From 2688ee28ff3d24d9cc3f753432f504dc9b602077 Mon Sep 17 00:00:00 2001
From: Andreas Kling <kling@serenityos.org>
Date: Mon, 7 Mar 2022 21:33:44 +0100
Subject: [PATCH] Kernel: Mark sys$stat() as not needing the big lock

This syscall doesn't access any data that was implicitly protected by
the big lock.
---
 Kernel/API/Syscall.h     | 2 +-
 Kernel/Syscalls/stat.cpp | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/Kernel/API/Syscall.h b/Kernel/API/Syscall.h
index 76c1c15677..1877c870e5 100644
--- a/Kernel/API/Syscall.h
+++ b/Kernel/API/Syscall.h
@@ -179,7 +179,7 @@ enum class NeedsBigProcessLock {
     S(sigtimedwait, NeedsBigProcessLock::Yes)               \
     S(socket, NeedsBigProcessLock::Yes)                     \
     S(socketpair, NeedsBigProcessLock::Yes)                 \
-    S(stat, NeedsBigProcessLock::Yes)                       \
+    S(stat, NeedsBigProcessLock::No)                        \
     S(statvfs, NeedsBigProcessLock::Yes)                    \
     S(symlink, NeedsBigProcessLock::Yes)                    \
     S(sync, NeedsBigProcessLock::No)                        \
diff --git a/Kernel/Syscalls/stat.cpp b/Kernel/Syscalls/stat.cpp
index f35a76df2e..8c9a191916 100644
--- a/Kernel/Syscalls/stat.cpp
+++ b/Kernel/Syscalls/stat.cpp
@@ -23,7 +23,7 @@ ErrorOr<FlatPtr> Process::sys$fstat(int fd, Userspace<stat*> user_statbuf)
 
 ErrorOr<FlatPtr> Process::sys$stat(Userspace<const Syscall::SC_stat_params*> user_params)
 {
-    VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
+    VERIFY_NO_PROCESS_BIG_LOCK(this);
     TRY(require_promise(Pledge::rpath));
     auto params = TRY(copy_typed_from_user(user_params));