Merge branch 'akpm' (patches from Andrew)

Merge updates from Andrew Morton:

 - various misc bits

 - most of MM (quite a lot of MM material is awaiting the merge of
   linux-next dependencies)

 - kasan

 - printk updates

 - procfs updates

 - MAINTAINERS

 - /lib updates

 - checkpatch updates

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (123 commits)
  init: reduce rootwait polling interval time to 5ms
  binfmt_elf: use vmalloc() for allocation of vma_filesz
  checkpatch: don't emit unified-diff error for rename-only patches
  checkpatch: don't check c99 types like uint8_t under tools
  checkpatch: avoid multiple line dereferences
  checkpatch: don't check .pl files, improve absolute path commit log test
  scripts/checkpatch.pl: fix spelling
  checkpatch: don't try to get maintained status when --no-tree is given
  lib/ida: document locking requirements a bit better
  lib/rbtree.c: fix typo in comment of ____rb_erase_color
  lib/Kconfig.debug: make CONFIG_STRICT_DEVMEM depend on CONFIG_DEVMEM
  MAINTAINERS: add drm and drm/i915 irc channels
  MAINTAINERS: add "C:" for URI for chat where developers hang out
  MAINTAINERS: add drm and drm/i915 bug filing info
  MAINTAINERS: add "B:" for URI where to file bugs
  get_maintainer: look for arbitrary letter prefixes in sections
  printk: add Kconfig option to set default console loglevel
  printk/sound: handle more message headers
  printk/btrfs: handle more message headers
  printk/kdb: handle more message headers
  ...

113 files changed, 1550 insertions, 1041 deletions

diff --git a/Documentation/devicetree/booting-without-of.txt b/Documentation/devicetree/booting-without-of.txt
index 3f1437fbca6b..280d283304bb 100644
--- a/Documentation/devicetree/booting-without-of.txt
+++ b/Documentation/devicetree/booting-without-of.txt
@@ -974,6 +974,13 @@ compatibility.
       4Gb. Some vendors prefer splitting those ranges into smaller
       segments, but the kernel doesn't care.
 
+  Additional properties:
+
+    - hotpluggable : The presence of this property provides an explicit
+      hint to the operating system that this memory may potentially be
+      removed later. The kernel can take this into consideration when
+      doing nonmovable allocations and when laying out memory zones.
+
   e) The /chosen node
 
   This node is a bit "special". Normally, that's where Open Firmware
diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt
index 74329fd0add2..c03f2f91c6ab 100644
--- a/Documentation/filesystems/proc.txt
+++ b/Documentation/filesystems/proc.txt
@@ -191,6 +191,7 @@ read the file /proc/PID/status:
   CapPrm: 0000000000000000
   CapEff: 0000000000000000
   CapBnd: ffffffffffffffff
+  NoNewPrivs:     0
   Seccomp:        0
   voluntary_ctxt_switches:        0
   nonvoluntary_ctxt_switches:     1
@@ -262,6 +263,7 @@ Table 1-2: Contents of the status files (as of 4.1)
  CapPrm                      bitmap of permitted capabilities
  CapEff                      bitmap of effective capabilities
  CapBnd                      bitmap of capabilities bounding set
+ NoNewPrivs                  no_new_privs, like prctl(PR_GET_NO_NEW_PRIV, ...)
  Seccomp                     seccomp mode, like prctl(PR_GET_SECCOMP, ...)
  Cpus_allowed                mask of CPUs on which this process may run
  Cpus_allowed_list           Same as previous, but in "list format"
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index c5f1546a440f..6c6141c76eaa 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -2397,7 +2397,7 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 			that the amount of memory usable for all allocations
 			is not too small.
 
-	movable_node	[KNL,X86] Boot-time switch to enable the effects
+	movable_node	[KNL] Boot-time switch to enable the effects
 			of CONFIG_MOVABLE_NODE=y. See mm/Kconfig for details.
 
