule`	`security/landlock/syscalls.c:304`
`landlock_create_ruleset`	`security/landlock/syscalls.c:156`
`landlock_restrict_self`	`security/landlock/syscalls.c:392`
`lchown`	`fs/open.c:732`
`lchown16`	`kernel/uid16.c:28`
`lgetxattr`	`fs/xattr.c:709`
`link`	`fs/namei.c:4481`
`linkat`	`fs/namei.c:4474`
`listen`	`net/socket.c:1737`
`listxattr`	`fs/xattr.c:780`
`llistxattr`	`fs/xattr.c:786`
`llseek`	`fs/read_write.c:336`
`lremovexattr`	`fs/xattr.c:852`
`lseek`	`fs/read_write.c:322`
`lsetxattr`	`fs/xattr.c:614`
`lstat`	`fs/stat.c:303`
`lstat64`	`fs/stat.c:534`
`madvise`	`mm/madvise.c:1226`
`mbind`	`mm/mempolicy.c:1474`
`membarrier`	`kernel/sched/membarrier.c:580`
`memfd_create`	`mm/memfd.c:266`
`memfd_secret`	`mm/secretmem.c:193`
`migrate_pages`	`mm/mempolicy.c:1595`
`mincore`	`mm/mincore.c:230`
`mkdir`	`fs/namei.c:3929`
`mkdirat`	`fs/namei.c:3924`
`mknod`	`fs/namei.c:3845`
`mknodat`	`fs/namei.c:3839`
`mlock`	`mm/mlock.c:694`
`mlock2`	`mm/mlock.c:699`
`mlockall`	`mm/mlock.c:775`
`mmap`	`arch/x86/kernel/sys_x86_64.c:89`
`mmap_pgoff`	`mm/mmap.c:1631`
`mmap_pgoff`	`mm/nommu.c:1304`
`modify_ldt`	`arch/x86/kernel/ldt.c:665`
`modify_ldt`	`arch/x86/um/ldt.c:373`
`mount`	`fs/namespace.c:3516`
`mount_setattr`	`fs/namespace.c:4226`
`move_mount`	`fs/namespace.c:3713`
`move_pages`	`mm/migrate.c:2042`
`mprotect`	`mm/mprotect.c:659`
`mq_getsetattr`	`ipc/mqueue.c:1485`
`mq_notify`	`ipc/mqueue.c:1429`
`mq_open`	`ipc/mqueue.c:930`
`mq_timedreceive`	`ipc/mqueue.c:1287`
`mq_timedreceive_time32`	`ipc/mqueue.c:1630`
`mq_timedsend`	`ipc/mqueue.c:1273`
`mq_timedsend_time32`	`ipc/mqueue.c:1615`
`mq_unlink`	`ipc/mqueue.c:940`
`mremap`	`mm/mremap.c:895`
`mremap`	`mm/nommu.c:1588`
`msgctl`	`ipc/msg.c:634`
`msgget`	`ipc/msg.c:314`
`msgrcv`	`ipc/msg.c:1264`
`msgsnd`	`ipc/msg.c:965`
`msync`	`mm/msync.c:32`
`munlock`	`mm/mlock.c:712`
`munlockall`	`mm/mlock.c:804`
`munmap`	`mm/mmap.c:2929`
`munmap`	`mm/nommu.c:1512`
`name_to_handle_at`	`fs/fhandle.c:93`
`nanosleep`	`kernel/time/hrtimer.c:2118`
`nanosleep_time32`	`kernel/time/hrtimer.c:2139`
`newfstat`	`fs/stat.c:419`
`newfstatat`	`fs/stat.c:406`
`newlstat`	`fs/stat.c:392`
`newstat`	`fs/stat.c:381`
`newuname`	`kernel/sys.c:1290`
`ni_syscall`	`arch/x86/entry/common.c:250`
`nice`	`kernel/sched/core.c:6958`
`old_getrlimit`	`kernel/sys.c:1501`
`old_mmap`	`mm/mmap.c:1648`
`old_mmap`	`mm/nommu.c:1321`
`old_msgctl`	`ipc/msg.c:647`
`old_readdir`	`fs/readdir.c:180`
`old_select`	`fs/select.c:829`
