arch: Add pmd_pfn() where it is missing

We need to use this function in common code, so define it for
architectures and/or configrations that miss it.  The result of
pmd_pfn() will only be used if TRANSPARENT_HUGEPAGE is enabled,
but a function or macro called pmd_pfn() must be defined, even
on machines with two level page tables.
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>

arch/alpha/include/asm/pgtable.h

@@ -233,6 +233,7 @@ pmd_page_vaddr(pmd_t pmd)
 	return ((pmd_val(pmd) & _PFN_MASK) >> (32-PAGE_SHIFT)) + PAGE_OFFSET;
 }
 
+#define pmd_pfn(pmd)	(pmd_val(pmd) >> 32)
 #define pmd_page(pmd)	(pfn_to_page(pmd_val(pmd) >> 32))
 #define pud_page(pud)	(pfn_to_page(pud_val(pud) >> 32))
 

arch/arc/include/asm/hugepage.h

@@ -31,7 +31,6 @@ static inline pmd_t pte_pmd(pte_t pte)
 
 #define pmd_write(pmd)		pte_write(pmd_pte(pmd))
 #define pmd_young(pmd)		pte_young(pmd_pte(pmd))
-#define pmd_pfn(pmd)		pte_pfn(pmd_pte(pmd))
 #define pmd_dirty(pmd)		pte_dirty(pmd_pte(pmd))
 
 #define mk_pmd(page, prot)	pte_pmd(mk_pte(page, prot))

arch/arc/include/asm/pgtable-levels.h

@@ -161,6 +161,7 @@
 #define pmd_present(x)		(pmd_val(x))
 #define pmd_clear(xp)		do { pmd_val(*(xp)) = 0; } while (0)
 #define pmd_page_vaddr(pmd)	(pmd_val(pmd) & PAGE_MASK)
+#define pmd_pfn(pmd)		((pmd_val(pmd) & PAGE_MASK) >> PAGE_SHIFT)
 #define pmd_page(pmd)		virt_to_page(pmd_page_vaddr(pmd))
 #define set_pmd(pmdp, pmd)	(*(pmdp) = pmd)
 #define pmd_pgtable(pmd)	((pgtable_t) pmd_page_vaddr(pmd))

arch/arm/include/asm/pgtable-2level.h

@@ -208,6 +208,8 @@ static inline pmd_t *pmd_offset(pud_t *pud, unsigned long addr)
 }
 #define pmd_offset pmd_offset
 
+#define pmd_pfn(pmd)		(__phys_to_pfn(pmd_val(pmd) & PHYS_MASK))
+
 #define pmd_large(pmd)		(pmd_val(pmd) & 2)
 #define pmd_leaf(pmd)		(pmd_val(pmd) & 2)
 #define pmd_bad(pmd)		(pmd_val(pmd) & 2)

arch/csky/include/asm/pgtable.h

@@ -30,6 +30,7 @@
 #define pgd_ERROR(e) \
 	pr_err("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
 
+#define pmd_pfn(pmd)	(pmd_phys(pmd) >> PAGE_SHIFT)
 #define pmd_page(pmd)	(pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT))
 #define pte_clear(mm, addr, ptep)	set_pte((ptep), \
 	(((unsigned int) addr >= PAGE_OFFSET) ? __pte(_PAGE_GLOBAL) : __pte(0)))

arch/hexagon/include/asm/pgtable.h

@@ -235,6 +235,11 @@ static inline int pmd_bad(pmd_t pmd)
 	return 0;
 }
 
+/*
+ * pmd_pfn - converts a PMD entry to a page frame number
+ */
+#define pmd_pfn(pmd)  (pmd_val(pmd) >> PAGE_SHIFT)
+
 /*
  * pmd_page - converts a PMD entry to a page pointer
  */

arch/ia64/include/asm/pgtable.h

@@ -267,6 +267,7 @@ ia64_phys_addr_valid (unsigned long addr)
 #define pmd_present(pmd)		(pmd_val(pmd) != 0UL)
 #define pmd_clear(pmdp)			(pmd_val(*(pmdp)) = 0UL)
 #define pmd_page_vaddr(pmd)		((unsigned long) __va(pmd_val(pmd) & _PFN_MASK))
+#define pmd_pfn(pmd)			((pmd_val(pmd) & _PFN_MASK) >> PAGE_SHIFT)
 #define pmd_page(pmd)			virt_to_page((pmd_val(pmd) + PAGE_OFFSET))
 
 #define pud_none(pud)			(!pud_val(pud))

arch/m68k/include/asm/mcf_pgtable.h

@@ -322,6 +322,7 @@ extern pgd_t kernel_pg_dir[PTRS_PER_PGD];
 #define __pte_to_swp_entry(pte)	((swp_entry_t) { pte_val(pte) })
 #define __swp_entry_to_pte(x)	(__pte((x).val))
 
+#define pmd_pfn(pmd)		(pmd_val(pmd) >> PAGE_SHIFT)
 #define pmd_page(pmd)		(pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT))
 
 #define pfn_pte(pfn, prot)	__pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot))

arch/m68k/include/asm/motorola_pgtable.h

@@ -147,6 +147,7 @@ static inline void pud_set(pud_t *pudp, pmd_t *pmdp)
 #define pmd_present(pmd)	(pmd_val(pmd) & _PAGE_TABLE)
 #define pmd_clear(pmdp)		({ pmd_val(*pmdp) = 0; })
 
