Merge branch 'akpm' (patches from Andrew)

Merge misc updates from Andrew Morton:
 "Bite-sized chunks this time, to avoid the MTA ratelimiting woes.

   - fs/notify updates

   - ocfs2

   - some of MM"

That laconic "some MM" is mainly the removal of remap_file_pages(),
which is a big simplification of the VM, and which gets rid of a *lot*
of random cruft and special cases because we no longer support the
non-linear mappings that it used.

From a user interface perspective, nothing has changed, because the
remap_file_pages() syscall still exists, it's just done by emulating the
old behavior by creating a lot of individual small mappings instead of
one non-linear one.

The emulation is slower than the old "native" non-linear mappings, but
nobody really uses or cares about remap_file_pages(), and simplifying
the VM is a big advantage.

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (78 commits)
  memcg: zap memcg_slab_caches and memcg_slab_mutex
  memcg: zap memcg_name argument of memcg_create_kmem_cache
  memcg: zap __memcg_{charge,uncharge}_slab
  mm/page_alloc.c: place zone_id check before VM_BUG_ON_PAGE check
  mm: hugetlb: fix type of hugetlb_treat_as_movable variable
  mm, hugetlb: remove unnecessary lower bound on sysctl handlers"?
  mm: memory: merge shared-writable dirtying branches in do_wp_page()
  mm: memory: remove ->vm_file check on shared writable vmas
  xtensa: drop _PAGE_FILE and pte_file()-related helpers
  x86: drop _PAGE_FILE and pte_file()-related helpers
  unicore32: drop pte_file()-related helpers
  um: drop _PAGE_FILE and pte_file()-related helpers
  tile: drop pte_file()-related helpers
  sparc: drop pte_file()-related helpers
  sh: drop _PAGE_FILE and pte_file()-related helpers
  score: drop _PAGE_FILE and pte_file()-related helpers
  s390: drop pte_file()-related helpers
  parisc: drop _PAGE_FILE and pte_file()-related helpers
  openrisc: drop _PAGE_FILE and pte_file()-related helpers
  nios2: drop _PAGE_FILE and pte_file()-related helpers
  ...

4 files changed, 2 insertions, 53 deletions

diff --git a/arch/m68k/include/asm/mcf_pgtable.h b/arch/m68k/include/asm/mcf_pgtable.h
index 3c793682e5d9..2500ce04fcc4 100644
--- a/arch/m68k/include/asm/mcf_pgtable.h
+++ b/arch/m68k/include/asm/mcf_pgtable.h
@@ -35,7 +35,6 @@
  * hitting hardware.
  */
 #define CF_PAGE_DIRTY           0x00000001
-#define CF_PAGE_FILE            0x00000200
 #define CF_PAGE_ACCESSED        0x00001000
 
 #define _PAGE_CACHE040          0x020   /* 68040 cache mode, cachable, copyback */
@@ -243,11 +242,6 @@ static inline int pte_young(pte_t pte)
         return pte_val(pte) & CF_PAGE_ACCESSED;
 }
 
-static inline int pte_file(pte_t pte)
-{
-        return pte_val(pte) & CF_PAGE_FILE;
-}
-
 static inline int pte_special(pte_t pte)
 {
         return 0;
@@ -391,26 +385,13 @@ static inline void cache_page(void *vaddr)
         *ptep = pte_mkcache(*ptep);
 }
 
-#define PTE_FILE_MAX_BITS       21
-#define PTE_FILE_SHIFT          11
-
-static inline unsigned long pte_to_pgoff(pte_t pte)
-{
-        return pte_val(pte) >> PTE_FILE_SHIFT;
-}
-
-static inline pte_t pgoff_to_pte(unsigned pgoff)
-{
-        return __pte((pgoff << PTE_FILE_SHIFT) + CF_PAGE_FILE);
-}
-
 /*
  * Encode and de-code a swap entry (must be !pte_none(e) && !pte_present(e))
  */
 #define __swp_type(x)           ((x).val & 0xFF)
-#define __swp_offset(x)         ((x).val >> PTE_FILE_SHIFT)
+#define __swp_offset(x)         ((x).val >> 11)
 #define __swp_entry(typ, off)   ((swp_entry_t) { (typ) | \
-                                        (off << PTE_FILE_SHIFT) })
+                                        (off << 11) })
 #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
 #define __swp_entry_to_pte(x)   (__pte((x).val))
 
diff --git a/arch/m68k/include/asm/motorola_pgtable.h b/arch/m68k/include/asm/motorola_pgtable.h
index e0fdd4d08075..0085aab80e5a 100644
--- a/arch/m68k/include/asm/motorola_pgtable.h
+++ b/arch/m68k/include/asm/motorola_pgtable.h
@@ -28,7 +28,6 @@
 #define _PAGE_CHG_MASK  (PAGE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_NOCACHE)
 
