Tracking issue: Port RROS kernel onto Linux 6.6

[shannmu]

v6.6.y-rros-rebase tracing issue

What we have done

Now we have a branch named v6.6.y-rros-rebase, which rebases the v5.13-rros code onto linux 6.6.23.

What i did on this branch:

1. Use v6.6.y from the linux-stable kernel tree as codebase

2. Set the code's HEAD to Linux 6.6.23

3. Apply the v6.6.y-linux-dovetail patch set

4. Apply the Enable Rust support for AArch64 patchset

5. Port rros kernel to Linux 6.6.23

   • Add rros kernel code

   • Add placeholder code in dovetail interface

   • Add rust wrapper code used in rros but not in the v6.6.y. For the rust wrapper code whose API used by rros has changed, I also copied the old version of the wrapper code and compiled them conditionally through CONFIG_RROS, including SpinLock, Mutex, WorkQueue, CondVar, Arc, Box, Error, ARef, module::module. All rust wrapper code not in linux-stable is also conditionally compiled with CONFIG_RROS(there may be omissions).

   • Add some features used in rros on Makefile.build

   • Make rust-analyzer parse rros code

   • Conditional compilation helper function

   • Fixed some code issues caused by Linux C code changes

     • Changes of the sb_buff structure and related functions
     • Some functions have been made inline
     • Changes of vm_area_struct

What we should do next

• Port rros kernel onto new r4l wrapper, including SpinLock, Mutex, WorkQueue, Arc
  • Feat Request: Port RROS kernel onto SpinLock of Linux 6.6.23 #63
  • Feat Request: Port RROS kernel onto Error of Linux 6.6 #64
• Add a devops approach to get daily updates of r4l code and automatically rebase. Email alerts to community members when rebase fails (Feat Request: Build a CI/CD or a robot to backport new R4L wrappers #65)

Guidelines about how to port rros kernel onto new r4l wrapper

NOTE: Ensure that each commit code is compilable and that the functionality of the entire PR passes the test

1. Add a new config for which wrapper you want to port
   e.g. for SpinLock, add a CONFIG_RROS_SPINLOCK to replace CONFIG_RROS
2. Remove the CONFIG_RROS_XXX and the unstable wrapper, and make the rros kernel compile
3. Test rros kernel code by using libevl

Additional Information

I think we can use the code after this issue is closed as the codebase for the #48