LoongArch: Fix the !THP build

Fix the !THP build by making pmd_pfn() available in all configurations.
Because pmd_pfn() is used in mm/page_vma_mapped.c whether or not THP is
configured.

Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

diff --git a/arch/loongarch/include/asm/pgtable.h b/arch/loongarch/include/asm/pgtable.h
index 5dc84d8..d9e86cf 100644 (file)
--- a/arch/loongarch/include/asm/pgtable.h
+++ b/arch/loongarch/include/asm/pgtable.h
@@ -426,6 +426,11 @@ static inline void update_mmu_cache_pmd(struct vm_area_struct *vma,
 
 #define kern_addr_valid(addr)  (1)
 
+static inline unsigned long pmd_pfn(pmd_t pmd)
+{
+       return (pmd_val(pmd) & _PFN_MASK) >> _PFN_SHIFT;
+}
+
 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
 
 /* We don't have hardware dirty/accessed bits, generic_pmdp_establish is fine.*/
@@ -497,11 +502,6 @@ static inline pmd_t pmd_mkyoung(pmd_t pmd)
        return pmd;
 }
 
-static inline unsigned long pmd_pfn(pmd_t pmd)
-{
-       return (pmd_val(pmd) & _PFN_MASK) >> _PFN_SHIFT;
-}
-
 static inline struct page *pmd_page(pmd_t pmd)
 {
        if (pmd_trans_huge(pmd))