35 files changed, 206 insertions, 108 deletions

diff --git a/mm/Makefile b/mm/Makefile
index 7a68d2ab556..6c2a73a54a4 100644
--- a/mm/Makefile
+++ b/mm/Makefile
@@ -33,7 +33,11 @@ obj-$(CONFIG_FAILSLAB) += failslab.o
 obj-$(CONFIG_MEMORY_HOTPLUG) += memory_hotplug.o
 obj-$(CONFIG_FS_XIP) += filemap_xip.o
 obj-$(CONFIG_MIGRATION) += migrate.o
-obj-$(CONFIG_SMP) += percpu.o
+ifdef CONFIG_SMP
+obj-y += percpu.o
+else
+obj-y += percpu_up.o
+endif
 obj-$(CONFIG_QUICKLIST) += quicklist.o
 obj-$(CONFIG_CGROUP_MEM_RES_CTLR) += memcontrol.o page_cgroup.o
 obj-$(CONFIG_MEMORY_FAILURE) += memory-failure.o
diff --git a/mm/bootmem.c b/mm/bootmem.c
index d7c791ef003..eff22422057 100644
--- a/mm/bootmem.c
+++ b/mm/bootmem.c
@@ -10,6 +10,7 @@
  */
 #include <linux/init.h>
 #include <linux/pfn.h>
+#include <linux/slab.h>
 #include <linux/bootmem.h>
 #include <linux/module.h>
 #include <linux/kmemleak.h>
@@ -180,19 +181,12 @@ static void __init __free_pages_memory(unsigned long start, unsigned long end)
 	end_aligned = end & ~(BITS_PER_LONG - 1);
 
 	if (end_aligned <= start_aligned) {
-#if 1
-		printk(KERN_DEBUG " %lx - %lx\n", start, end);
-#endif
 		for (i = start; i < end; i++)
 			__free_pages_bootmem(pfn_to_page(i), 0);
 
 		return;
 	}
 
-#if 1
-	printk(KERN_DEBUG " %lx %lx - %lx %lx\n",
-		 start, start_aligned, end_aligned, end);
-#endif
 	for (i = start; i < start_aligned; i++)
 		__free_pages_bootmem(pfn_to_page(i), 0);
 
@@ -428,9 +422,6 @@ void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
 {
 #ifdef CONFIG_NO_BOOTMEM
 	free_early(physaddr, physaddr + size);
-#if 0
-	printk(KERN_DEBUG "free %lx %lx\n", physaddr, size);
-#endif
 #else
 	unsigned long start, end;
 
@@ -456,9 +447,6 @@ void __init free_bootmem(unsigned long addr, unsigned long size)
 {
 #ifdef CONFIG_NO_BOOTMEM
 	free_early(addr, addr + size);
-#if 0
-	printk(KERN_DEBUG "free %lx %lx\n", addr, size);
-#endif
 #else
 	unsigned long start, end;
 
diff --git a/mm/bounce.c b/mm/bounce.c
index a2b76a588e3..13b6dad1eed 100644
--- a/mm/bounce.c
+++ b/mm/bounce.c
@@ -6,6 +6,7 @@
 #include <linux/mm.h>
 #include <linux/module.h>
 #include <linux/swap.h>
+#include <linux/gfp.h>
 #include <linux/bio.h>
 #include <linux/pagemap.h>
 #include <linux/mempool.h>
diff --git a/mm/failslab.c b/mm/failslab.c
index bb41f98dd8b..c5f88f240dd 100644
--- a/mm/failslab.c
+++ b/mm/failslab.c
@@ -1,5 +1,4 @@
 #include <linux/fault-inject.h>
-#include <linux/gfp.h>
 #include <linux/slab.h>
 
