26 files changed, 227 insertions, 78 deletions

diff --git a/MAINTAINERS b/MAINTAINERS
index 3ab0949599cd..51ff2aea8a32 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -648,7 +648,7 @@ F:	arch/arm/
 
 ARM SUB-ARCHITECTURES
 L:      linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
-S:      MAINTAINED
+S:      Maintained
 F:      arch/arm/mach-*/
 F:      arch/arm/plat-*/
 T:      git git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc.git
@@ -5507,8 +5507,7 @@ M:	Benoît Cousson <b-cousson@ti.com>
 M:      Paul Walmsley <paul@pwsan.com>
 L:      linux-omap@vger.kernel.org
 S:      Maintained
-F:      arch/arm/mach-omap2/omap_hwmod.c
-F:      arch/arm/plat-omap/include/plat/omap_hwmod.h
+F:      arch/arm/mach-omap2/omap_hwmod.*
 
 OMAP HWMOD DATA FOR OMAP4-BASED DEVICES
 M:      Benoît Cousson <b-cousson@ti.com>
@@ -7334,7 +7333,7 @@ S:	Odd Fixes
 F:      drivers/staging/speakup/
 
 STAGING - TI DSP BRIDGE DRIVERS
-M:      Omar Ramirez Luna <omar.ramirez@ti.com>
+M:      Omar Ramirez Luna <omar.ramirez@copitl.com>
 S:      Odd Fixes
 F:      drivers/staging/tidspbridge/
 
diff --git a/arch/mn10300/Kconfig b/arch/mn10300/Kconfig
index aa03f2e13385..e70001cfa05b 100644
--- a/arch/mn10300/Kconfig
+++ b/arch/mn10300/Kconfig
@@ -6,6 +6,7 @@ config MN10300
         select ARCH_WANT_IPC_PARSE_VERSION
         select HAVE_ARCH_TRACEHOOK
         select HAVE_ARCH_KGDB
+        select GENERIC_ATOMIC64
         select HAVE_NMI_WATCHDOG if MN10300_WD_TIMER
         select GENERIC_CLOCKEVENTS
         select MODULES_USE_ELF_RELA
diff --git a/drivers/rtc/rtc-da9055.c b/drivers/rtc/rtc-da9055.c
index 96bafc5c3bf8..8f0dcfedb83c 100644
--- a/drivers/rtc/rtc-da9055.c
+++ b/drivers/rtc/rtc-da9055.c
@@ -227,7 +227,7 @@ static const struct rtc_class_ops da9055_rtc_ops = {
         .alarm_irq_enable = da9055_rtc_alarm_irq_enable,
 };
 
-static int __init da9055_rtc_device_init(struct da9055 *da9055,
+static int da9055_rtc_device_init(struct da9055 *da9055,
                                         struct da9055_pdata *pdata)
 {
         int ret;
diff --git a/drivers/video/ssd1307fb.c b/drivers/video/ssd1307fb.c
index 4d99dd7a6831..395cb6a8d8f3 100644
--- a/drivers/video/ssd1307fb.c
+++ b/drivers/video/ssd1307fb.c
@@ -145,8 +145,8 @@ static void ssd1307fb_update_display(struct ssd1307fb_par *par)
                                 u32 page_length = SSD1307FB_WIDTH * i;
                                 u32 index = page_length + (SSD1307FB_WIDTH * k + j) / 8;
                                 u8 byte = *(vmem + index);
-                                u8 bit = byte & (1 << (7 - (j % 8)));
-                                bit = bit >> (7 - (j % 8));
+                                u8 bit = byte & (1 << (j % 8));
+                                bit = bit >> (j % 8);
                                 buf |= bit << k;
                         }
                         ssd1307fb_write_data(par->client, buf);
diff --git a/fs/exec.c b/fs/exec.c
index 18c45cac368f..20df02c1cc70 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -434,8 +434,9 @@ static int count(struct user_arg_ptr argv, int max)
                         if (IS_ERR(p))
                                 return -EFAULT;
 
-                        if (i++ >= max)
+                        if (i >= max)
                                 return -E2BIG;
+                        ++i;
 
                         if (fatal_signal_pending(current))
                                 return -ERESTARTNOHAND;
diff --git a/include/linux/audit.h b/include/linux/audit.h
index bce729afbcf9..5a6d718adf34 100644
--- a/include/linux/audit.h
+++ b/include/linux/audit.h
@@ -24,6 +24,7 @@
 #define _LINUX_AUDIT_H_
 
 #include <linux/sched.h>
+#include <linux/ptrace.h>
 #include <uapi/linux/audit.h>
 
 struct audit_sig_info {
@@ -157,7 +158,8 @@ void audit_core_dumps(long signr);
 
 static inline void audit_seccomp(unsigned long syscall, long signr, int code)
 {
-        if (unlikely(!audit_dummy_context()))
+        /* Force a record to be reported if a signal was delivered. */
+        if (signr || unlikely(!audit_dummy_context()))
                 __audit_seccomp(syscall, signr, code);
 }
 
diff --git a/include/linux/cpu_rmap.h b/include/linux/cpu_rmap.h
index ac3bbb5b9502..1739510d8994 100644
--- a/include/linux/cpu_rmap.h
+++ b/include/linux/cpu_rmap.h
@@ -13,9 +13,11 @@
 #include <linux/cpumask.h>
 #include <linux/gfp.h>
 #include <linux/slab.h>
+#include <linux/kref.h>
 
