Kernel: Remove big lock from sys$rename

This syscall doesn't access any unprotected shared data.

Author: IdanHo

Kernel/API/Syscall.h

@@ -142,7 +142,7 @@ enum class NeedsBigProcessLock {
     S(realpath, NeedsBigProcessLock::No)                    \
     S(recvfd, NeedsBigProcessLock::No)                      \
     S(recvmsg, NeedsBigProcessLock::Yes)                    \
-    S(rename, NeedsBigProcessLock::Yes)                     \
+    S(rename, NeedsBigProcessLock::No)                      \
     S(rmdir, NeedsBigProcessLock::No)                       \
     S(sched_getparam, NeedsBigProcessLock::No)              \
     S(sched_setparam, NeedsBigProcessLock::No)              \

Kernel/Syscalls/rename.cpp

@@ -12,7 +12,7 @@ namespace Kernel {
 
 ErrorOr<FlatPtr> Process::sys$rename(Userspace<Syscall::SC_rename_params const*> user_params)
 {
-    VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
+    VERIFY_NO_PROCESS_BIG_LOCK(this)
     TRY(require_promise(Pledge::cpath));
     auto params = TRY(copy_typed_from_user(user_params));
     auto old_path = TRY(get_syscall_path_argument(params.old_path));