ima: measure and appraise the IMA policy itself Call ima_hash_and_process_file() to measure and appraise the IMA policy. This patch defines a new policy identifier named POLICY_CHECK. Changelog v2: - remove S_ISREG() test - add union name "hooks" to fix sparse warning Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>