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
  ...

1 files changed, 5 insertions, 20 deletions

diff --git a/arch/ia64/include/asm/pgtable.h b/arch/ia64/include/asm/pgtable.h
index 7935115398a6..2f07bb3dda91 100644
--- a/arch/ia64/include/asm/pgtable.h
+++ b/arch/ia64/include/asm/pgtable.h
@@ -57,9 +57,6 @@
 #define _PAGE_ED                (__IA64_UL(1) << 52)    /* exception deferral */
 #define _PAGE_PROTNONE          (__IA64_UL(1) << 63)
 
-/* Valid only for a PTE with the present bit cleared: */
-#define _PAGE_FILE              (1 << 1)                /* see swap & file pte remarks below */
-
 #define _PFN_MASK               _PAGE_PPN_MASK
 /* Mask of bits which may be changed by pte_modify(); the odd bits are there for _PAGE_PROTNONE */
 #define _PAGE_CHG_MASK  (_PAGE_P | _PAGE_PROTNONE | _PAGE_PL_MASK | _PAGE_AR_MASK | _PAGE_ED)
@@ -300,7 +297,6 @@ extern unsigned long VMALLOC_END;
 #define pte_exec(pte)           ((pte_val(pte) & _PAGE_AR_RX) != 0)
 #define pte_dirty(pte)          ((pte_val(pte) & _PAGE_D) != 0)
 #define pte_young(pte)          ((pte_val(pte) & _PAGE_A) != 0)
-#define pte_file(pte)           ((pte_val(pte) & _PAGE_FILE) != 0)
 #define pte_special(pte)        0
 
 /*
@@ -472,27 +468,16 @@ extern void paging_init (void);
  *
  * Format of swap pte:
  *      bit   0   : present bit (must be zero)
- *      bit   1   : _PAGE_FILE (must be zero)
- *      bits  2- 8: swap-type
- *      bits  9-62: swap offset
- *      bit  63   : _PAGE_PROTNONE bit
- *
- * Format of file pte:
- *      bit   0   : present bit (must be zero)
- *      bit   1   : _PAGE_FILE (must be one)
- *      bits  2-62: file_offset/PAGE_SIZE
+ *      bits  1- 7: swap-type
+ *      bits  8-62: swap offset
  *      bit  63   : _PAGE_PROTNONE bit
  */
-#define __swp_type(entry)               (((entry).val >> 2) & 0x7f)
-#define __swp_offset(entry)             (((entry).val << 1) >> 10)
-#define __swp_entry(type,offset)        ((swp_entry_t) { ((type) << 2) | ((long) (offset) << 9) })
+#define __swp_type(entry)               (((entry).val >> 1) & 0x7f)
+#define __swp_offset(entry)             (((entry).val << 1) >> 9)
+#define __swp_entry(type,offset)        ((swp_entry_t) { ((type) << 1) | ((long) (offset) << 8) })
 #define __pte_to_swp_entry(pte)         ((swp_entry_t) { pte_val(pte) })
 #define __swp_entry_to_pte(x)           ((pte_t) { (x).val })
 
-#define PTE_FILE_MAX_BITS               61
-#define pte_to_pgoff(pte)               ((pte_val(pte) << 1) >> 3)
-#define pgoff_to_pte(off)               ((pte_t) { ((off) << 2) | _PAGE_FILE })
-
 /*
  * ZERO_PAGE is a global shared page that is always zero: used
  * for zero-mapped memory areas etc..