From 1474b18070b92bafec3cb1dd8ffef9f26aa17ca1 Mon Sep 17 00:00:00 2001
From: Idan Horowitz <idan.horowitz@gmail.com>
Date: Sat, 9 Apr 2022 23:05:32 +0300
Subject: [PATCH] Kernel: Remove big lock from sys$link

This syscall doesn't access any unprotected shared data.
---
 Kernel/API/Syscall.h     | 2 +-
 Kernel/Syscalls/link.cpp | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/Kernel/API/Syscall.h b/Kernel/API/Syscall.h
index b6150dea75..14093bfd4a 100644
--- a/Kernel/API/Syscall.h
+++ b/Kernel/API/Syscall.h
@@ -109,7 +109,7 @@ enum class NeedsBigProcessLock {
     S(kill, NeedsBigProcessLock::Yes)                       \
     S(kill_thread, NeedsBigProcessLock::Yes)                \
     S(killpg, NeedsBigProcessLock::Yes)                     \
-    S(link, NeedsBigProcessLock::Yes)                       \
+    S(link, NeedsBigProcessLock::No)                        \
     S(listen, NeedsBigProcessLock::No)                      \
     S(lseek, NeedsBigProcessLock::No)                       \
     S(madvise, NeedsBigProcessLock::Yes)                    \
diff --git a/Kernel/Syscalls/link.cpp b/Kernel/Syscalls/link.cpp
index a2b23589d1..48a937568c 100644
--- a/Kernel/Syscalls/link.cpp
+++ b/Kernel/Syscalls/link.cpp
@@ -12,7 +12,7 @@ namespace Kernel {
 
 ErrorOr<FlatPtr> Process::sys$link(Userspace<Syscall::SC_link_params const*> user_params)
 {
-    VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
+    VERIFY_NO_PROCESS_BIG_LOCK(this)
     TRY(require_promise(Pledge::cpath));
     auto params = TRY(copy_typed_from_user(user_params));
     auto old_path = TRY(try_copy_kstring_from_user(params.old_path));