[PATCH v2 16/46] hugetlb: make default arch_make_huge_pte understand small mappings

[James Houghton]

This is a simple change: don't create a "huge" PTE if we are making a
regular, PAGE_SIZE PTE. All architectures that want to implement HGM
likely need to be changed in a similar way if they implement their own
version of arch_make_huge_pte.

Signed-off-by: James Houghton <jthoughton@xxxxxxxxxx>

diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index 726d581158b1..b767b6889dea 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -899,7 +899,7 @@ static inline void arch_clear_hugepage_flags(struct page *page) { }
 static inline pte_t arch_make_huge_pte(pte_t entry, unsigned int shift,
 				       vm_flags_t flags)
 {
-	return pte_mkhuge(entry);
+	return shift > PAGE_SHIFT ? pte_mkhuge(entry) : entry;
 }
 #endif
 
-- 
2.39.2.637.g21b0678d19-goog