[PATCH 5.16 0184/1017] xtensa: fix stop_machine_cpuslocked call in patch_text

From: Greg Kroah-Hartman
Date: Tue Apr 05 2022 - 08:05:37 EST

From: Max Filippov <jcmvbkbc@xxxxxxxxx>

commit f406f2d03e07afc199dd8cf501f361dde6be8a69 upstream.

patch_text must invoke patch_text_stop_machine on all online CPUs, but
it calls stop_machine_cpuslocked with NULL cpumask. As a result only one
CPU runs patch_text_stop_machine potentially leaving stale icache
entries on other CPUs. Fix that by calling stop_machine_cpuslocked with
cpu_online_mask as the last argument.

Cc: stable@xxxxxxxxxxxxxxx
Fixes: 64711f9a47d4 ("xtensa: implement jump_label support")
Signed-off-by: Max Filippov <jcmvbkbc@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
arch/xtensa/kernel/jump_label.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/xtensa/kernel/jump_label.c
+++ b/arch/xtensa/kernel/jump_label.c
@@ -61,7 +61,7 @@ static void patch_text(unsigned long add
.data = data,
- &patch, NULL);
+ &patch, cpu_online_mask);
} else {
unsigned long flags;