[PATCH printk v2 24/38] xen: fbfront: use srcu console list iterator

John Ogness
2022-10-19T15:06:53Z

Since the console_lock is not being used for anything other than
safe console list traversal, use srcu console list iteration instead.

Signed-off-by: John Ogness <john.ogness@linutronix.de>
---
drivers/video/fbdev/xen-fbfront.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/video/fbdev/xen-fbfront.c b/drivers/video/fbdev/xen-fbfront.c
index 4d2694d904aa..2552c853c6c2 100644
--- a/drivers/video/fbdev/xen-fbfront.c
+++ b/drivers/video/fbdev/xen-fbfront.c
@@ -500,16 +500,18 @@ static int xenfb_probe(struct xenbus_device *dev,
static void xenfb_make_preferred_console(void)
{
struct console *c;
+ int cookie;

if (console_set_on_cmdline)
return;

- console_lock();
- for_each_console(c) {
+ cookie = console_srcu_read_lock();
+ for_each_console_srcu(c) {
if (!strcmp(c->name, "tty") && c->index == 0)
break;
}
- console_unlock();
+ console_srcu_read_unlock(cookie);
+
if (c) {
unregister_console(c);
c->flags |= CON_CONSDEV;
--
2.30.2