 #define _PAGE_PROTNONE  0x004
-#define _PAGE_FILE      0x008   /* pagecache or swap? */
 
 #ifndef __ASSEMBLY__
 
@@ -168,7 +167,6 @@ static inline void pgd_set(pgd_t *pgdp, pmd_t *pmdp)
 static inline int pte_write(pte_t pte)          { return !(pte_val(pte) & _PAGE_RONLY); }
 static inline int pte_dirty(pte_t pte)          { return pte_val(pte) & _PAGE_DIRTY; }
 static inline int pte_young(pte_t pte)          { return pte_val(pte) & _PAGE_ACCESSED; }
-static inline int pte_file(pte_t pte)           { return pte_val(pte) & _PAGE_FILE; }
 static inline int pte_special(pte_t pte)        { return 0; }
 
 static inline pte_t pte_wrprotect(pte_t pte)    { pte_val(pte) |= _PAGE_RONLY; return pte; }
@@ -266,19 +264,6 @@ static inline void cache_page(void *vaddr)
         }
 }
 
-#define PTE_FILE_MAX_BITS       28
-
-static inline unsigned long pte_to_pgoff(pte_t pte)
-{
-        return pte.pte >> 4;
-}
-
-static inline pte_t pgoff_to_pte(unsigned off)
-{
-        pte_t pte = { (off << 4) + _PAGE_FILE };
-        return pte;
-}
-
 /* Encode and de-code a swap entry (must be !pte_none(e) && !pte_present(e)) */
 #define __swp_type(x)           (((x).val >> 4) & 0xff)
 #define __swp_offset(x)         ((x).val >> 12)
diff --git a/arch/m68k/include/asm/pgtable_no.h b/arch/m68k/include/asm/pgtable_no.h
index 11859b86b1f9..ac7d87a02335 100644
--- a/arch/m68k/include/asm/pgtable_no.h
+++ b/arch/m68k/include/asm/pgtable_no.h
@@ -37,8 +37,6 @@ extern void paging_init(void);
 #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
 #define __swp_entry_to_pte(x)   ((pte_t) { (x).val })
 
-static inline int pte_file(pte_t pte) { return 0; }
-
 /*
  * ZERO_PAGE is a global shared page that is always zero: used
  * for zero-mapped memory areas etc..
diff --git a/arch/m68k/include/asm/sun3_pgtable.h b/arch/m68k/include/asm/sun3_pgtable.h
index f55aa04161e8..48657f9fdece 100644
--- a/arch/m68k/include/asm/sun3_pgtable.h
+++ b/arch/m68k/include/asm/sun3_pgtable.h
@@ -38,8 +38,6 @@
 #define _PAGE_PRESENT   (SUN3_PAGE_VALID)
 #define _PAGE_ACCESSED  (SUN3_PAGE_ACCESSED)
 
-#define PTE_FILE_MAX_BITS 28
-
 /* Compound page protection values. */
 //todo: work out which ones *should* have SUN3_PAGE_NOCACHE and fix...
 // is it just PAGE_KERNEL and PAGE_SHARED?
@@ -168,7 +166,6 @@ static inline void pgd_clear (pgd_t *pgdp) {}
 static inline int pte_write(pte_t pte)          { return pte_val(pte) & SUN3_PAGE_WRITEABLE; }
 static inline int pte_dirty(pte_t pte)          { return pte_val(pte) & SUN3_PAGE_MODIFIED; }
 static inline int pte_young(pte_t pte)          { return pte_val(pte) & SUN3_PAGE_ACCESSED; }
-static inline int pte_file(pte_t pte)           { return pte_val(pte) & SUN3_PAGE_ACCESSED; }
 static inline int pte_special(pte_t pte)        { return 0; }
 
 static inline pte_t pte_wrprotect(pte_t pte)    { pte_val(pte) &= ~SUN3_PAGE_WRITEABLE; return pte; }
@@ -202,18 +199,6 @@ static inline pmd_t *pmd_offset (pgd_t *pgd, unsigned long address)
         return (pmd_t *) pgd;
 }
 
-static inline unsigned long pte_to_pgoff(pte_t pte)
-{
-        return pte.pte & SUN3_PAGE_PGNUM_MASK;
-}
-
-static inline pte_t pgoff_to_pte(unsigned off)
-{
-        pte_t pte = { off + SUN3_PAGE_ACCESSED };
-        return pte;
-}
-
-
 /* Find an entry in the third-level pagetable. */
 #define pte_index(address) ((address >> PAGE_SHIFT) & (PTRS_PER_PTE-1))
 #define pte_offset_kernel(pmd, address) ((pte_t *) __pmd_page(*pmd) + pte_index(address))