 static struct {
diff --git a/mm/filemap.c b/mm/filemap.c
index 045b31c3765..140ebda9640 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -10,13 +10,13 @@
  * the NFS filesystem used to do this differently, for example)
  */
 #include <linux/module.h>
-#include <linux/slab.h>
 #include <linux/compiler.h>
 #include <linux/fs.h>
 #include <linux/uaccess.h>
 #include <linux/aio.h>
 #include <linux/capability.h>
 #include <linux/kernel_stat.h>
+#include <linux/gfp.h>
 #include <linux/mm.h>
 #include <linux/swap.h>
 #include <linux/mman.h>
diff --git a/mm/filemap_xip.c b/mm/filemap_xip.c
index 78b94f0b6d5..83364df74a3 100644
--- a/mm/filemap_xip.c
+++ b/mm/filemap_xip.c
@@ -17,6 +17,7 @@
 #include <linux/sched.h>
 #include <linux/seqlock.h>
 #include <linux/mutex.h>
+#include <linux/gfp.h>
 #include <asm/tlbflush.h>
 #include <asm/io.h>
 
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 3a5aeb37c11..6034dc9e979 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -2,7 +2,6 @@
  * Generic hugetlb support.
  * (C) William Irwin, April 2004
  */
-#include <linux/gfp.h>
 #include <linux/list.h>
 #include <linux/init.h>
 #include <linux/module.h>
@@ -18,6 +17,7 @@
 #include <linux/mutex.h>
 #include <linux/bootmem.h>
 #include <linux/sysfs.h>
+#include <linux/slab.h>
 
 #include <asm/page.h>
 #include <asm/pgtable.h>
diff --git a/mm/kmemleak.c b/mm/kmemleak.c
index 5b069e4f5e4..2c0d032ac89 100644
--- a/mm/kmemleak.c
+++ b/mm/kmemleak.c
@@ -72,7 +72,6 @@
 #include <linux/module.h>
 #include <linux/kthread.h>
 #include <linux/prio_tree.h>
-#include <linux/gfp.h>
 #include <linux/fs.h>
 #include <linux/debugfs.h>
 #include <linux/seq_file.h>
diff --git a/mm/ksm.c b/mm/ksm.c
index a93f1b7f508..8cdfc2a1e8b 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -751,7 +751,7 @@ static int write_protect_page(struct vm_area_struct *vma, struct page *page,
 		 * page
 		 */
 		if (page_mapcount(page) + 1 + swapped != page_count(page)) {
-			set_pte_at_notify(mm, addr, ptep, entry);
+			set_pte_at(mm, addr, ptep, entry);
 			goto out_unlock;
 		}
 		entry = pte_wrprotect(entry);
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 7973b5221fb..f4ede99c8b9 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -1359,16 +1359,19 @@ void mem_cgroup_update_file_mapped(struct page *page, int val)
 
 	lock_page_cgroup(pc);
 	mem = pc->mem_cgroup;
-	if (!mem)
-		goto done;
-
-	if (!PageCgroupUsed(pc))
+	if (!mem || !PageCgroupUsed(pc))
 		goto done;
 
 	/*
 	 * Preemption is already disabled. We can use __this_cpu_xxx
 	 */
-	__this_cpu_add(mem->stat->count[MEM_CGROUP_STAT_FILE_MAPPED], val);
+	if (val > 0) {
+		__this_cpu_inc(mem->stat->count[MEM_CGROUP_STAT_FILE_MAPPED]);
+		SetPageCgroupFileMapped(pc);
+	} else {
+		__this_cpu_dec(mem->stat->count[MEM_CGROUP_STAT_FILE_MAPPED]);
+		ClearPageCgroupFileMapped(pc);
+	}
 
 done:
 	unlock_page_cgroup(pc);
@@ -1801,16 +1804,13 @@ static void __mem_cgroup_commit_charge(struct mem_cgroup *mem,
 static void __mem_cgroup_move_account(struct page_cgroup *pc,
 	struct mem_cgroup *from, struct mem_cgroup *to, bool uncharge)
 {
-	struct page *page;
-
 	VM_BUG_ON(from == to);
 	VM_BUG_ON(PageLRU(pc->page));
 	VM_BUG_ON(!PageCgroupLocked(pc));
 	VM_BUG_ON(!PageCgroupUsed(pc));
 	VM_BUG_ON(pc->mem_cgroup != from);
 
