From 0b14081ae191d5fcbd831ad8542a22632aa18f93 Mon Sep 17 00:00:00 2001
From: Idan Horowitz <idan.horowitz@gmail.com>
Date: Tue, 4 Apr 2023 14:02:39 +0300
Subject: [PATCH] Kernel: Mark sys$map_time_page as not needing the big lock

All accesses to shared mutable data are already serialized behind the
process address space spinlock.
---
 Kernel/API/Syscall.h      | 2 +-
 Kernel/Syscalls/clock.cpp | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/Kernel/API/Syscall.h b/Kernel/API/Syscall.h
index dec6baa4b5..a7f134eec9 100644
--- a/Kernel/API/Syscall.h
+++ b/Kernel/API/Syscall.h
@@ -122,7 +122,7 @@ enum class NeedsBigProcessLock {
     S(listen, NeedsBigProcessLock::No)                     \
     S(lseek, NeedsBigProcessLock::No)                      \
     S(madvise, NeedsBigProcessLock::No)                    \
-    S(map_time_page, NeedsBigProcessLock::Yes)             \
+    S(map_time_page, NeedsBigProcessLock::No)              \
     S(mkdir, NeedsBigProcessLock::No)                      \
     S(mknod, NeedsBigProcessLock::No)                      \
     S(mmap, NeedsBigProcessLock::Yes)                      \
diff --git a/Kernel/Syscalls/clock.cpp b/Kernel/Syscalls/clock.cpp
index 8dc4571e71..b8ab20c97f 100644
--- a/Kernel/Syscalls/clock.cpp
+++ b/Kernel/Syscalls/clock.cpp
@@ -12,7 +12,7 @@ namespace Kernel {
 
 ErrorOr<FlatPtr> Process::sys$map_time_page()
 {
-    VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this);
+    VERIFY_NO_PROCESS_BIG_LOCK(this);
     TRY(require_promise(Pledge::stdio));
 
     auto& vmobject = TimeManagement::the().time_page_vmobject();