Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
rcu: Add missing __cpuinit annotation in rcutorture code
sched: Add "const" to is_idle_task() parameter
rcu: Make rcutorture bool parameters really bool (core code)
memblock: Fix alloc failure due to dumb underflow protection in memblock_find_in_range_node()

include/linux/sched.h

···
  * is_idle_task - is the specified task an idle task?
  * @p: the task in question.
  */
-static inline bool is_idle_task(struct task_struct *p)
+static inline bool is_idle_task(const struct task_struct *p)
 {
 	return p->pid == 0;
 }

kernel/rcutorture.c

···
 static int nfakewriters = 4;	/* # fake writer threads */
 static int stat_interval;	/* Interval between stats, in seconds. */
 				/*  Defaults to "only at end of test". */
-static int verbose;		/* Print more debug info. */
-static int test_no_idle_hz;	/* Test RCU's support for tickless idle CPUs. */
+static bool verbose;		/* Print more debug info. */
+static bool test_no_idle_hz;	/* Test RCU's support for tickless idle CPUs. */
 static int shuffle_interval = 3; /* Interval between shuffles (in sec)*/
 static int stutter = 5;		/* Start/stop testing interval (in sec) */
 static int irqreader = 1;	/* RCU readers from irq (timers). */
···
  * Execute random CPU-hotplug operations at the interval specified
  * by the onoff_interval.
  */
-static int
+static int __cpuinit
 rcu_torture_onoff(void *arg)
 {
 	int cpu;
···
 	return 0;
 }
 
-static int
+static int __cpuinit
 rcu_torture_onoff_init(void)
 {
 	if (onoff_interval <= 0)

mm/memblock.c

···
 	if (end == MEMBLOCK_ALLOC_ACCESSIBLE)
 		end = memblock.current_limit;
 
-	/* adjust @start to avoid underflow and allocating the first page */
-	start = max3(start, size, (phys_addr_t)PAGE_SIZE);
+	/* avoid allocating the first page */
+	start = max_t(phys_addr_t, start, PAGE_SIZE);
 	end = max(start, end);
 
 	for_each_free_mem_range_reverse(i, nid, &this_start, &this_end, NULL) {
 		this_start = clamp(this_start, start, end);
 		this_end = clamp(this_end, start, end);
+
+		if (this_end < size)
+			continue;
 
 		cand = round_down(this_end - size, align);
 		if (cand >= this_start)