sys_vfork         394 arch/arm64/include/asm/unistd32.h __SYSCALL(__NR_vfork, sys_vfork)
sys_vfork          34 arch/x86/um/sys_call_table_64.c #define stub_vfork sys_vfork
sys_vfork        1107 include/linux/syscalls.h asmlinkage long sys_vfork(void);