From 13824392678d7f78d65f4cbed44ffaa546cac6fc Mon Sep 17 00:00:00 2001
From: Andreas Kling <kling@serenityos.org>
Date: Mon, 3 Apr 2023 13:34:00 +0200
Subject: [PATCH] Kernel: Mark sys$getpgrp as not needing the big lock

Access to the process's process group is already serialized by
SpinlockProtected.
---
 Kernel/API/Syscall.h        | 2 +-
 Kernel/Syscalls/setpgid.cpp | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/Kernel/API/Syscall.h b/Kernel/API/Syscall.h
index 9da9230427..00a56a5d20 100644
--- a/Kernel/API/Syscall.h
+++ b/Kernel/API/Syscall.h
@@ -97,7 +97,7 @@ enum class NeedsBigProcessLock {
     S(getkeymap, NeedsBigProcessLock::No)                   \
     S(getpeername, NeedsBigProcessLock::Yes)                \
     S(getpgid, NeedsBigProcessLock::No)                     \
-    S(getpgrp, NeedsBigProcessLock::Yes)                    \
+    S(getpgrp, NeedsBigProcessLock::No)                     \
     S(getpid, NeedsBigProcessLock::No)                      \
     S(getppid, NeedsBigProcessLock::No)                     \
     S(getrandom, NeedsBigProcessLock::No)                   \
diff --git a/Kernel/Syscalls/setpgid.cpp b/Kernel/Syscalls/setpgid.cpp
index 738f78e508..39dc2b4d94 100644
--- a/Kernel/Syscalls/setpgid.cpp
+++ b/Kernel/Syscalls/setpgid.cpp
@@ -61,7 +61,7 @@ ErrorOr<FlatPtr> Process::sys$getpgid(pid_t pid)
 
 ErrorOr<FlatPtr> Process::sys$getpgrp()
 {
-    VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this);
+    VERIFY_NO_PROCESS_BIG_LOCK(this);
     TRY(require_promise(Pledge::stdio));
     return pgid().value();
 }