 	MTD_Partition=	[MTD]
diff --git a/Documentation/vm/transhuge.txt b/Documentation/vm/transhuge.txt
index 2ec6adb5a4ce..c4171e4519c2 100644
--- a/Documentation/vm/transhuge.txt
+++ b/Documentation/vm/transhuge.txt
@@ -136,6 +136,11 @@ or enable it back by writing 1:
 echo 0 >/sys/kernel/mm/transparent_hugepage/use_zero_page
 echo 1 >/sys/kernel/mm/transparent_hugepage/use_zero_page
 
+Some userspace (such as a test program, or an optimized memory allocation
+library) may want to know the size (in bytes) of a transparent hugepage:
+
+cat /sys/kernel/mm/transparent_hugepage/hpage_pmd_size
+
 khugepaged will be automatically started when
 transparent_hugepage/enabled is set to "always" or "madvise, and it'll
 be automatically shutdown if it's set to "never".
diff --git a/MAINTAINERS b/MAINTAINERS
index 4e62a0e67df9..88315cfcfb39 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -74,6 +74,10 @@ Descriptions of section entries:
 	   These reviewers should be CCed on patches.
 	L: Mailing list that is relevant to this area
 	W: Web-page with status/info
+	B: URI for where to file bugs. A web-page with detailed bug
+	   filing info, a direct bug tracker link, or a mailto: URI.
+	C: URI for chat protocol, server and channel where developers
+	   usually hang out, for example irc://server/channel.
 	Q: Patchwork web based patch tracking system site
 	T: SCM tree type and location.
 	   Type is one of: git, hg, quilt, stgit, topgit
@@ -4024,6 +4028,8 @@ DRM DRIVERS
 M:	David Airlie <airlied@linux.ie>
 L:	dri-devel@lists.freedesktop.org
 T:	git git://people.freedesktop.org/~airlied/linux
+B:	https://bugs.freedesktop.org/
+C:	irc://chat.freenode.net/dri-devel
 S:	Maintained
 F:	drivers/gpu/drm/
 F:	drivers/gpu/vga/
@@ -4076,6 +4082,8 @@ M:	Jani Nikula <jani.nikula@linux.intel.com>
 L:	intel-gfx@lists.freedesktop.org
 L:	dri-devel@lists.freedesktop.org
 W:	https://01.org/linuxgraphics/
+B:	https://01.org/linuxgraphics/documentation/how-report-bugs
+C:	irc://chat.freenode.net/intel-gfx
 Q:	http://patchwork.freedesktop.org/project/intel-gfx/
 T:	git git://anongit.freedesktop.org/drm-intel
 S:	Supported
diff --git a/arch/arm/include/asm/tlb.h b/arch/arm/include/asm/tlb.h
index 1e25cd80589e..3f2eb76243e3 100644
--- a/arch/arm/include/asm/tlb.h
+++ b/arch/arm/include/asm/tlb.h
@@ -186,6 +186,8 @@ tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep, unsigned long addr)
 	tlb_add_flush(tlb, addr);
 }
 
+#define tlb_remove_huge_tlb_entry(h, tlb, ptep, address)	\
+	tlb_remove_tlb_entry(tlb, ptep, address)
 /*
  * In the case of tlb vma handling, we can optimise these away in the
  * case where we're doing a full MM flush.  When we're doing a munmap,
@@ -211,18 +213,17 @@ tlb_end_vma(struct mmu_gather *tlb, struct vm_area_struct *vma)
 
 static inline bool __tlb_remove_page(struct mmu_gather *tlb, struct page *page)
 {
+	tlb->pages[tlb->nr++] = page;
+	VM_WARN_ON(tlb->nr > tlb->max);
 	if (tlb->nr == tlb->max)
 		return true;
-	tlb->pages[tlb->nr++] = page;
 	return false;
 }
 
 static inline void tlb_remove_page(struct mmu_gather *tlb, struct page *page)
 {
-	if (__tlb_remove_page(tlb, page)) {
+	if (__tlb_remove_page(tlb, page))
 		tlb_flush_mmu(tlb);
-		__tlb_remove_page(tlb, page);
-	}
 }
 
 static inline bool __tlb_remove_page_size(struct mmu_gather *tlb,
@@ -231,12 +232,6 @@ static inline bool __tlb_remove_page_size(struct mmu_gather *tlb,
 	return __tlb_remove_page(tlb, page);
 }
 
-static inline bool __tlb_remove_pte_page(struct mmu_gather *tlb,
-					 struct page *page)
-{
-	return __tlb_remove_page(tlb, page);
-}
-
 static inline void tlb_remove_page_size(struct mmu_gather *tlb,
 					struct page *page, int page_size)
 {
@@ -284,5 +279,11 @@ tlb_remove_pmd_tlb_entry(struct mmu_gather *tlb, pmd_t *pmdp, unsigned long addr
 
 #define tlb_migrate_finish(mm)		do { } while (0)
 
+#define tlb_remove_check_page_size_change tlb_remove_check_page_size_change
+static inline void tlb_remove_check_page_size_change(struct mmu_gather *tlb,
+						     unsigned int page_size)
+{
+}
+