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ref_tracker: do xarray and workqueue job initializations earlier

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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: 65b584f536 ("ref_tracker: automatically register a file in debugfs for a ref_tracker_dir")
Reported-by: kernel test robot <oliver.sang@intel.com>
Closes: https://lore.kernel.org/oe-lkp/202506251406.c28f2adb-lkp@intel.com
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Link: https://patch.msgid.link/20250626-reftrack-dbgfs-v1-1-812102e2a394@kernel.org
This commit is contained in:
Jeff Layton 2025-06-26 08:52:14 -04:00 • committed by Jakub Kicinski
parent 707bd05be7
commit f4e6aefb9c
1 changed files with 8 additions and 2 deletions
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10
lib/ref_tracker.c
View file

@ -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 */