-	page = pc->page;
-	if (page_mapped(page) && !PageAnon(page)) {
+	if (PageCgroupFileMapped(pc)) {
 		/* Update mapped_file data for mem_cgroup */
 		preempt_disable();
 		__this_cpu_dec(from->stat->count[MEM_CGROUP_STAT_FILE_MAPPED]);
@@ -3691,8 +3691,10 @@ static struct mem_cgroup *mem_cgroup_alloc(void)
 	else
 		mem = vmalloc(size);
 
-	if (mem)
-		memset(mem, 0, size);
+	if (!mem)
+		return NULL;
+
+	memset(mem, 0, size);
 	mem->stat = alloc_percpu(struct mem_cgroup_stat_cpu);
 	if (!mem->stat) {
 		if (size < PAGE_SIZE)
@@ -3946,28 +3948,6 @@ one_by_one:
 	}
 	return ret;
 }
-#else	/* !CONFIG_MMU */
-static int mem_cgroup_can_attach(struct cgroup_subsys *ss,
-				struct cgroup *cgroup,
-				struct task_struct *p,
-				bool threadgroup)
-{
-	return 0;
-}
-static void mem_cgroup_cancel_attach(struct cgroup_subsys *ss,
-				struct cgroup *cgroup,
-				struct task_struct *p,
-				bool threadgroup)
-{
-}
-static void mem_cgroup_move_task(struct cgroup_subsys *ss,
-				struct cgroup *cont,
-				struct cgroup *old_cont,
-				struct task_struct *p,
-				bool threadgroup)
-{
-}
-#endif
 
 /**
  * is_target_pte_for_mc - check a pte whether it is valid for move charge
@@ -4330,6 +4310,28 @@ static void mem_cgroup_move_task(struct cgroup_subsys *ss,
 	}
 	mem_cgroup_clear_mc();
 }
+#else	/* !CONFIG_MMU */
+static int mem_cgroup_can_attach(struct cgroup_subsys *ss,
+				struct cgroup *cgroup,
+				struct task_struct *p,
+				bool threadgroup)
+{
+	return 0;
+}
+static void mem_cgroup_cancel_attach(struct cgroup_subsys *ss,
+				struct cgroup *cgroup,
+				struct task_struct *p,
+				bool threadgroup)
+{
+}
+static void mem_cgroup_move_task(struct cgroup_subsys *ss,
+				struct cgroup *cont,
+				struct cgroup *old_cont,
+				struct task_struct *p,
+				bool threadgroup)
+{
+}
+#endif
 
 struct cgroup_subsys mem_cgroup_subsys = {
 	.name = "memory",
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index d1f33516297..620b0b46159 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -44,6 +44,7 @@
 #include <linux/migrate.h>
 #include <linux/page-isolation.h>
 #include <linux/suspend.h>
+#include <linux/slab.h>
 #include "internal.h"
 
 int sysctl_memory_failure_early_kill __read_mostly = 0;
diff --git a/mm/memory.c b/mm/memory.c
index 5b7f2002e54..833952d8b74 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -56,6 +56,7 @@
 #include <linux/kallsyms.h>
 #include <linux/swapops.h>
 #include <linux/elf.h>
+#include <linux/gfp.h>
 
 #include <asm/io.h>
 #include <asm/pgalloc.h>
@@ -124,7 +125,7 @@ core_initcall(init_zero_pfn);
 
 #if defined(SPLIT_RSS_COUNTING)
 
-void __sync_task_rss_stat(struct task_struct *task, struct mm_struct *mm)
+static void __sync_task_rss_stat(struct task_struct *task, struct mm_struct *mm)
 {
 	int i;
 
