[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, 2 insertions, 1 deletions

diff --git a/include/asm-m32r/pgtable-2level.h b/include/asm-m32r/pgtable-2level.h
index 8af66284b436..861727c20e8f 100644
--- a/include/asm-m32r/pgtable-2level.h
+++ b/include/asm-m32r/pgtable-2level.h
@@ -44,6 +44,7 @@ static inline int pgd_present(pgd_t pgd)	{ return 1; }
  * hook is made available.
  */
 #define set_pte(pteptr, pteval) (*(pteptr) = pteval)
+#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)
 #define set_pte_atomic(pteptr, pteval)	set_pte(pteptr, pteval)
 /*
  * (pmds are folded into pgds so this doesnt get actually called,
@@ -60,7 +61,7 @@ static inline pmd_t *pmd_offset(pgd_t * dir, unsigned long address)
 	return (pmd_t *) dir;
 }
 
-#define ptep_get_and_clear(xp)	__pte(xchg(&(xp)->pte, 0))
+#define ptep_get_and_clear(mm,addr,xp)	__pte(xchg(&(xp)->pte, 0))
 #define pte_same(a, b)		(pte_val(a) == pte_val(b))
 #define pte_page(x)		pfn_to_page(pte_pfn(x))
 #define pte_none(x)		(!pte_val(x))