From: Heiko Carstens <hca@linux.ibm.com>
Date: Mon, 28 Feb 2022 09:45:43 +0000 (+0100)
Subject: s390/extable: sort amode31 extable early
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=a156f09c9063bc6c11502fc49a6d006489f25eb3;p=linux.git

s390/extable: sort amode31 extable early

The early program check handler is active before the amode31 extable
is sorted. Therefore in case a program check happens early within the
amode31 code the extable entry might not be found.

Fix this by sorting the amode31 extable early.

Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
---

diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c
index b8cfac4918d9d..3dae0c04d33b4 100644
--- a/arch/s390/kernel/early.c
+++ b/arch/s390/kernel/early.c
@@ -293,6 +293,11 @@ static void __init check_image_bootable(void)
 	disabled_wait();
 }
 
+static void __init sort_amode31_extable(void)
+{
+	sort_extable(__start_amode31_ex_table, __stop_amode31_ex_table);
+}
+
 void __init startup_init(void)
 {
 	sclp_early_adjust_va();
@@ -301,6 +306,7 @@ void __init startup_init(void)
 	time_early_init();
 	init_kernel_storage_key();
 	lockdep_off();
+	sort_amode31_extable();
 	setup_lowcore_early();
 	setup_facility_list();
 	detect_machine_type();
diff --git a/arch/s390/kernel/traps.c b/arch/s390/kernel/traps.c
index 2b780786fc689..c2b1ffe88acfa 100644
--- a/arch/s390/kernel/traps.c
+++ b/arch/s390/kernel/traps.c
@@ -291,7 +291,6 @@ static void __init test_monitor_call(void)
 
 void __init trap_init(void)
 {
-	sort_extable(__start_amode31_ex_table, __stop_amode31_ex_table);
 	local_mcck_enable();
 	test_monitor_call();
 }