+#define pmd_pfn(pmd)		((pmd_val(pmd) & _TABLE_MASK) >> PAGE_SHIFT)
 /*
  * m68k does not have huge pages (020/030 actually could), but generic code
  * expects pmd_page() to exists, only to then DCE it all. Provide a dummy to

arch/m68k/include/asm/sun3_pgtable.h

@@ -130,6 +130,7 @@ static inline void pte_clear (struct mm_struct *mm, unsigned long addr, pte_t *p
 ({ pte_t __pte; pte_val(__pte) = pfn | pgprot_val(pgprot); __pte; })
 
 #define pte_page(pte)		virt_to_page(__pte_page(pte))
+#define pmd_pfn(pmd)		(pmd_val(pmd) >> PAGE_SHIFT)
 #define pmd_page(pmd)		virt_to_page(pmd_page_vaddr(pmd))
 
 

arch/microblaze/include/asm/pgtable.h

@@ -399,6 +399,9 @@ static inline unsigned long pmd_page_vaddr(pmd_t pmd)
 	return ((unsigned long) (pmd_val(pmd) & PAGE_MASK));
 }
 
+/* returns pfn of the pmd entry*/
+#define pmd_pfn(pmd)	(__pa(pmd_val(pmd)) >> PAGE_SHIFT)
+
 /* returns struct *page of the pmd entry*/
 #define pmd_page(pmd)	(pfn_to_page(__pa(pmd_val(pmd)) >> PAGE_SHIFT))
 

arch/nds32/include/asm/pgtable.h

@@ -308,6 +308,7 @@ static inline pmd_t __mk_pmd(pte_t * ptep, unsigned long prot)
 	return pmd;
 }
 
+#define pmd_pfn(pmd)	     (pmd_val(pmd) >> PAGE_SHIFT)
 #define pmd_page(pmd)        virt_to_page(__va(pmd_val(pmd)))
 
 /*

arch/nios2/include/asm/pgtable.h

@@ -235,6 +235,7 @@ static inline void pte_clear(struct mm_struct *mm,
  * and a page entry and page directory to the page they refer to.
  */
 #define pmd_phys(pmd)		virt_to_phys((void *)pmd_val(pmd))
+#define pmd_pfn(pmd)		(pmd_phys(pmd) >> PAGE_SHIFT)
 #define pmd_page(pmd)		(pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT))
 
 static inline unsigned long pmd_page_vaddr(pmd_t pmd)

arch/openrisc/include/asm/pgtable.h

@@ -361,6 +361,7 @@ static inline void pmd_set(pmd_t *pmdp, pte_t *ptep)
 	pmd_val(*pmdp) = _KERNPG_TABLE | (unsigned long) ptep;
 }
 
+#define pmd_pfn(pmd)		(pmd_val(pmd) >> PAGE_SHIFT)
 #define pmd_page(pmd)		(pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT))
 
 static inline unsigned long pmd_page_vaddr(pmd_t pmd)

arch/parisc/include/asm/pgtable.h

@@ -405,6 +405,7 @@ static inline unsigned long pmd_page_vaddr(pmd_t pmd)
 	return ((unsigned long) __va(pmd_address(pmd)));
 }
 
+#define pmd_pfn(pmd)	(pmd_address(pmd) >> PAGE_SHIFT)
 #define __pmd_page(pmd) ((unsigned long) __va(pmd_address(pmd)))
 #define pmd_page(pmd)	virt_to_page((void *)__pmd_page(pmd))
 

arch/sh/include/asm/pgtable_32.h

@@ -406,6 +406,7 @@ static inline unsigned long pmd_page_vaddr(pmd_t pmd)
 	return (unsigned long)pmd_val(pmd);
 }
 
+#define pmd_pfn(pmd)		(__pa(pmd_val(pmd)) >> PAGE_SHIFT)
 #define pmd_page(pmd)		(virt_to_page(pmd_val(pmd)))
 
 #ifdef CONFIG_X2TLB

arch/um/include/asm/pgtable.h

@@ -109,6 +109,7 @@ extern unsigned long end_iomem;
 #define p4d_newpage(x)  (p4d_val(x) & _PAGE_NEWPAGE)
 #define p4d_mkuptodate(x) (p4d_val(x) &= ~_PAGE_NEWPAGE)
 
+#define pmd_pfn(pmd) (pmd_val(pmd) >> PAGE_SHIFT)
 #define pmd_page(pmd) phys_to_page(pmd_val(pmd) & PAGE_MASK)
 
 #define pte_page(x) pfn_to_page(pte_pfn(x))

arch/xtensa/include/asm/pgtable.h

@@ -241,6 +241,7 @@ static inline void paging_init(void) { }
  * The pmd contains the kernel virtual address of the pte page.
  */
 #define pmd_page_vaddr(pmd) ((unsigned long)(pmd_val(pmd) & PAGE_MASK))
+#define pmd_pfn(pmd) (__pa(pmd_val(pmd)) >> PAGE_SHIFT)
 #define pmd_page(pmd) virt_to_page(pmd_val(pmd))
 
 /*