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765a0cac56
All architectures need to provide a check_pgt_cache() function. The s390 one got lost somewhere. So reintroduce it to prevent future compile errors e.g. if Thomas Gleixner's idle loop rework patches get merged. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>