Merge branch 'akpm' (Andrew's patch-bomb)

Merge fixes from Andrew Morton:
 "13 patches.  12 are fixes and one is a little preparatory thing for
  Andi."

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (13 commits)
  memory hotplug: fix section info double registration bug
  mm/page_alloc: fix the page address of higher page's buddy calculation
  drivers/rtc/rtc-twl.c: ensure all interrupts are disabled during probe
  compiler.h: add __visible
  pid-namespace: limit value of ns_last_pid to (0, max_pid)
  include/net/sock.h: squelch compiler warning in sk_rmem_schedule()
  slub: consider pfmemalloc_match() in get_partial_node()
  slab: fix starting index for finding another object
  slab: do ClearSlabPfmemalloc() for all pages of slab
  nbd: clear waiting_queue on shutdown
  MAINTAINERS: fix TXT maintainer list and source repo path
  mm/ia64: fix a memory block size bug
  memory hotplug: reset pgdat->kswapd to NULL if creating kernel thread fails

3 files changed, 12 insertions, 1 deletions

diff --git a/include/linux/compiler-gcc4.h b/include/linux/compiler-gcc4.h
index 2f4079175afb..934bc34d5f99 100644
--- a/include/linux/compiler-gcc4.h
+++ b/include/linux/compiler-gcc4.h
@@ -49,6 +49,13 @@
 #endif
 #endif
 
+#if __GNUC_MINOR__ >= 6
+/*
+ * Tell the optimizer that something else uses this function or variable.
+ */
+#define __visible __attribute__((externally_visible))
+#endif
+
 #if __GNUC_MINOR__ > 0
 #define __compiletime_object_size(obj) __builtin_object_size(obj, 0)
 #endif
diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index 923d093c9cea..f430e4162f41 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -278,6 +278,10 @@ void ftrace_likely_update(struct ftrace_branch_data *f, int val, int expect);
 # define __section(S) __attribute__ ((__section__(#S)))
 #endif
 
+#ifndef __visible
+#define __visible
+#endif
+
 /* Are two types/vars the same type (ignoring qualifiers)? */
 #ifndef __same_type
 # define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b))
diff --git a/include/linux/memory.h b/include/linux/memory.h
index 1ac7f6e405f9..ff9a9f8e0ed9 100644
--- a/include/linux/memory.h
+++ b/include/linux/memory.h
@@ -19,7 +19,7 @@
 #include <linux/compiler.h>
 #include <linux/mutex.h>
 
-#define MIN_MEMORY_BLOCK_SIZE     (1 << SECTION_SIZE_BITS)
+#define MIN_MEMORY_BLOCK_SIZE     (1UL << SECTION_SIZE_BITS)
 
 struct memory_block {
         unsigned long start_section_nr;