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 643f66e1018..08f40a2f3fe 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -73,7 +73,6 @@
 #include <linux/sched.h>
 #include <linux/nodemask.h>
 #include <linux/cpuset.h>
-#include <linux/gfp.h>
 #include <linux/slab.h>
 #include <linux/string.h>
 #include <linux/module.h>
@@ -806,9 +805,13 @@ static long do_get_mempolicy(int *policy, nodemask_t *nmask,
 
 	err = 0;
 	if (nmask) {
-		task_lock(current);
-		get_policy_nodemask(pol, nmask);
-		task_unlock(current);
+		if (mpol_store_user_nodemask(pol)) {
+			*nmask = pol->w.user_nodemask;
+		} else {
+			task_lock(current);
+			get_policy_nodemask(pol, nmask);
+			task_unlock(current);
+		}
 	}
 
  out:
@@ -2195,8 +2198,8 @@ int mpol_parse_str(char *str, struct mempolicy **mpol, int no_context)
 			char *rest = nodelist;
 			while (isdigit(*rest))
 				rest++;
-			if (!*rest)
-				err = 0;
+			if (*rest)
+				goto out;
 		}
 		break;
 	case MPOL_INTERLEAVE:
@@ -2205,7 +2208,6 @@ int mpol_parse_str(char *str, struct mempolicy **mpol, int no_context)
 		 */
 		if (!nodelist)
 			nodes = node_states[N_HIGH_MEMORY];
-		err = 0;
 		break;
 	case MPOL_LOCAL:
 		/*
@@ -2215,11 +2217,19 @@ int mpol_parse_str(char *str, struct mempolicy **mpol, int no_context)
 			goto out;
 		mode = MPOL_PREFERRED;
 		break;
-
-	/*
-	 * case MPOL_BIND:    mpol_new() enforces non-empty nodemask.
-	 * case MPOL_DEFAULT: mpol_new() enforces empty nodemask, ignores flags.
-	 */
+	case MPOL_DEFAULT:
+		/*
+		 * Insist on a empty nodelist
+		 */
+		if (!nodelist)
+			err = 0;
+		goto out;
+	case MPOL_BIND:
+		/*
+		 * Insist on a nodelist
+		 */
+		if (!nodelist)
+			goto out;
 	}
 
 	mode_flags = 0;
@@ -2233,13 +2243,14 @@ int mpol_parse_str(char *str, struct mempolicy **mpol, int no_context)
 		else if (!strcmp(flags, "relative"))
 			mode_flags |= MPOL_F_RELATIVE_NODES;
 		else
-			err = 1;
+			goto out;
 	}
 
 	new = mpol_new(mode, mode_flags, &nodes);
 	if (IS_ERR(new))
-		err = 1;
-	else {
+		goto out;
+
+	{
 		int ret;
 		NODEMASK_SCRATCH(scratch);
 		if (scratch) {
@@ -2250,13 +2261,15 @@ int mpol_parse_str(char *str, struct mempolicy **mpol, int no_context)
 			ret = -ENOMEM;
 		NODEMASK_SCRATCH_FREE(scratch);
 		if (ret) {
-			err = 1;
 			mpol_put(new);
-		} else if (no_context) {
-			/* save for contextualization */
-			new->w.user_nodemask = nodes;
+			goto out;
 		}
 	}
+	err = 0;
+	if (no_context) {
+		/* save for contextualization */
+		new->w.user_nodemask = nodes;
+	}
 
 out:
 	/* Restore string for error message */
diff --git a/mm/migrate.c b/mm/migrate.c
index 88000b89fc9..d3f3f7f8107 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -32,6 +32,7 @@
 #include <linux/security.h>
 #include <linux/memcontrol.h>
 #include <linux/syscalls.h>
+#include <linux/gfp.h>
 
