Prev implementation of lwp_new() including the create of lwp object
and the pid allocation. But not every lwp object need a pid.
So this patch split out the business of lwp_new() to improve the
maintainability.
Signed-off-by: Shell <smokewood@qq.com>
* Synchronize the code of the rt mart branch to the master branch.
* TTY device
* Add lwP code from rt-smart
* Add vnode in DFS, but DFS will be re-write for rt-smart
* There are three libcpu for rt-smart:
* arm/cortex-a, arm/aarch64
* riscv64
Co-authored-by: Rbb666 <zhangbingru@rt-thread.com>
Co-authored-by: zhkag <zhkag@foxmail.com>