x86: CPA: remove BUG_ON for LRU/Compound pages

New implementation does not use lru for anything so there is no need
to reject pages that are in the LRU. Similar for compound pages (which
were checked because they also use page->lru)

[ tglx@linutronix.de: removed unused variable ]
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>

arch/x86/mm/pageattr.c

@@ -513,7 +513,6 @@ static int __change_page_attr(struct cpa_data *cpa, int primary)
 	unsigned long address = cpa->vaddr;
 	int do_split, err;
 	unsigned int level;
-	struct page *kpte_page;
 	pte_t *kpte, old_pte;
 
 repeat:
@@ -532,10 +531,6 @@ static int __change_page_attr(struct cpa_data *cpa, int primary)
 		return -EINVAL;
 	}
 
-	kpte_page = virt_to_page(kpte);
-	BUG_ON(PageLRU(kpte_page));
-	BUG_ON(PageCompound(kpte_page));
-
 	if (level == PG_LEVEL_4K) {
 		pte_t new_pte;
 		pgprot_t new_prot = pte_pgprot(old_pte);