 #include "internal.h"
 
diff --git a/mm/mincore.c b/mm/mincore.c
index 7a3436ef39e..f77433c2027 100644
--- a/mm/mincore.c
+++ b/mm/mincore.c
@@ -7,8 +7,8 @@
 /*
  * The mincore() system call.
  */
-#include <linux/slab.h>
 #include <linux/pagemap.h>
+#include <linux/gfp.h>
 #include <linux/mm.h>
 #include <linux/mman.h>
 #include <linux/syscalls.h>
diff --git a/mm/mmu_context.c b/mm/mmu_context.c
index 0777654147c..9e82e937000 100644
--- a/mm/mmu_context.c
+++ b/mm/mmu_context.c
@@ -53,6 +53,7 @@ void unuse_mm(struct mm_struct *mm)
 	struct task_struct *tsk = current;
 
 	task_lock(tsk);
+	sync_mm_rss(tsk, mm);
 	tsk->mm = NULL;
 	/* active_mm is still 'mm' */
 	enter_lazy_tlb(mm, tsk);
diff --git a/mm/mmu_notifier.c b/mm/mmu_notifier.c
index 7e33f2cb3c7..438951d366f 100644
--- a/mm/mmu_notifier.c
+++ b/mm/mmu_notifier.c
@@ -16,6 +16,7 @@
 #include <linux/err.h>
 #include <linux/rcupdate.h>
 #include <linux/sched.h>
+#include <linux/slab.h>
 
 /*
  * This function can't run concurrently against mmu_notifier_register
diff --git a/mm/mprotect.c b/mm/mprotect.c
index 8bc969d8112..2d1bf7cf885 100644
--- a/mm/mprotect.c
+++ b/mm/mprotect.c
@@ -10,7 +10,6 @@
 
 #include <linux/mm.h>
 #include <linux/hugetlb.h>
-#include <linux/slab.h>
 #include <linux/shm.h>
 #include <linux/mman.h>
 #include <linux/fs.h>
diff --git a/mm/mremap.c b/mm/mremap.c
index e9c75efce60..cde56ee51ef 100644
--- a/mm/mremap.c
+++ b/mm/mremap.c
@@ -9,7 +9,6 @@
 
 #include <linux/mm.h>
 #include <linux/hugetlb.h>
-#include <linux/slab.h>
 #include <linux/shm.h>
 #include <linux/ksm.h>
 #include <linux/mman.h>
diff --git a/mm/nommu.c b/mm/nommu.c
index 605ace8982a..63fa17d121f 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -146,7 +146,7 @@ int __get_user_pages(struct task_struct *tsk, struct mm_struct *mm,
 			(VM_MAYREAD | VM_MAYWRITE) : (VM_READ | VM_WRITE);
 
 	for (i = 0; i < nr_pages; i++) {
-		vma = find_extend_vma(mm, start);
+		vma = find_vma(mm, start);
 		if (!vma)
 			goto finish_or_fault;
 
@@ -162,7 +162,7 @@ int __get_user_pages(struct task_struct *tsk, struct mm_struct *mm,
 		}
 		if (vmas)
 			vmas[i] = vma;
-		start += PAGE_SIZE;
+		start = (start + PAGE_SIZE) & PAGE_MASK;
 	}
 
 	return i;
@@ -764,7 +764,7 @@ EXPORT_SYMBOL(find_vma);
  */
 struct vm_area_struct *find_extend_vma(struct mm_struct *mm, unsigned long addr)
 {
-	return find_vma(mm, addr & PAGE_MASK);
+	return find_vma(mm, addr);
 }
 
 /*
@@ -1040,10 +1040,9 @@ static int do_mmap_shared_file(struct vm_area_struct *vma)
 	if (ret != -ENOSYS)
 		return ret;
 
-	/* getting an ENOSYS error indicates that direct mmap isn't
-	 * possible (as opposed to tried but failed) so we'll fall
-	 * through to making a private copy of the data and mapping
-	 * that if we can */
+	/* getting -ENOSYS indicates that direct mmap isn't possible (as
+	 * opposed to tried but failed) so we can only give a suitable error as
+	 * it's not possible to make a private copy if MAP_SHARED was given */
 	return -ENODEV;
 }
 
diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index 9b223af6a14..b68e802a7a7 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -18,6 +18,7 @@
 #include <linux/oom.h>
 #include <linux/mm.h>
 #include <linux/err.h>
+#include <linux/gfp.h>
 #include <linux/sched.h>
 #include <linux/swap.h>
 #include <linux/timex.h>
diff --git a/mm/page_io.c b/mm/page_io.c
index a19af956ee1..31a3b962230 100644
--- a/mm/page_io.c
+++ b/mm/page_io.c
@@ -12,6 +12,7 @@
 
