Merge branch 'akpm' (patches from Andrew)

Merge updates from Andrew Morton:

 - fsnotify fix

 - poll() timeout fix

 - a few scripts/ tweaks

 - debugobjects updates

 - the (small) ocfs2 queue

 - Minor fixes to kernel/padata.c

 - Maybe half of the MM queue

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (117 commits)
  mm, page_alloc: restore the original nodemask if the fast path allocation failed
  mm, page_alloc: uninline the bad page part of check_new_page()
  mm, page_alloc: don't duplicate code in free_pcp_prepare
  mm, page_alloc: defer debugging checks of pages allocated from the PCP
  mm, page_alloc: defer debugging checks of freed pages until a PCP drain
  cpuset: use static key better and convert to new API
  mm, page_alloc: inline pageblock lookup in page free fast paths
  mm, page_alloc: remove unnecessary variable from free_pcppages_bulk
  mm, page_alloc: pull out side effects from free_pages_check
  mm, page_alloc: un-inline the bad part of free_pages_check
  mm, page_alloc: check multiple page fields with a single branch
  mm, page_alloc: remove field from alloc_context
  mm, page_alloc: avoid looking up the first zone in a zonelist twice
  mm, page_alloc: shortcut watermark checks for order-0 pages
  mm, page_alloc: reduce cost of fair zone allocation policy retry
  mm, page_alloc: shorten the page allocator fast path
  mm, page_alloc: check once if a zone has isolated pageblocks
  mm, page_alloc: move __GFP_HARDWALL modifications out of the fastpath
  mm, page_alloc: simplify last cpupid reset
  mm, page_alloc: remove unnecessary initialisation from __alloc_pages_nodemask()
  ...

4 files changed, 87 insertions, 43 deletions

diff --git a/lib/Makefile b/lib/Makefile
index 931396a..42b6918 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -25,7 +25,7 @@ lib-y := ctype.o string.o vsprintf.o cmdline.o \
 	 sha1.o md5.o irq_regs.o argv_split.o \
 	 flex_proportions.o ratelimit.o show_mem.o \
 	 is_single_threaded.o plist.o decompress.o kobject_uevent.o \
-	 earlycpio.o seq_buf.o nmi_backtrace.o
+	 earlycpio.o seq_buf.o nmi_backtrace.o nodemask.o
 
 obj-$(CONFIG_ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS) += usercopy.o
 lib-$(CONFIG_MMU) += ioremap.o
diff --git a/lib/debugobjects.c b/lib/debugobjects.c
index 519b5a1..a8e1260 100644
--- a/lib/debugobjects.c
+++ b/lib/debugobjects.c
@@ -269,16 +269,15 @@ static void debug_print_object(struct debug_obj *obj, char *msg)
  * Try to repair the damage, so we have a better chance to get useful
  * debug output.
  */
-static int
-debug_object_fixup(int (*fixup)(void *addr, enum debug_obj_state state),
+static bool
+debug_object_fixup(bool (*fixup)(void *addr, enum debug_obj_state state),
 		   void * addr, enum debug_obj_state state)
 {
-	int fixed = 0;
-
-	if (fixup)
-		fixed = fixup(addr, state);
-	debug_objects_fixups += fixed;
-	return fixed;
+	if (fixup && fixup(addr, state)) {
+		debug_objects_fixups++;
+		return true;
+	}
+	return false;
 }
 
 static void debug_object_is_on_stack(void *addr, int onstack)
@@ -416,7 +415,7 @@ int debug_object_activate(void *addr, struct debug_obj_descr *descr)
 			state = obj->state;
 			raw_spin_unlock_irqrestore(&db->lock, flags);
 			ret = debug_object_fixup(descr->fixup_activate, addr, state);
-			return ret ? -EINVAL : 0;
+			return ret ? 0 : -EINVAL;
 
 		case ODEBUG_STATE_DESTROYED:
 			debug_print_object(obj, "activate");
@@ -432,14 +431,21 @@ int debug_object_activate(void *addr, struct debug_obj_descr *descr)
 
