xen/manage: Constify struct shutdown_handler

'struct shutdown_handler' is not modified in this driver.

Constifying this structure moves some data to a read-only section, so
increase overall security.

On a x86_64, with allmodconfig:
Before:
======
   text	   data	    bss	    dec	    hex	filename
   7043	    788	      8	   7839	   1e9f	drivers/xen/manage.o

After:
=====
   text	   data	    bss	    dec	    hex	filename
   7164	    676	      8	   7848	   1ea8	drivers/xen/manage.o

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Juergen Gross <jgross@suse.com>
Link: https://lore.kernel.org/r/ca1e75f66aed43191cf608de6593c7d6db9148f1.1719134768.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Juergen Gross <jgross@suse.com>

diff --git a/drivers/xen/manage.c b/drivers/xen/manage.c
index c16df629907e13d4d4f3ace2ceaa5f8b669afc54..b4b4ebed68daf59dbdcea63556e9651d2e6ff24d 100644 (file)
--- a/drivers/xen/manage.c
+++ b/drivers/xen/manage.c
@@ -208,7 +208,7 @@ static void do_reboot(void)
        orderly_reboot();
 }
 
-static struct shutdown_handler shutdown_handlers[] = {
+static const struct shutdown_handler shutdown_handlers[] = {
        { "poweroff",   true,   do_poweroff },
        { "halt",       false,  do_poweroff },
        { "reboot",     true,   do_reboot   },