 #include <linux/mm.h>
 #include <linux/kernel_stat.h>
+#include <linux/gfp.h>
 #include <linux/pagemap.h>
 #include <linux/swap.h>
 #include <linux/bio.h>
diff --git a/mm/pagewalk.c b/mm/pagewalk.c
index 7b47a57b664..8b1a2ce21ee 100644
--- a/mm/pagewalk.c
+++ b/mm/pagewalk.c
@@ -80,6 +80,37 @@ static int walk_pud_range(pgd_t *pgd, unsigned long addr, unsigned long end,
 	return err;
 }
 
+#ifdef CONFIG_HUGETLB_PAGE
+static unsigned long hugetlb_entry_end(struct hstate *h, unsigned long addr,
+				       unsigned long end)
+{
+	unsigned long boundary = (addr & huge_page_mask(h)) + huge_page_size(h);
+	return boundary < end ? boundary : end;
+}
+
+static int walk_hugetlb_range(struct vm_area_struct *vma,
+			      unsigned long addr, unsigned long end,
+			      struct mm_walk *walk)
+{
+	struct hstate *h = hstate_vma(vma);
+	unsigned long next;
+	unsigned long hmask = huge_page_mask(h);
+	pte_t *pte;
+	int err = 0;
+
+	do {
+		next = hugetlb_entry_end(h, addr, end);
+		pte = huge_pte_offset(walk->mm, addr & hmask);
+		if (pte && walk->hugetlb_entry)
+			err = walk->hugetlb_entry(pte, hmask, addr, next, walk);
+		if (err)
+			return err;
+	} while (addr = next, addr != end);
+
+	return 0;
+}
+#endif
+
 /**
  * walk_page_range - walk a memory map's page tables with a callback
  * @mm: memory map to walk
@@ -128,20 +159,16 @@ int walk_page_range(unsigned long addr, unsigned long end,
 		vma = find_vma(walk->mm, addr);
 #ifdef CONFIG_HUGETLB_PAGE
 		if (vma && is_vm_hugetlb_page(vma)) {
-			pte_t *pte;
-			struct hstate *hs;
-
 			if (vma->vm_end < next)
 				next = vma->vm_end;
-			hs = hstate_vma(vma);
-			pte = huge_pte_offset(walk->mm,
-					      addr & huge_page_mask(hs));
-			if (pte && !huge_pte_none(huge_ptep_get(pte))
-			    && walk->hugetlb_entry)
-				err = walk->hugetlb_entry(pte, addr,
-							  next, walk);
+			/*
+			 * Hugepage is very tightly coupled with vma, so
+			 * walk through hugetlb entries within a given vma.
+			 */
+			err = walk_hugetlb_range(vma, addr, next, walk);
 			if (err)
 				break;
+			pgd = pgd_offset(walk->mm, next);
 			continue;
 		}
 #endif
diff --git a/mm/percpu.c b/mm/percpu.c
index 768419d44ad..6e09741ddc6 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -1304,6 +1304,32 @@ void free_percpu(void __percpu *ptr)
 EXPORT_SYMBOL_GPL(free_percpu);
 
