From 46ef2f8e202b97c302633faca82ce106671d07bc Mon Sep 17 00:00:00 2001
From: Liav A <liavalb@gmail.com>
Date: Fri, 26 May 2023 14:02:15 +0300
Subject: [PATCH] Kernel: Mark sys$fork as not needing the big lock

All shared structures are already protected by "atomic" spinlocks for
those structures, so there's no need to take the big process lock.
---
 Kernel/API/Syscall.h     | 2 +-
 Kernel/Syscalls/fork.cpp | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/Kernel/API/Syscall.h b/Kernel/API/Syscall.h
index afa6fc57f07..e7c44f14acb 100644
--- a/Kernel/API/Syscall.h
+++ b/Kernel/API/Syscall.h
@@ -79,7 +79,7 @@ enum class NeedsBigProcessLock {
     S(fchmod, NeedsBigProcessLock::No)                     \
     S(fchown, NeedsBigProcessLock::No)                     \
     S(fcntl, NeedsBigProcessLock::No)                      \
-    S(fork, NeedsBigProcessLock::Yes)                      \
+    S(fork, NeedsBigProcessLock::No)                       \
     S(fstat, NeedsBigProcessLock::No)                      \
     S(fstatvfs, NeedsBigProcessLock::No)                   \
     S(fsync, NeedsBigProcessLock::No)                      \
diff --git a/Kernel/Syscalls/fork.cpp b/Kernel/Syscalls/fork.cpp
index d58e76d5443..927ad57e439 100644
--- a/Kernel/Syscalls/fork.cpp
+++ b/Kernel/Syscalls/fork.cpp
@@ -17,7 +17,7 @@ namespace Kernel {
 
 ErrorOr<FlatPtr> Process::sys$fork(RegisterState& regs)
 {
-    VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this);
+    VERIFY_NO_PROCESS_BIG_LOCK(this);
     TRY(require_promise(Pledge::proc));
 
     auto child_name = TRY(name().with([](auto& name) { return name->try_clone(); }));