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The debugfs_create_dir function returns ERR_PTR in case of error, and the only correct way to check if an error occurred is 'IS_ERR' inline function. This patch will replace the null-comparison with IS_ERR. Signed-off-by: Anup Sharma <anupnewsmail@gmail.com> Suggested-by: Ivan Orlov <ivan.orlov0322@gmail.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>