 /**
+ * is_kernel_percpu_address - test whether address is from static percpu area
+ * @addr: address to test
+ *
+ * Test whether @addr belongs to in-kernel static percpu area.  Module
+ * static percpu areas are not considered.  For those, use
+ * is_module_percpu_address().
+ *
+ * RETURNS:
+ * %true if @addr is from in-kernel static percpu area, %false otherwise.
+ */
+bool is_kernel_percpu_address(unsigned long addr)
+{
+	const size_t static_size = __per_cpu_end - __per_cpu_start;
+	void __percpu *base = __addr_to_pcpu_ptr(pcpu_base_addr);
+	unsigned int cpu;
+
+	for_each_possible_cpu(cpu) {
+		void *start = per_cpu_ptr(base, cpu);
+
+		if ((void *)addr >= start && (void *)addr < start + static_size)
+			return true;
+        }
+	return false;
+}
+
+/**
  * per_cpu_ptr_to_phys - convert translated percpu address to physical address
  * @addr: the address to be converted to physical address
  *
diff --git a/mm/percpu_up.c b/mm/percpu_up.c
new file mode 100644
index 00000000000..c4351c7f57d
--- /dev/null
+++ b/mm/percpu_up.c
@@ -0,0 +1,30 @@
+/*
+ * mm/percpu_up.c - dummy percpu memory allocator implementation for UP
+ */
+
+#include <linux/module.h>
+#include <linux/percpu.h>
+#include <linux/slab.h>
+
+void __percpu *__alloc_percpu(size_t size, size_t align)
+{
+	/*
+	 * Can't easily make larger alignment work with kmalloc.  WARN
+	 * on it.  Larger alignment should only be used for module
+	 * percpu sections on SMP for which this path isn't used.
+	 */
+	WARN_ON_ONCE(align > SMP_CACHE_BYTES);
+	return kzalloc(size, GFP_KERNEL);
+}
+EXPORT_SYMBOL_GPL(__alloc_percpu);
+
+void free_percpu(void __percpu *p)
+{
+	kfree(p);
+}
+EXPORT_SYMBOL_GPL(free_percpu);
+
+phys_addr_t per_cpu_ptr_to_phys(void *addr)
+{
+	return __pa(addr);
+}
diff --git a/mm/quicklist.c b/mm/quicklist.c
index 6633965bb27..2876349339a 100644
--- a/mm/quicklist.c
+++ b/mm/quicklist.c
@@ -14,6 +14,7 @@
  */
 #include <linux/kernel.h>
 
+#include <linux/gfp.h>
 #include <linux/mm.h>
 #include <linux/mmzone.h>
 #include <linux/module.h>
diff --git a/mm/readahead.c b/mm/readahead.c
index 337b20e946f..dfa9a1a03a1 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -9,6 +9,7 @@
 
 #include <linux/kernel.h>
 #include <linux/fs.h>
+#include <linux/gfp.h>
 #include <linux/mm.h>
 #include <linux/module.h>
 #include <linux/blkdev.h>
@@ -502,7 +503,7 @@ void page_cache_sync_readahead(struct address_space *mapping,
 		return;
 
 	/* be dumb */
-	if (filp->f_mode & FMODE_RANDOM) {
+	if (filp && (filp->f_mode & FMODE_RANDOM)) {
 		force_page_cache_readahead(mapping, filp, offset, req_size);
 		return;
 	}
diff --git a/mm/rmap.c b/mm/rmap.c
index fcd593c9c99..eaa7a09eb72 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -232,6 +232,7 @@ int anon_vma_fork(struct vm_area_struct *vma, struct vm_area_struct *pvma)
  out_error_free_anon_vma:
 	anon_vma_free(anon_vma);
  out_error:
+	unlink_anon_vmas(vma);
 	return -ENOMEM;
 }
 
diff --git a/mm/sparse-vmemmap.c b/mm/sparse-vmemmap.c
index 392b9bb5bc0..aa33fd67fa4 100644
--- a/mm/sparse-vmemmap.c
+++ b/mm/sparse-vmemmap.c
@@ -22,6 +22,7 @@
 #include <linux/bootmem.h>
 #include <linux/highmem.h>
 #include <linux/module.h>
+#include <linux/slab.h>
 #include <linux/spinlock.h>
 #include <linux/vmalloc.h>
 #include <linux/sched.h>
diff --git a/mm/sparse.c b/mm/sparse.c
index 22896d58913..dc0cc4d43ff 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -2,6 +2,7 @@
  * sparse memory mappings.
  */
 #include <linux/mm.h>
+#include <linux/slab.h>
 #include <linux/mmzone.h>
 #include <linux/bootmem.h>
 #include <linux/highmem.h>
diff --git a/mm/swap.c b/mm/swap.c
index 9036b89813a..7cd60bf0a97 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -30,6 +30,7 @@
 #include <linux/notifier.h>
 #include <linux/backing-dev.h>
 #include <linux/memcontrol.h>
+#include <linux/gfp.h>
 
