Add mutable functionality to the process VMAR

kernel/src/syscall/sched_getattr.rs

@@ -130,7 +130,7 @@ pub(super) fn read_linux_sched_attr_from_user(
 ) -> Result<LinuxSchedAttr> {
     let type_size = mem::size_of::<LinuxSchedAttr>();
 
-    let space = CurrentUserSpace::new(ctx.task);
+    let space = ctx.user_space();
 
     let mut attr = LinuxSchedAttr::default();
 
@@ -160,7 +160,7 @@ pub(super) fn write_linux_sched_attr_to_user(
     user_size: u32,
     ctx: &Context,
 ) -> Result<()> {
-    let space = CurrentUserSpace::new(ctx.task);
+    let space = ctx.user_space();
 
     attr.size = (mem::size_of::<LinuxSchedAttr>() as u32).min(user_size);
 

kernel/src/syscall/sched_getparam.rs

@@ -10,7 +10,7 @@ pub fn sys_sched_getparam(tid: Tid, addr: Vaddr, ctx: &Context) -> Result<Syscal
         _ => 0,
     };
 
-    let space = CurrentUserSpace::new(ctx.task);
+    let space = ctx.user_space();
     space
         .write_val(addr, &rt_prio)
         .map_err(|_| Error::new(Errno::EINVAL))?;

kernel/src/syscall/sched_setparam.rs

@@ -4,7 +4,7 @@ use super::{sched_getattr::access_sched_attr_with, SyscallReturn};
 use crate::{prelude::*, sched::SchedPolicy, thread::Tid};
 
 pub fn sys_sched_setparam(tid: Tid, addr: Vaddr, ctx: &Context) -> Result<SyscallReturn> {
-    let space = CurrentUserSpace::new(ctx.task);
+    let space = ctx.user_space();
     let prio: i32 = space
         .read_val(addr)
         .map_err(|_| Error::new(Errno::EINVAL))?;

kernel/src/syscall/sched_setscheduler.rs

@@ -12,7 +12,7 @@ pub fn sys_sched_setscheduler(
     addr: Vaddr,
     ctx: &Context,
 ) -> Result<SyscallReturn> {
-    let space = CurrentUserSpace::new(&ctx.task);
+    let space = ctx.user_space();
     let prio = space
         .read_val(addr)
         .map_err(|_| Error::new(Errno::EINVAL))?;