diff --git a/[refs] b/[refs]
index 40366d3321c1..554a0c4bef35 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 2c661a669b3e2e34311d7965271a628671191e45
+refs/heads/master: 13f0feafa6b8aead57a2a328e2fca6a5828bf286
diff --git a/trunk/Documentation/ioctl/ioctl-number.txt b/trunk/Documentation/ioctl/ioctl-number.txt
index dbea4f95fc85..7bb0d934b6d8 100644
--- a/trunk/Documentation/ioctl/ioctl-number.txt
+++ b/trunk/Documentation/ioctl/ioctl-number.txt
@@ -139,7 +139,6 @@ Code	Seq#	Include File		Comments
 'm'	all	linux/synclink.h	conflict!
 'm'	00-1F	net/irda/irmod.h	conflict!
 'n'	00-7F	linux/ncp_fs.h
-'n'	80-8F	linux/nilfs2_fs.h	NILFS2
 'n'	E0-FF	video/matrox.h          matroxfb
 'o'	00-1F	fs/ocfs2/ocfs2_fs.h	OCFS2
 'o'     00-03   include/mtd/ubi-user.h  conflict! (OCFS2 and UBI overlaps)
diff --git a/trunk/arch/mn10300/include/asm/pci.h b/trunk/arch/mn10300/include/asm/pci.h
index 19aecc90f7a4..35d2ed6396f6 100644
--- a/trunk/arch/mn10300/include/asm/pci.h
+++ b/trunk/arch/mn10300/include/asm/pci.h
@@ -59,6 +59,7 @@ void pcibios_penalize_isa_irq(int irq);
 #include <linux/slab.h>
 #include <asm/scatterlist.h>
 #include <linux/string.h>
+#include <linux/mm.h>
 #include <asm/io.h>
 
 struct pci_dev;
diff --git a/trunk/arch/powerpc/kernel/dma.c b/trunk/arch/powerpc/kernel/dma.c
index ccf129d47d84..20a60d661ba8 100644
--- a/trunk/arch/powerpc/kernel/dma.c
+++ b/trunk/arch/powerpc/kernel/dma.c
@@ -7,7 +7,6 @@
 
 #include <linux/device.h>
 #include <linux/dma-mapping.h>
-#include <linux/lmb.h>
 #include <asm/bug.h>
 #include <asm/abs_addr.h>
 
@@ -91,10 +90,11 @@ static void dma_direct_unmap_sg(struct device *dev, struct scatterlist *sg,
 static int dma_direct_dma_supported(struct device *dev, u64 mask)
 {
 #ifdef CONFIG_PPC64
-	/* Could be improved so platforms can set the limit in case
+	/* Could be improved to check for memory though it better be
+	 * done via some global so platforms can set the limit in case
 	 * they have limited DMA windows
 	 */
-	return mask >= (lmb_end_of_DRAM() - 1);
+	return mask >= DMA_BIT_MASK(32);
 #else
 	return 1;
 #endif
diff --git a/trunk/fs/proc/base.c b/trunk/fs/proc/base.c
index 3ce5ae9e3d2d..917f338a6739 100644
--- a/trunk/fs/proc/base.c
+++ b/trunk/fs/proc/base.c
@@ -237,20 +237,19 @@ struct mm_struct *mm_for_maps(struct task_struct *task)
 	struct mm_struct *mm = get_task_mm(task);
 	if (!mm)
 		return NULL;
+	if (mm != current->mm) {
+		/*
+		 * task->mm can be changed before security check,
+		 * in that case we must notice the change after.
+		 */
+		if (!ptrace_may_access(task, PTRACE_MODE_READ) ||
+		    mm != task->mm) {
+			mmput(mm);
+			return NULL;
+		}
+	}
 	down_read(&mm->mmap_sem);
-	task_lock(task);
-	if (task->mm != mm)
-		goto out;
-	if (task->mm != current->mm &&
-	    __ptrace_may_access(task, PTRACE_MODE_READ) < 0)
-		goto out;
-	task_unlock(task);
 	return mm;
-out:
-	task_unlock(task);
-	up_read(&mm->mmap_sem);
-	mmput(mm);
-	return NULL;
 }
 
 static int proc_pid_cmdline(struct task_struct *task, char * buffer)
diff --git a/trunk/mm/mempool.c b/trunk/mm/mempool.c
index 32e75d400503..a46eb1b4bb66 100644
--- a/trunk/mm/mempool.c
+++ b/trunk/mm/mempool.c
@@ -303,14 +303,14 @@ EXPORT_SYMBOL(mempool_free_slab);
  */
 void *mempool_kmalloc(gfp_t gfp_mask, void *pool_data)
 {
-	size_t size = (size_t)pool_data;
+	size_t size = (size_t)(long)pool_data;
 	return kmalloc(size, gfp_mask);
 }
 EXPORT_SYMBOL(mempool_kmalloc);
 
 void *mempool_kzalloc(gfp_t gfp_mask, void *pool_data)
 {
-	size_t size = (size_t)pool_data;
+	size_t size = (size_t) pool_data;
 	return kzalloc(size, gfp_mask);
 }
 EXPORT_SYMBOL(mempool_kzalloc);