 #include "internal.h"
 
diff --git a/mm/swap_state.c b/mm/swap_state.c
index 6d1daeb1cb4..e10f5833167 100644
--- a/mm/swap_state.c
+++ b/mm/swap_state.c
@@ -8,6 +8,7 @@
  */
 #include <linux/module.h>
 #include <linux/mm.h>
+#include <linux/gfp.h>
 #include <linux/kernel_stat.h>
 #include <linux/swap.h>
 #include <linux/swapops.h>
diff --git a/mm/truncate.c b/mm/truncate.c
index e87e3724482..f42675a3615 100644
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -9,6 +9,7 @@
 
 #include <linux/kernel.h>
 #include <linux/backing-dev.h>
+#include <linux/gfp.h>
 #include <linux/mm.h>
 #include <linux/swap.h>
 #include <linux/module.h>
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 79c809895fb..3ff3311447f 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -13,7 +13,7 @@
 
 #include <linux/mm.h>
 #include <linux/module.h>
-#include <linux/slab.h>
+#include <linux/gfp.h>
 #include <linux/kernel_stat.h>
 #include <linux/swap.h>
 #include <linux/pagemap.h>
@@ -1535,13 +1535,6 @@ static void get_scan_ratio(struct zone *zone, struct scan_control *sc,
 	unsigned long ap, fp;
 	struct zone_reclaim_stat *reclaim_stat = get_reclaim_stat(zone, sc);
 
-	/* If we have no swap space, do not bother scanning anon pages. */
-	if (!sc->may_swap || (nr_swap_pages <= 0)) {
-		percent[0] = 0;
-		percent[1] = 100;
-		return;
-	}
-
 	anon  = zone_nr_lru_pages(zone, sc, LRU_ACTIVE_ANON) +
 		zone_nr_lru_pages(zone, sc, LRU_INACTIVE_ANON);
 	file  = zone_nr_lru_pages(zone, sc, LRU_ACTIVE_FILE) +
@@ -1639,20 +1632,22 @@ static void shrink_zone(int priority, struct zone *zone,
 	unsigned long nr_reclaimed = sc->nr_reclaimed;
 	unsigned long nr_to_reclaim = sc->nr_to_reclaim;
 	struct zone_reclaim_stat *reclaim_stat = get_reclaim_stat(zone, sc);
+	int noswap = 0;
 
-	get_scan_ratio(zone, sc, percent);
+	/* If we have no swap space, do not bother scanning anon pages. */
+	if (!sc->may_swap || (nr_swap_pages <= 0)) {
+		noswap = 1;
+		percent[0] = 0;
+		percent[1] = 100;
+	} else
+		get_scan_ratio(zone, sc, percent);
 
 	for_each_evictable_lru(l) {
 		int file = is_file_lru(l);
 		unsigned long scan;
 
-		if (percent[file] == 0) {
-			nr[l] = 0;
-			continue;
-		}
-
 		scan = zone_nr_lru_pages(zone, sc, l);
-		if (priority) {
+		if (priority || noswap) {
 			scan >>= priority;
 			scan = (scan * percent[file]) / 100;
 		}
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 7f760cbc73f..fa12ea3051f 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -12,6 +12,7 @@
 #include <linux/mm.h>
 #include <linux/err.h>
 #include <linux/module.h>
+#include <linux/slab.h>
 #include <linux/cpu.h>
 #include <linux/vmstat.h>
 #include <linux/sched.h>