sys_getsid 308 arch/arm64/include/asm/unistd32.h __SYSCALL(__NR_getsid, sys_getsid) sys_getsid 717 include/linux/syscalls.h asmlinkage long sys_getsid(pid_t pid); sys_getsid 479 include/uapi/asm-generic/unistd.h __SYSCALL(__NR_getsid, sys_getsid) sys_getsid 479 tools/include/uapi/asm-generic/unistd.h __SYSCALL(__NR_getsid, sys_getsid)