From 7b3642d08c11db7b02f205a8b649b5ffcc609bf2 Mon Sep 17 00:00:00 2001
From: Andreas Kling <kling@serenityos.org>
Date: Tue, 8 Mar 2022 16:39:58 +0100
Subject: [PATCH] Kernel: Mark sys$lseek() as not needing the big lock

This syscall doesn't access any data that was implicitly protected by
the big lock.
---
 Kernel/API/Syscall.h      | 2 +-
 Kernel/Syscalls/lseek.cpp | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/Kernel/API/Syscall.h b/Kernel/API/Syscall.h
index 5a95696a72..ab809805a4 100644
--- a/Kernel/API/Syscall.h
+++ b/Kernel/API/Syscall.h
@@ -111,7 +111,7 @@ enum class NeedsBigProcessLock {
     S(killpg, NeedsBigProcessLock::Yes)                     \
     S(link, NeedsBigProcessLock::Yes)                       \
     S(listen, NeedsBigProcessLock::Yes)                     \
-    S(lseek, NeedsBigProcessLock::Yes)                      \
+    S(lseek, NeedsBigProcessLock::No)                       \
     S(madvise, NeedsBigProcessLock::Yes)                    \
     S(map_time_page, NeedsBigProcessLock::Yes)              \
     S(mkdir, NeedsBigProcessLock::Yes)                      \
diff --git a/Kernel/Syscalls/lseek.cpp b/Kernel/Syscalls/lseek.cpp
index 2422dce950..52e15bef50 100644
--- a/Kernel/Syscalls/lseek.cpp
+++ b/Kernel/Syscalls/lseek.cpp
@@ -11,7 +11,7 @@ namespace Kernel {
 
 ErrorOr<FlatPtr> Process::sys$lseek(int fd, Userspace<off_t*> userspace_offset, int whence)
 {
-    VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
+    VERIFY_NO_PROCESS_BIG_LOCK(this);
     TRY(require_promise(Pledge::stdio));
     auto description = TRY(open_file_description(fd));
     off_t offset;