Merge branch 'akpm' (patches from Andrew)

Merge updates from Andrew Morton:

 - a few hot fixes

 - ocfs2 updates

 - almost all of -mm (slab-generic, slab, slub, kmemleak, kasan,
   cleanups, debug, pagecache, memcg, gup, pagemap, memory-hotplug,
   sparsemem, vmalloc, initialization, z3fold, compaction, mempolicy,
   oom-kill, hugetlb, migration, thp, mmap, madvise, shmem, zswap,
   zsmalloc)

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (132 commits)
  mm/zsmalloc.c: fix a -Wunused-function warning
  zswap: do not map same object twice
  zswap: use movable memory if zpool support allocate movable memory
  zpool: add malloc_support_movable to zpool_driver
  shmem: fix obsolete comment in shmem_getpage_gfp()
  mm/madvise: reduce code duplication in error handling paths
  mm: mmap: increase sockets maximum memory size pgoff for 32bits
  mm/mmap.c: refine find_vma_prev() with rb_last()
  riscv: make mmap allocation top-down by default
  mips: use generic mmap top-down layout and brk randomization
  mips: replace arch specific way to determine 32bit task with generic version
  mips: adjust brk randomization offset to fit generic version
  mips: use STACK_TOP when computing mmap base address
  mips: properly account for stack randomization and stack guard gap
  arm: use generic mmap top-down layout and brk randomization
  arm: use STACK_TOP when computing mmap base address
  arm: properly account for stack randomization and stack guard gap
  arm64, mm: make randomization selected by generic topdown mmap layout
  arm64, mm: move generic mmap layout functions to mm
  arm64: consider stack randomization for mmap base only when necessary
  ...

arch/sparc/include/asm/pgalloc_32.h

@@ -17,8 +17,6 @@ void srmmu_free_nocache(void *addr, int size);
 
 extern struct resource sparc_iomap;
 
-#define check_pgt_cache()	do { } while (0)
-
 pgd_t *get_pgd_fast(void);
 static inline void free_pgd_fast(pgd_t *pgd)
 {

arch/sparc/include/asm/pgalloc_64.h

@@ -69,8 +69,6 @@ void pte_free(struct mm_struct *mm, pgtable_t ptepage);
 #define pmd_populate(MM, PMD, PTE)		pmd_set(MM, PMD, PTE)
 #define pmd_pgtable(PMD)			((pte_t *)__pmd_page(PMD))
 
-#define check_pgt_cache()	do { } while (0)
-
 void pgtable_free(void *table, bool is_page);
 
 #ifdef CONFIG_SMP

arch/sparc/include/asm/pgtable_32.h

@@ -445,9 +445,4 @@ static inline int io_remap_pfn_range(struct vm_area_struct *vma,
 /* We provide our own get_unmapped_area to cope with VA holes for userland */
 #define HAVE_ARCH_UNMAPPED_AREA
 
-/*
- * No page table caches to initialise
- */
-#define pgtable_cache_init()	do { } while (0)
-
 #endif /* !(_SPARC_PGTABLE_H) */

arch/sparc/include/asm/pgtable_64.h

@@ -1135,7 +1135,6 @@ unsigned long get_fb_unmapped_area(struct file *filp, unsigned long,
 				   unsigned long);
 #define HAVE_ARCH_FB_UNMAPPED_AREA
 
-void pgtable_cache_init(void);
 void sun4v_register_fault_status(void);
 void sun4v_ktsb_register(void);
 void __init cheetah_ecache_flush_init(void);

arch/sparc/mm/init_32.c

@@ -31,7 +31,6 @@
 #include <asm/page.h>
 #include <asm/pgtable.h>
 #include <asm/vaddrs.h>
-#include <asm/pgalloc.h>	/* bug in asm-generic/tlb.h: check_pgt_cache */
 #include <asm/setup.h>
 #include <asm/tlb.h>
 #include <asm/prom.h>