`old_semctl`	`ipc/sem.c:1720`
`old_shmctl`	`ipc/shm.c:1302`
`oldumount`	`fs/namespace.c:1789`
`olduname`	`kernel/sys.c:1331`
`open`	`fs/open.c:1232`
`open_by_handle_at`	`fs/fhandle.c:256`
`open_tree`	`fs/namespace.c:2454`
`openat`	`fs/open.c:1239`
`openat2`	`fs/open.c:1247`
`pause`	`kernel/signal.c:4587`
`pciconfig_read`	`drivers/pci/syscall.c:15`
`pciconfig_write`	`drivers/pci/syscall.c:86`
`perf_event_open`	`kernel/events/core.c:12077`
`personality`	`kernel/exec_domain.c:38`
`pidfd_getfd`	`kernel/pid.c:687`
`pidfd_open`	`kernel/pid.c:592`
`pidfd_send_signal`	`kernel/signal.c:3862`
`pipe`	`fs/pipe.c:1030`
`pipe2`	`fs/pipe.c:1025`
`pivot_root`	`fs/namespace.c:3816`
`pkey_alloc`	`mm/mprotect.c:673`
`pkey_free`	`mm/mprotect.c:703`
`pkey_mprotect`	`mm/mprotect.c:667`
`poll`	`fs/select.c:1067`
`ppoll`	`fs/select.c:1100`
`ppoll_time32`	`fs/select.c:1126`
`prctl`	`kernel/sys.c:2282`
`pread64`	`fs/read_write.c:682`
`preadv`	`fs/read_write.c:1047`
`preadv2`	`fs/read_write.c:1055`
`prlimit64`	`kernel/sys.c:1659`
`process_madvise`	`mm/madvise.c:1231`
`process_mrelease`	`mm/oom_kill.c:1143`
`process_vm_readv`	`mm/process_vm_access.c:291`
`process_vm_writev`	`mm/process_vm_access.c:298`
`pselect6`	`fs/select.c:794`
`pselect6_time32`	`fs/select.c:808`
`ptrace`	`kernel/ptrace.c:1294`
`pwrite64`	`fs/read_write.c:708`
`pwritev`	`fs/read_write.c:1067`
`pwritev2`	`fs/read_write.c:1075`
`quotactl`	`fs/quota/quota.c:915`
`quotactl_fd`	`fs/quota/quota.c:971`
`read`	`fs/read_write.c:631`
`readahead`	`mm/readahead.c:639`
`readlink`	`fs/stat.c:473`
`readlinkat`	`fs/stat.c:467`
`readv`	`fs/read_write.c:1035`
`reboot`	`kernel/reboot.c:311`
`recv`	`net/socket.c:2121`
`recvfrom`	`net/socket.c:2110`
`recvmmsg`	`net/socket.c:2862`
`recvmmsg_time32`	`net/socket.c:2873`
`recvmsg`	`net/socket.c:2710`
`remap_file_pages`	`mm/mmap.c:2940`
`removexattr`	`fs/xattr.c:846`
`rename`	`fs/namei.c:4823`
`renameat`	`fs/namei.c:4816`
`renameat2`	`fs/namei.c:4809`
`request_key`	`security/keys/keyctl.c:167`
`restart_syscall`	`kernel/signal.c:3017`
`rmdir`	`fs/namei.c:4048`
`rseq`	`kernel/rseq.c:328`
`rt_sigaction`	`kernel/signal.c:4394`
`rt_sigpending`	`kernel/signal.c:3232`
`rt_sigprocmask`	`kernel/signal.c:3160`
`rt_sigqueueinfo`	`kernel/signal.c:4012`
`rt_sigreturn`	`arch/x86/kernel/signal.c:657`
`rt_sigsuspend`	`kernel/signal.c:4617`
`rt_sigtimedwait`	`kernel/signal.c:3643`
`rt_sigtimedwait_time32`	`kernel/signal.c:3676`
`rt_tgsigqueueinfo`	`kernel/signal.c:4052`