 	raw_spin_unlock_irqrestore(&db->lock, flags);
 	/*
-	 * This happens when a static object is activated. We
-	 * let the type specific code decide whether this is
-	 * true or not.
+	 * We are here when a static object is activated. We
+	 * let the type specific code confirm whether this is
+	 * true or not. if true, we just make sure that the
+	 * static object is tracked in the object tracker. If
+	 * not, this must be a bug, so we try to fix it up.
 	 */
-	if (debug_object_fixup(descr->fixup_activate, addr,
-			   ODEBUG_STATE_NOTAVAILABLE)) {
+	if (descr->is_static_object && descr->is_static_object(addr)) {
+		/* track this static object */
+		debug_object_init(addr, descr);
+		debug_object_activate(addr, descr);
+	} else {
 		debug_print_object(&o, "activate");
-		return -EINVAL;
+		ret = debug_object_fixup(descr->fixup_activate, addr,
+					ODEBUG_STATE_NOTAVAILABLE);
+		return ret ? 0 : -EINVAL;
 	}
 	return 0;
 }
@@ -603,12 +609,18 @@ void debug_object_assert_init(void *addr, struct debug_obj_descr *descr)
 
 		raw_spin_unlock_irqrestore(&db->lock, flags);
 		/*
-		 * Maybe the object is static.  Let the type specific
-		 * code decide what to do.
+		 * Maybe the object is static, and we let the type specific
+		 * code confirm. Track this static object if true, else invoke
+		 * fixup.
 		 */
-		if (debug_object_fixup(descr->fixup_assert_init, addr,
-				       ODEBUG_STATE_NOTAVAILABLE))
+		if (descr->is_static_object && descr->is_static_object(addr)) {
+			/* Track this static object */
+			debug_object_init(addr, descr);
+		} else {
 			debug_print_object(&o, "assert_init");
+			debug_object_fixup(descr->fixup_assert_init, addr,
+					   ODEBUG_STATE_NOTAVAILABLE);
+		}
 		return;
 	}
 
@@ -793,11 +805,18 @@ struct self_test {
 
 static __initdata struct debug_obj_descr descr_type_test;
 
+static bool __init is_static_object(void *addr)
+{
+	struct self_test *obj = addr;
+
+	return obj->static_init;
+}
+
 /*
  * fixup_init is called when:
  * - an active object is initialized
  */
-static int __init fixup_init(void *addr, enum debug_obj_state state)
+static bool __init fixup_init(void *addr, enum debug_obj_state state)
 {
 	struct self_test *obj = addr;
 
@@ -805,37 +824,31 @@ static int __init fixup_init(void *addr, enum debug_obj_state state)
 	case ODEBUG_STATE_ACTIVE:
 		debug_object_deactivate(obj, &descr_type_test);
 		debug_object_init(obj, &descr_type_test);
-		return 1;
+		return true;
 	default:
-		return 0;
+		return false;
 	}
 }
 
 /*
  * fixup_activate is called when:
  * - an active object is activated
- * - an unknown object is activated (might be a statically initialized object)
+ * - an unknown non-static object is activated
  */
-static int __init fixup_activate(void *addr, enum debug_obj_state state)
+static bool __init fixup_activate(void *addr, enum debug_obj_state state)
 {
 	struct self_test *obj = addr;
 
 	switch (state) {
 	case ODEBUG_STATE_NOTAVAILABLE:
-		if (obj->static_init == 1) {
-			debug_object_init(obj, &descr_type_test);
-			debug_object_activate(obj, &descr_type_test);
-			return 0;
-		}
-		return 1;
-
+		return true;
 	case ODEBUG_STATE_ACTIVE:
 		debug_object_deactivate(obj, &descr_type_test);
 		debug_object_activate(obj, &descr_type_test);
-		return 1;
+		return true;
 
 	default:
-		return 0;
+		return false;
 	}
 }
 
@@ -843,7 +856,7 @@ static int __init fixup_activate(void *addr, enum debug_obj_state state)
  * fixup_destroy is called when:
  * - an active object is destroyed
  */
-static int __init fixup_destroy(void *addr, enum debug_obj_state state)
+static bool __init fixup_destroy(void *addr, enum debug_obj_state state)
 {
 	struct self_test *obj = addr;
 
