diff mbox series

[5.4,081/475] xtensa: fix stop_machine_cpuslocked call in patch_text

Message ID 20220414110857.422252189@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg Kroah-Hartman April 14, 2022, 1:07 p.m. UTC 
From: Max Filippov <jcmvbkbc@gmail.com>

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@vger.kernel.org
Fixes: 64711f9a47d4 ("xtensa: implement jump_label support")
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 arch/xtensa/kernel/jump_label.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

--- 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,
 		};
 		stop_machine_cpuslocked(patch_text_stop_machine,
-					&patch, NULL);
+					&patch, cpu_online_mask);
 	} else {
 		unsigned long flags;