`sched_get_priority_max`	`kernel/sched/core.c:8410`
`sched_get_priority_min`	`kernel/sched/core.c:8437`
`sched_getaffinity`	`kernel/sched/core.c:8102`
`sched_getattr`	`kernel/sched/core.c:7875`
`sched_getparam`	`kernel/sched/core.c:7794`
`sched_getscheduler`	`kernel/sched/core.c:7765`
`sched_rr_get_interval`	`kernel/sched/core.c:8502`
`sched_rr_get_interval_time32`	`kernel/sched/core.c:8515`
`sched_setaffinity`	`kernel/sched/core.c:8050`
`sched_setattr`	`kernel/sched/core.c:7722`
`sched_setparam`	`kernel/sched/core.c:7711`
`sched_setscheduler`	`kernel/sched/core.c:7696`
`sched_yield`	`kernel/sched/core.c:8155`
`seccomp`	`kernel/seccomp.c:1970`
`select`	`fs/select.c:725`
`semctl`	`ipc/sem.c:1707`
`semget`	`ipc/sem.c:624`
`semop`	`ipc/sem.c:2300`
`semtimedop`	`ipc/sem.c:2272`
`semtimedop_time32`	`ipc/sem.c:2292`
`send`	`net/socket.c:2058`
`sendfile`	`fs/read_write.c:1281`
`sendfile64`	`fs/read_write.c:1300`
`sendmmsg`	`net/socket.c:2578`
`sendmsg`	`net/socket.c:2502`
`sendto`	`net/socket.c:2047`
`set_mempolicy`	`mm/mempolicy.c:1501`
`set_robust_list`	`kernel/futex.c:3562`
`set_thread_area`	`arch/x86/kernel/tls.c:185`
`set_thread_area`	`arch/x86/um/tls_32.c:277`
`set_tid_address`	`kernel/fork.c:1721`
`setdomainname`	`kernel/sys.c:1411`
`setfsgid`	`kernel/sys.c:917`
`setfsgid16`	`kernel/uid16.c:109`
`setfsuid`	`kernel/sys.c:873`
`setfsuid16`	`kernel/uid16.c:104`
`setgid`	`kernel/sys.c:459`
`setgid16`	`kernel/uid16.c:43`
`setgroups`	`kernel/groups.c:185`
`setgroups16`	`kernel/uid16.c:177`
`sethostname`	`kernel/sys.c:1358`
`setitimer`	`kernel/time/itimer.c:332`
`setns`	`kernel/nsproxy.c:527`
`setpgid`	`kernel/sys.c:1057`
`setpriority`	`kernel/sys.c:203`
`setregid`	`kernel/sys.c:413`
`setregid16`	`kernel/uid16.c:38`
`setresgid`	`kernel/sys.c:805`
`setresgid16`	`kernel/uid16.c:81`
`setresuid`	`kernel/sys.c:722`
`setresuid16`	`kernel/uid16.c:58`
`setreuid`	`kernel/sys.c:579`
`setreuid16`	`kernel/uid16.c:48`
`setrlimit`	`kernel/sys.c:1706`
`setsid`	`kernel/sys.c:1242`
`setsockopt`	`net/socket.c:2187`
`settimeofday`	`kernel/time/time.c:199`
`setuid`	`kernel/sys.c:642`
`setuid16`	`kernel/uid16.c:53`
`setxattr`	`fs/xattr.c:607`
`sgetmask`	`kernel/signal.c:4548`
`shmat`	`ipc/shm.c:1686`
`shmctl`	`ipc/shm.c:1289`
`shmdt`	`ipc/shm.c:1828`
`shmget`	`ipc/shm.c:840`
`shutdown`	`net/socket.c:2269`
`sigaction`	`kernel/signal.c:4466`
`sigaltstack`	`kernel/signal.c:4211`
`signal`	`kernel/signal.c:4570`
`signalfd`	`fs/signalfd.c:313`
