From ad419a669d1fd71781680246463d9018814997e2 Mon Sep 17 00:00:00 2001
From: Idan Horowitz <idan.horowitz@gmail.com>
Date: Fri, 6 Aug 2021 15:27:03 +0300
Subject: [PATCH] Kernel: Disable big process lock for sys$sysconf

This syscall only reads constant kernel globals, and as such does not
need to hold the big lock.
---
 Kernel/API/Syscall.h        | 2 +-
 Kernel/Syscalls/sysconf.cpp | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/Kernel/API/Syscall.h b/Kernel/API/Syscall.h
index 0ee2f8a6dc..50f75daa06 100644
--- a/Kernel/API/Syscall.h
+++ b/Kernel/API/Syscall.h
@@ -181,7 +181,7 @@ enum class NeedsBigProcessLock {
     S(ptrace, NeedsBigProcessLock::Yes)                     \
     S(sendfd, NeedsBigProcessLock::Yes)                     \
     S(recvfd, NeedsBigProcessLock::Yes)                     \
-    S(sysconf, NeedsBigProcessLock::Yes)                    \
+    S(sysconf, NeedsBigProcessLock::No)                     \
     S(set_process_name, NeedsBigProcessLock::Yes)           \
     S(disown, NeedsBigProcessLock::Yes)                     \
     S(adjtime, NeedsBigProcessLock::Yes)                    \
diff --git a/Kernel/Syscalls/sysconf.cpp b/Kernel/Syscalls/sysconf.cpp
index 932d4ae4e3..e898d74dfd 100644
--- a/Kernel/Syscalls/sysconf.cpp
+++ b/Kernel/Syscalls/sysconf.cpp
@@ -11,7 +11,7 @@ namespace Kernel {
 
 KResultOr<FlatPtr> Process::sys$sysconf(int name)
 {
-    VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
+    VERIFY_NO_PROCESS_BIG_LOCK(this)
     switch (name) {
     case _SC_MONOTONIC_CLOCK:
         return 1;