From 044003b52a78bcbda7103633c351da16505096cf Mon Sep 17 00:00:00 2001
From: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Date: Tue, 29 May 2018 19:58:39 +0530
Subject: [PATCH] powerpc/mm/radix: Move function from radix.h to
 pgtable-radix.c
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References: bsc#1055117
Patch-mainline: v4.18-rc1
Git-commit: 044003b52a78bcbda7103633c351da16505096cf

In later patch we will update them which require them to be moved
to pgtable-radix.c. Keeping the function in radix.h results in
compile warning as below.

./arch/powerpc/include/asm/book3s/64/radix.h: In function ‘radix__ptep_set_access_flags’:
./arch/powerpc/include/asm/book3s/64/radix.h:196:28: error: dereferencing pointer to incomplete type ‘struct vm_area_struct’
  struct mm_struct *mm = vma->vm_mm;
                            ^~
./arch/powerpc/include/asm/book3s/64/radix.h:204:6: error: implicit declaration of function ‘atomic_read’; did you mean ‘__atomic_load’? [-Werror=implicit-function-declaration]
      atomic_read(&mm->context.copros) > 0) {
      ^~~~~~~~~~~
      __atomic_load
./arch/powerpc/include/asm/book3s/64/radix.h:204:21: error: dereferencing pointer to incomplete type ‘struct mm_struct’
      atomic_read(&mm->context.copros) > 0) {

Instead of fixing header dependencies, we move the function to pgtable-radix.c
Also the function is now large to be a static inline . Doing the
move in separate patch helps in review.

No functional change in this patch. Only code movement.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Michal Suchanek <msuchanek@suse.de>
---
 arch/powerpc/include/asm/book3s/64/radix.h | 31 +++-------------------
 arch/powerpc/mm/pgtable-radix.c            | 22 +++++++++++++++
 2 files changed, 25 insertions(+), 28 deletions(-)

--- a/arch/powerpc/include/asm/book3s/64/radix.h
+++ b/arch/powerpc/include/asm/book3s/64/radix.h
@@ -122,6 +122,9 @@
 extern void radix__mark_rodata_ro(void);
 #endif
 
+extern void radix__ptep_set_access_flags(struct mm_struct *mm, pte_t *ptep,
+					 pte_t entry, unsigned long address);
+
 static inline unsigned long __radix_pte_update(pte_t *ptep, unsigned long clr,
 					       unsigned long set)
 {
@@ -188,34 +191,6 @@ static inline pte_t radix__ptep_get_and_
 	return __pte(old_pte);
 }
 
-/*
- * Set the dirty and/or accessed bits atomically in a linux PTE, this
- * function doesn't need to invalidate tlb.
- */
-static inline void radix__ptep_set_access_flags(struct mm_struct *mm,
-						pte_t *ptep, pte_t entry,
-						unsigned long address)
-{
-
-	unsigned long set = pte_val(entry) & (_PAGE_DIRTY | _PAGE_ACCESSED |
-					      _PAGE_RW | _PAGE_EXEC);
-
-	if (cpu_has_feature(CPU_FTR_POWER9_DD1)) {
-
-		unsigned long old_pte, new_pte;
-
-		old_pte = __radix_pte_update(ptep, ~0, 0);
-		/*
-		 * new value of pte
-		 */
-		new_pte = old_pte | set;
-		radix__flush_tlb_pte_p9_dd1(old_pte, mm, address);
-		__radix_pte_update(ptep, 0, new_pte);
-	} else
-		__radix_pte_update(ptep, 0, set);
-	asm volatile("ptesync" : : : "memory");
-}
-
 static inline int radix__pte_same(pte_t pte_a, pte_t pte_b)
 {
 	return ((pte_raw(pte_a) ^ pte_raw(pte_b)) == 0);
--- a/arch/powerpc/mm/pgtable-radix.c
+++ b/arch/powerpc/mm/pgtable-radix.c
@@ -1004,3 +1004,25 @@ int radix__has_transparent_hugepage(void
 	return 0;
 }
 #endif /* CONFIG_TRANSPARENT_HUGEPAGE */
+
+void radix__ptep_set_access_flags(struct mm_struct *mm,
+				  pte_t *ptep, pte_t entry,
+				  unsigned long address)
+{
+	unsigned long set = pte_val(entry) & (_PAGE_DIRTY | _PAGE_ACCESSED |
+					      _PAGE_RW | _PAGE_EXEC);
+
+	if (cpu_has_feature(CPU_FTR_POWER9_DD1)) {
+		unsigned long old_pte, new_pte;
+
+		old_pte = __radix_pte_update(ptep, ~0, 0);
+		/*
+		 * new value of pte
+		 */
+		new_pte = old_pte | set;
+		radix__flush_tlb_pte_p9_dd1(old_pte, mm, address);
+		__radix_pte_update(ptep, 0, new_pte);
+	} else
+		__radix_pte_update(ptep, 0, set);
+	asm volatile("ptesync" : : : "memory");
+}