Update spawn's comment

Author: mohanson

src/high_level.rs

@@ -683,6 +683,8 @@ pub fn exec_cell(
 
 /// Spawn a cell in cell dep.
 ///
+/// Return the process id or a syscall error
+///
 /// # Arguments
 ///
 /// * `code_hash` - the code hash to search cell in cell deps.

src/syscalls/native.rs

@@ -544,14 +544,13 @@ pub use crate::syscalls::internal::SpawnArgs;
 /// The parent process calls the Spawn system call, which creates a new process (a child process) that is an
 /// independent ckb-vm instance. It's important to note that the parent process will not be blocked by the child
 /// process as a result of this syscall.
-/// Note: available after ckb 2nd hardfork.
 ///
 /// # Arguments
 ///
 /// * `index`, `source`, `bounds` and `place` - same as exec.
 /// * `spgs` - spawn arguments.
 ///
-/// Returns success or a syscall error.
+/// Returns process id or a syscall error.
 ///
 /// # Scheduler Algorithm V1
 ///
@@ -624,7 +623,6 @@ pub fn spawn(
 }
 
 /// The syscall pauses until the execution of a process specified by pid has ended.
-/// Note: available after ckb 2nd hardfork.
 ///
 /// # Arguments
 ///
@@ -642,14 +640,12 @@ pub fn wait(pid: u64) -> Result<i8, SysError> {
 }
 
 /// This syscall is used to get the current process id. Root process ID is 0.
-/// Note: available after ckb 2nd hardfork.
 pub fn process_id() -> u64 {
     unsafe { syscall(0, 0, 0, 0, 0, 0, SYS_PROCESS_ID) }
 }
 
 /// This syscall create a pipe with read-write pair of file descriptions. The file descriptor with read permission is
 /// located at fds[0], and the corresponding file descriptor with write permission is located at fds[1].
-/// Note: available after ckb 2nd hardfork.
 pub fn pipe() -> Result<(u64, u64), SysError> {
     let mut fds: [u64; 2] = [0, 0];
     let ret = unsafe { syscall(fds.as_mut_ptr() as u64, 0, 0, 0, 0, 0, SYS_PIPE) };
@@ -662,7 +658,6 @@ pub fn pipe() -> Result<(u64, u64), SysError> {
 
 /// This syscall reads data from a pipe via a file descriptor. The syscall Read attempts to read up to value pointed by
 /// length bytes from file descriptor fd into the buffer, and the actual length of data read is returned.
-/// Note: available after ckb 2nd hardfork.
 pub fn read(fd: u64, buffer: &mut [u8]) -> Result<usize, SysError> {
     let mut l: u64 = buffer.len() as u64;
     let ret = unsafe {
@@ -690,8 +685,6 @@ pub fn read(fd: u64, buffer: &mut [u8]) -> Result<usize, SysError> {
 ///
 /// If buffer is empty and fd is avaliable, then write() can still succeed: A data with a length of 0 is written to the
 /// pipe. The peer needs to use a read() syscall to consume the empty data, and read() will returns Ok(0).
-///
-/// Note: available after ckb 2nd hardfork.
 pub fn write(fd: u64, buffer: &[u8]) -> Result<usize, SysError> {
     let mut l: u64 = buffer.len() as u64;
     let ret = unsafe {
@@ -716,7 +709,6 @@ pub fn write(fd: u64, buffer: &[u8]) -> Result<usize, SysError> {
 
 /// This syscall retrieves the file descriptors available to the current process, which are passed in from the parent
 /// process. These results are copied from the inherited_fds parameter of the Spawn syscall.
-/// Note: available after ckb 2nd hardfork.
 pub fn inherited_fds(fds: &mut [u64]) -> u64 {
     let mut l: u64 = fds.len() as u64;
     unsafe {
@@ -735,7 +727,6 @@ pub fn inherited_fds(fds: &mut [u64]) -> u64 {
 
 /// This syscall manually closes a file descriptor. After calling this, any attempt to read/write the file descriptor
 /// pointed to the other end would fail.
-/// Note: available after ckb 2nd hardfork.
 pub fn close(fd: u64) -> Result<(), SysError> {
     let ret = unsafe { syscall(fd, 0, 0, 0, 0, 0, SYS_CLOSE) };
     match ret {
@@ -754,8 +745,6 @@ pub fn close(fd: u64) -> Result<(), SysError> {
 /// * `offset` - offset
 /// * `index` - index of cell
 /// * `source` - source of cell
-///
-/// Note: available after ckb 2nd hardfork.
 pub fn load_block_extension(
     buf: &mut [u8],
     offset: usize,