`signalfd4`	`fs/signalfd.c:301`
`sigpending`	`kernel/signal.c:4307`
`sigprocmask`	`kernel/signal.c:4346`
`sigreturn`	`arch/x86/kernel/signal.c:626`
`sigsuspend`	`kernel/signal.c:4646`
`sigsuspend`	`kernel/signal.c:4654`
`socket`	`net/socket.c:1567`
`socketcall`	`net/socket.c:2904`
`socketpair`	`net/socket.c:1668`
`splice`	`fs/splice.c:1332`
`ssetmask`	`kernel/signal.c:4554`
`stat`	`fs/stat.c:290`
`stat64`	`fs/stat.c:522`
`statfs`	`fs/statfs.c:192`
`statfs64`	`fs/statfs.c:201`
`statx`	`fs/stat.c:634`
`stime`	`kernel/time/time.c:81`
`stime32`	`kernel/time/time.c:119`
`swapoff`	`mm/swapfile.c:2518`
`swapon`	`mm/swapfile.c:3127`
`symlink`	`fs/namei.c:4299`
`symlinkat`	`fs/namei.c:4293`
`sync`	`fs/sync.c:123`
`sync_file_range`	`fs/sync.c:382`
`sync_file_range2`	`fs/sync.c:390`
`syncfs`	`fs/sync.c:161`
`sysfs`	`fs/filesystems.c:191`
`sysinfo`	`kernel/sys.c:2638`
`syslog`	`kernel/printk/printk.c:1747`
`tee`	`fs/splice.c:1698`
`tgkill`	`kernel/signal.c:3968`
`time`	`kernel/time/time.c:62`
`time32`	`kernel/time/time.c:105`
`timer_create`	`kernel/time/posix-timers.c:577`
`timer_delete`	`kernel/time/posix-timers.c:1004`
`timer_getoverrun`	`kernel/time/posix-timers.c:777`
`timer_gettime`	`kernel/time/posix-timers.c:738`
`timer_gettime32`	`kernel/time/posix-timers.c:753`
`timer_settime`	`kernel/time/posix-timers.c:938`
`timer_settime32`	`kernel/time/posix-timers.c:961`
`timerfd_create`	`fs/timerfd.c:406`
`timerfd_gettime`	`fs/timerfd.c:576`
`timerfd_gettime32`	`fs/timerfd.c:603`
`timerfd_settime`	`fs/timerfd.c:558`
`timerfd_settime32`	`fs/timerfd.c:586`
`times`	`kernel/sys.c:1007`
`tkill`	`kernel/signal.c:3984`
`truncate`	`fs/open.c:143`
`truncate64`	`fs/open.c:215`
`umask`	`kernel/sys.c:1859`
`umount`	`fs/namespace.c:1779`
`uname`	`kernel/sys.c:1311`
`unlink`	`fs/namei.c:4215`
`unlinkat`	`fs/namei.c:4205`
`unshare`	`kernel/fork.c:3160`
`uselib`	`fs/exec.c:122`
`userfaultfd`	`fs/userfaultfd.c:2062`
`ustat`	`fs/statfs.c:248`
`utime`	`fs/utimes.c:214`
`utime32`	`fs/utimes.c:235`
`utimensat`	`fs/utimes.c:147`
`utimensat_time32`	`fs/utimes.c:251`
`utimes`	`fs/utimes.c:208`
`utimes_time32`	`fs/utimes.c:294`
`vfork`	`kernel/fork.c:2667`
`vhangup`	`fs/open.c:1372`
`vm86`	`arch/x86/kernel/vm86_32.c:178`
`vm86old`	`arch/x86/kernel/vm86_32.c:172`
`vmsplice`	`fs/splice.c:1296`
`wait4`	`kernel/exit.c:1701`
`waitid`	`kernel/exit.c:1609`
`waitpid`	`kernel/exit.c:1720`
`write`	`fs/read_write.c:656`
`writev`	`fs/read_write.c:1041`