[MM]: Add set_pte_at() which takes 'mm' and 'addr' args.

I'm taking a slightly different approach this time around so things
are easier to integrate.  Here is the first patch which builds the
infrastructure.  Basically:

1) Add set_pte_at() which is set_pte() with 'mm' and 'addr' arguments
   added.  All generic code uses set_pte_at().

   Most platforms simply get this define:
	#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)

   I chose this method over simply changing all set_pte() call sites
   because many platforms implement this in assembler and it would
   take forever to preserve the build and stabilize things if modifying
   that was necessary.

   Soon, with platform maintainer's help, we can kill of set_pte() entirely.
   To be honest, there are only a handful of set_pte() call sites in the
   arch specific code.

   Actually, in this patch ppc64 is completely set_pte() free and does not
   define it.

2) pte_clear() gets 'mm' and 'addr' arguments now.
   This had a cascading effect on many ptep_test_and_*() routines.  Specifically:
   a) ptep_test_and_clear_{young,dirty}() now take 'vma' and 'address' args.
   b) ptep_get_and_clear now take 'mm' and 'address' args.
   c) ptep_mkdirty was deleted, unused by any code.
   d) ptep_set_wrprotect now takes 'mm' and 'address' args.

I've tested this patch as follows:

1) compile and run tested on sparc64/SMP
2) compile tested on:
   a) ppc64/SMP
   b) i386 both with and without PAE enabled

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 10 deletions

diff --git a/include/asm-m32r/pgtable.h b/include/asm-m32r/pgtable.h
index d2b67741e381..1710d91d4e56 100644
--- a/include/asm-m32r/pgtable.h
+++ b/include/asm-m32r/pgtable.h
@@ -176,7 +176,7 @@ extern unsigned long empty_zero_page[1024];
 /* page table for 0-4MB for everybody */
 
 #define pte_present(x)	(pte_val(x) & (_PAGE_PRESENT | _PAGE_PROTNONE))
-#define pte_clear(xp)	do { set_pte(xp, __pte(0)); } while (0)
+#define pte_clear(mm,addr,xp)	do { set_pte_at(mm, addr, xp, __pte(0)); } while (0)
 
 #define pmd_none(x)	(!pmd_val(x))
 #define pmd_present(x)	(pmd_val(x) & _PAGE_PRESENT)
@@ -282,26 +282,21 @@ static inline pte_t pte_mkwrite(pte_t pte)
 	return pte;
 }
 
-static inline  int ptep_test_and_clear_dirty(pte_t *ptep)
+static inline  int ptep_test_and_clear_dirty(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep)
 {
 	return test_and_clear_bit(_PAGE_BIT_DIRTY, ptep);
 }
 
-static inline  int ptep_test_and_clear_young(pte_t *ptep)
+static inline  int ptep_test_and_clear_young(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep)
 {
 	return test_and_clear_bit(_PAGE_BIT_ACCESSED, ptep);
 }
 
-static inline void ptep_set_wrprotect(pte_t *ptep)
+static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
 {
 	clear_bit(_PAGE_BIT_WRITE, ptep);
 }
 
-static inline void ptep_mkdirty(pte_t *ptep)
-{
-	set_bit(_PAGE_BIT_DIRTY, ptep);
-}
-
 /*
  * Macro and implementation to make a page protection as uncachable.
  */
@@ -390,7 +385,6 @@ static inline void pmd_set(pmd_t * pmdp, pte_t * ptep)
 #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY
 #define __HAVE_ARCH_PTEP_GET_AND_CLEAR
 #define __HAVE_ARCH_PTEP_SET_WRPROTECT
-#define __HAVE_ARCH_PTEP_MKDIRTY
 #define __HAVE_ARCH_PTE_SAME
 #include <asm-generic/pgtable.h>