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, 3 insertions, 6 deletions

diff --git a/Kernel/Syscalls/get_dir_entries.cpp b/Kernel/Syscalls/get_dir_entries.cpp
index 49e0fba98e..604ab58af1 100644
--- a/Kernel/Syscalls/get_dir_entries.cpp
+++ b/Kernel/Syscalls/get_dir_entries.cpp
@@ -9,7 +9,7 @@
 
 namespace Kernel {
 
-KResultOr<FlatPtr> Process::sys$get_dir_entries(int fd, Userspace<void*> user_buffer, size_t user_size)
+ErrorOr<FlatPtr> Process::sys$get_dir_entries(int fd, Userspace<void*> user_buffer, size_t user_size)
 {
     VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this);
     REQUIRE_PROMISE(stdio);
@@ -19,11 +19,8 @@ KResultOr<FlatPtr> Process::sys$get_dir_entries(int fd, Userspace<void*> user_bu
     auto buffer = UserOrKernelBuffer::for_user_buffer(user_buffer, static_cast<size_t>(user_size));
     if (!buffer.has_value())
         return EFAULT;
-    auto result = description->get_dir_entries(buffer.value(), user_size);
-    if (result.is_error())
-        return result.error();
-    else
-        return result.release_value();
+    auto count = TRY(description->get_dir_entries(buffer.value(), user_size));
+    return count;
 }
 
 }