From 8458313e8a39a6fe67664551d7faaf6dae3eb1f0 Mon Sep 17 00:00:00 2001
From: Idan Horowitz <idan.horowitz@gmail.com>
Date: Sat, 9 Apr 2022 22:44:01 +0300
Subject: [PATCH] Kernel: Remove big lock from sys$fchown

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

diff --git a/Kernel/API/Syscall.h b/Kernel/API/Syscall.h
index 4fc3c2716b..ded692e127 100644
--- a/Kernel/API/Syscall.h
+++ b/Kernel/API/Syscall.h
@@ -69,7 +69,7 @@ enum class NeedsBigProcessLock {
     S(exit_thread, NeedsBigProcessLock::Yes)                \
     S(fchdir, NeedsBigProcessLock::No)                      \
     S(fchmod, NeedsBigProcessLock::No)                      \
-    S(fchown, NeedsBigProcessLock::Yes)                     \
+    S(fchown, NeedsBigProcessLock::No)                      \
     S(fcntl, NeedsBigProcessLock::Yes)                      \
     S(fork, NeedsBigProcessLock::Yes)                       \
     S(fstat, NeedsBigProcessLock::No)                       \
diff --git a/Kernel/Syscalls/chown.cpp b/Kernel/Syscalls/chown.cpp
index 797804da87..97ba35a21e 100644
--- a/Kernel/Syscalls/chown.cpp
+++ b/Kernel/Syscalls/chown.cpp
@@ -13,7 +13,7 @@ namespace Kernel {
 
 ErrorOr<FlatPtr> Process::sys$fchown(int fd, UserID uid, GroupID gid)
 {
-    VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this);
+    VERIFY_NO_PROCESS_BIG_LOCK(this);
     TRY(require_promise(Pledge::chown));
     auto description = TRY(open_file_description(fd));
     TRY(description->chown(uid, gid));