kobject: show debug info on delayed kobject release
authorFengguang Wu <fengguang.wu@intel.com>
Wed, 9 Oct 2013 01:26:21 +0000 (09:26 +0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 10 Oct 2013 20:56:52 +0000 (13:56 -0700)
Useful for locating buggy drivers on kernel oops.

It may add dozens of new lines to boot dmesg. DEBUG_KOBJECT_RELEASE is
hopefully only enabled in debug kernels (like maybe the Fedora rawhide
one, or at developers), so being a bit more verbose is likely ok.

Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
lib/kobject.c

index 669bf19..084f7b1 100644 (file)
@@ -592,7 +592,7 @@ static void kobject_release(struct kref *kref)
 {
        struct kobject *kobj = container_of(kref, struct kobject, kref);
 #ifdef CONFIG_DEBUG_KOBJECT_RELEASE
-       pr_debug("kobject: '%s' (%p): %s, parent %p (delayed)\n",
+       pr_info("kobject: '%s' (%p): %s, parent %p (delayed)\n",
                 kobject_name(kobj), kobj, __func__, kobj->parent);
        INIT_DELAYED_WORK(&kobj->release, kobject_delayed_cleanup);
        schedule_delayed_work(&kobj->release, HZ);