@@ -851,9 +864,9 @@ static int __init fixup_destroy(void *addr, enum debug_obj_state state)
 	case ODEBUG_STATE_ACTIVE:
 		debug_object_deactivate(obj, &descr_type_test);
 		debug_object_destroy(obj, &descr_type_test);
-		return 1;
+		return true;
 	default:
-		return 0;
+		return false;
 	}
 }
 
@@ -861,7 +874,7 @@ static int __init fixup_destroy(void *addr, enum debug_obj_state state)
  * fixup_free is called when:
  * - an active object is freed
  */
-static int __init fixup_free(void *addr, enum debug_obj_state state)
+static bool __init fixup_free(void *addr, enum debug_obj_state state)
 {
 	struct self_test *obj = addr;
 
@@ -869,9 +882,9 @@ static int __init fixup_free(void *addr, enum debug_obj_state state)
 	case ODEBUG_STATE_ACTIVE:
 		debug_object_deactivate(obj, &descr_type_test);
 		debug_object_free(obj, &descr_type_test);
-		return 1;
+		return true;
 	default:
-		return 0;
+		return false;
 	}
 }
 
@@ -917,6 +930,7 @@ out:
 
 static __initdata struct debug_obj_descr descr_type_test = {
 	.name			= "selftest",
+	.is_static_object	= is_static_object,
 	.fixup_init		= fixup_init,
 	.fixup_activate		= fixup_activate,
 	.fixup_destroy		= fixup_destroy,
diff --git a/lib/nodemask.c b/lib/nodemask.c
new file mode 100644
index 0000000..e42a5bf4
--- /dev/null
+++ b/lib/nodemask.c
@@ -0,0 +1,30 @@
+#include <linux/nodemask.h>
+#include <linux/module.h>
+#include <linux/random.h>
+
+int __next_node_in(int node, const nodemask_t *srcp)
+{
+	int ret = __next_node(node, srcp);
+
+	if (ret == MAX_NUMNODES)
+		ret = __first_node(srcp);
+	return ret;
+}
+EXPORT_SYMBOL(__next_node_in);
+
+#ifdef CONFIG_NUMA
+/*
+ * Return the bit number of a random bit set in the nodemask.
+ * (returns NUMA_NO_NODE if nodemask is empty)
+ */
+int node_random(const nodemask_t *maskp)
+{
+	int w, bit = NUMA_NO_NODE;
+
+	w = nodes_weight(*maskp);
+	if (w)
+		bit = bitmap_ord_to_pos(maskp->bits,
+			get_random_int() % w, MAX_NUMNODES);
+	return bit;
+}
+#endif
diff --git a/lib/percpu_counter.c b/lib/percpu_counter.c
index f051d69..72d3611 100644
--- a/lib/percpu_counter.c
+++ b/lib/percpu_counter.c
@@ -19,7 +19,7 @@ static DEFINE_SPINLOCK(percpu_counters_lock);
 
 static struct debug_obj_descr percpu_counter_debug_descr;
 
-static int percpu_counter_fixup_free(void *addr, enum debug_obj_state state)
+static bool percpu_counter_fixup_free(void *addr, enum debug_obj_state state)
 {
 	struct percpu_counter *fbc = addr;
 
@@ -27,9 +27,9 @@ static int percpu_counter_fixup_free(void *addr, enum debug_obj_state state)
 	case ODEBUG_STATE_ACTIVE:
 		percpu_counter_destroy(fbc);
 		debug_object_free(fbc, &percpu_counter_debug_descr);
-		return 1;
+		return true;
 	default:
-		return 0;
+		return false;
 	}
 }