From d1082a00b768218f45eb7c1c43e47b5452a5b67f Mon Sep 17 00:00:00 2001
From: Idan Horowitz <idan.horowitz@gmail.com>
Date: Tue, 4 Apr 2023 14:13:41 +0300
Subject: [PATCH] Kernel: Mark sys$set_mmap_name 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/mmap.cpp | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/Kernel/API/Syscall.h b/Kernel/API/Syscall.h
index 3b91d57c03..ab74efa75f 100644
--- a/Kernel/API/Syscall.h
+++ b/Kernel/API/Syscall.h
@@ -157,7 +157,7 @@ enum class NeedsBigProcessLock {
     S(scheduler_set_parameters, NeedsBigProcessLock::No)   \
     S(sendfd, NeedsBigProcessLock::No)                     \
     S(sendmsg, NeedsBigProcessLock::Yes)                   \
-    S(set_mmap_name, NeedsBigProcessLock::Yes)             \
+    S(set_mmap_name, NeedsBigProcessLock::No)              \
     S(set_thread_name, NeedsBigProcessLock::No)            \
     S(setegid, NeedsBigProcessLock::No)                    \
     S(seteuid, NeedsBigProcessLock::No)                    \
diff --git a/Kernel/Syscalls/mmap.cpp b/Kernel/Syscalls/mmap.cpp
index 31b84f3ccc..8e66f4ca03 100644
--- a/Kernel/Syscalls/mmap.cpp
+++ b/Kernel/Syscalls/mmap.cpp
@@ -441,7 +441,7 @@ ErrorOr<FlatPtr> Process::sys$madvise(Userspace<void*> address, size_t size, int
 
 ErrorOr<FlatPtr> Process::sys$set_mmap_name(Userspace<Syscall::SC_set_mmap_name_params const*> user_params)
 {
-    VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this);
+    VERIFY_NO_PROCESS_BIG_LOCK(this);
     TRY(require_promise(Pledge::stdio));
     auto params = TRY(copy_typed_from_user(user_params));