Kernel: Replace KResult and KResultOr<T> with Error and ErrorOr<T>

We now use AK::Error and AK::ErrorOr<T> in both kernel and userspace!
This was a slightly tedious refactoring that took a long time, so it's
not unlikely that some bugs crept in.

Nevertheless, it does pass basic functionality testing, and it's just
real nice to finally see the same pattern in all contexts. :^)

1 files changed, 5 insertions, 4 deletions

diff --git a/Kernel/Syscalls/sched.cpp b/Kernel/Syscalls/sched.cpp
index 270e15fcd1..cc2b7d568d 100644
--- a/Kernel/Syscalls/sched.cpp
+++ b/Kernel/Syscalls/sched.cpp
@@ -8,7 +8,7 @@
 
 namespace Kernel {
 
-KResultOr<FlatPtr> Process::sys$yield()
+ErrorOr<FlatPtr> Process::sys$yield()
 {
     VERIFY_NO_PROCESS_BIG_LOCK(this);
     REQUIRE_PROMISE(stdio);
@@ -16,7 +16,7 @@ KResultOr<FlatPtr> Process::sys$yield()
     return 0;
 }
 
-KResultOr<FlatPtr> Process::sys$sched_setparam(int pid, Userspace<const struct sched_param*> user_param)
+ErrorOr<FlatPtr> Process::sys$sched_setparam(int pid, Userspace<const struct sched_param*> user_param)
 {
     VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
     REQUIRE_PROMISE(proc);
@@ -41,7 +41,7 @@ KResultOr<FlatPtr> Process::sys$sched_setparam(int pid, Userspace<const struct s
     return 0;
 }
 
-KResultOr<FlatPtr> Process::sys$sched_getparam(pid_t pid, Userspace<struct sched_param*> user_param)
+ErrorOr<FlatPtr> Process::sys$sched_getparam(pid_t pid, Userspace<struct sched_param*> user_param)
 {
     VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
     REQUIRE_PROMISE(proc);
@@ -68,7 +68,8 @@ KResultOr<FlatPtr> Process::sys$sched_getparam(pid_t pid, Userspace<struct sched
         priority
     };
 
-    return copy_to_user(user_param, &param);
+    TRY(copy_to_user(user_param, &param));
+    return 0;
 }
 
 }