Commit f4e6aefb authored by Jeff Layton's avatar Jeff Layton Committed by Jakub Kicinski
Browse files

ref_tracker: do xarray and workqueue job initializations earlier 



The kernel test robot reported an oops that occurred when attempting to
deregister a dentry from the xarray during subsys_initcall().

The ref_tracker xarrays and workqueue job are being initialized in
late_initcall() which is too late. Move those to postcore_initcall()
instead.

Fixes: 65b584f5 ("ref_tracker: automatically register a file in debugfs for a ref_tracker_dir")
Reported-by: default avatarkernel test robot <oliver.sang@intel.com>
Closes: https://lore.kernel.org/oe-lkp/202506251406.c28f2adb-lkp@intel.com


Signed-off-by: default avatarJeff Layton <jlayton@kernel.org>
Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
Link: https://patch.msgid.link/20250626-reftrack-dbgfs-v1-1-812102e2a394@kernel.org
parent 707bd05b

lib/ref_tracker.c

+8 −2
Original line number Diff line number Diff line
@@ -516,13 +516,19 @@ static void debugfs_reap_work(struct work_struct *work) 
	} while (reaped);

}



static int __init ref_tracker_debugfs_init(void)

static int __init ref_tracker_debugfs_postcore_init(void)

{

	INIT_WORK(&debugfs_reap_worker, debugfs_reap_work);

	xa_init_flags(&debugfs_dentries, XA_FLAGS_LOCK_IRQ);

	xa_init_flags(&debugfs_symlinks, XA_FLAGS_LOCK_IRQ);

	return 0;

}

postcore_initcall(ref_tracker_debugfs_postcore_init);



static int __init ref_tracker_debugfs_late_init(void)

{

	ref_tracker_debug_dir = debugfs_create_dir("ref_tracker", NULL);

	return 0;

}

late_initcall(ref_tracker_debugfs_init);

late_initcall(ref_tracker_debugfs_late_init);

#endif /* CONFIG_DEBUG_FS */