From 2ddd69260ca7a4ab62cbed3a5fd4000e49e733bd Mon Sep 17 00:00:00 2001
From: Andreas Kling <kling@serenityos.org>
Date: Mon, 3 Apr 2023 13:33:04 +0200
Subject: [PATCH] Kernel: Mark sys$getpgid 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 0ea820c6d9..9da9230427 100644
--- a/Kernel/API/Syscall.h
+++ b/Kernel/API/Syscall.h
@@ -96,7 +96,7 @@ enum class NeedsBigProcessLock {
     S(gethostname, NeedsBigProcessLock::No)                 \
     S(getkeymap, NeedsBigProcessLock::No)                   \
     S(getpeername, NeedsBigProcessLock::Yes)                \
-    S(getpgid, NeedsBigProcessLock::Yes)                    \
+    S(getpgid, NeedsBigProcessLock::No)                     \
     S(getpgrp, NeedsBigProcessLock::Yes)                    \
     S(getpid, NeedsBigProcessLock::No)                      \
     S(getppid, NeedsBigProcessLock::No)                     \
diff --git a/Kernel/Syscalls/setpgid.cpp b/Kernel/Syscalls/setpgid.cpp
index 96b5da049a..738f78e508 100644
--- a/Kernel/Syscalls/setpgid.cpp
+++ b/Kernel/Syscalls/setpgid.cpp
@@ -49,7 +49,7 @@ ErrorOr<FlatPtr> Process::sys$setsid()
 
 ErrorOr<FlatPtr> Process::sys$getpgid(pid_t pid)
 {
-    VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this);
+    VERIFY_NO_PROCESS_BIG_LOCK(this);
     TRY(require_promise(Pledge::stdio));
     if (pid == 0)
         return pgid().value();