 /**
  * struct cpu_rmap - CPU affinity reverse-map
+ * @refcount: kref for object
  * @size: Number of objects to be reverse-mapped
  * @used: Number of objects added
  * @obj: Pointer to array of object pointers
@@ -23,6 +25,7 @@
  *      based on affinity masks
  */
 struct cpu_rmap {
+        struct kref     refcount;
         u16             size, used;
         void            **obj;
         struct {
@@ -33,15 +36,7 @@ struct cpu_rmap {
 #define CPU_RMAP_DIST_INF 0xffff
 
 extern struct cpu_rmap *alloc_cpu_rmap(unsigned int size, gfp_t flags);
-
-/**
- * free_cpu_rmap - free CPU affinity reverse-map
- * @rmap: Reverse-map allocated with alloc_cpu_rmap(), or %NULL
- */
-static inline void free_cpu_rmap(struct cpu_rmap *rmap)
-{
-        kfree(rmap);
-}
+extern int cpu_rmap_put(struct cpu_rmap *rmap);
 
 extern int cpu_rmap_add(struct cpu_rmap *rmap, void *obj);
 extern int cpu_rmap_update(struct cpu_rmap *rmap, u16 index,
diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index 5e4e6170f43a..5fa5afeeb759 100644
--- a/include/linux/interrupt.h
+++ b/include/linux/interrupt.h
@@ -268,11 +268,6 @@ struct irq_affinity_notify {
 extern int
 irq_set_affinity_notifier(unsigned int irq, struct irq_affinity_notify *notify);
 
-static inline void irq_run_affinity_notifiers(void)
-{
-        flush_scheduled_work();
-}
-
 #else /* CONFIG_SMP */
 
 static inline int irq_set_affinity(unsigned int irq, const struct cpumask *m)
diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h
index 00e46376e28f..2bca44b0893c 100644
--- a/include/linux/lockdep.h
+++ b/include/linux/lockdep.h
@@ -524,14 +524,17 @@ static inline void print_irqtrace_events(struct task_struct *curr)
 #ifdef CONFIG_DEBUG_LOCK_ALLOC
 # ifdef CONFIG_PROVE_LOCKING
 #  define rwsem_acquire(l, s, t, i)             lock_acquire(l, s, t, 0, 2, NULL, i)
+#  define rwsem_acquire_nest(l, s, t, n, i)     lock_acquire(l, s, t, 0, 2, n, i)
 #  define rwsem_acquire_read(l, s, t, i)        lock_acquire(l, s, t, 1, 2, NULL, i)
 # else
 #  define rwsem_acquire(l, s, t, i)             lock_acquire(l, s, t, 0, 1, NULL, i)
+#  define rwsem_acquire_nest(l, s, t, n, i)     lock_acquire(l, s, t, 0, 1, n, i)
 #  define rwsem_acquire_read(l, s, t, i)        lock_acquire(l, s, t, 1, 1, NULL, i)
 # endif
 # define rwsem_release(l, n, i)                 lock_release(l, n, i)
 #else
 # define rwsem_acquire(l, s, t, i)              do { } while (0)
+# define rwsem_acquire_nest(l, s, t, n, i)      do { } while (0)
 # define rwsem_acquire_read(l, s, t, i)         do { } while (0)
 # define rwsem_release(l, n, i)                 do { } while (0)
 #endif
diff --git a/include/linux/rbtree_augmented.h b/include/linux/rbtree_augmented.h
index 2ac60c9cf644..fea49b5da12a 100644
--- a/include/linux/rbtree_augmented.h
+++ b/include/linux/rbtree_augmented.h
@@ -123,9 +123,9 @@ __rb_change_child(struct rb_node *old, struct rb_node *new,
 extern void __rb_erase_color(struct rb_node *parent, struct rb_root *root,
         void (*augment_rotate)(struct rb_node *old, struct rb_node *new));
 
-static __always_inline void
-rb_erase_augmented(struct rb_node *node, struct rb_root *root,
-                   const struct rb_augment_callbacks *augment)
+static __always_inline struct rb_node *
+__rb_erase_augmented(struct rb_node *node, struct rb_root *root,
+                     const struct rb_augment_callbacks *augment)
 {
         struct rb_node *child = node->rb_right, *tmp = node->rb_left;
         struct rb_node *parent, *rebalance;
@@ -217,6 +217,14 @@ rb_erase_augmented(struct rb_node *node, struct rb_root *root,
         }
 
         augment->propagate(tmp, NULL);
+        return rebalance;
+}
+
+static __always_inline void
+rb_erase_augmented(struct rb_node *node, struct rb_root *root,
+                   const struct rb_augment_callbacks *augment)
+{
+        struct rb_node *rebalance = __rb_erase_augmented(node, root, augment);
         if (rebalance)
                 __rb_erase_color(rebalance, root, augment->rotate);
 }
diff --git a/include/linux/rwsem.h b/include/linux/rwsem.h
index 54bd7cd7ecbd..413cc11e414a 100644
--- a/include/linux/rwsem.h
+++ b/include/linux/rwsem.h
@@ -125,8 +125,17 @@ extern void downgrade_write(struct rw_semaphore *sem);
  */
 extern void down_read_nested(struct rw_semaphore *sem, int subclass);
 extern void down_write_nested(struct rw_semaphore *sem, int subclass);
+extern void _down_write_nest_lock(struct rw_semaphore *sem, struct lockdep_map *nest_lock);
+
+# define down_write_nest_lock(sem, nest_lock)                   \
+do {                                                            \
+        typecheck(struct lockdep_map *, &(nest_lock)->dep_map); \
+        _down_write_nest_lock(sem, &(nest_lock)->dep_map);      \
+} while (0);
+
 #else
 # define down_read_nested(sem, subclass)                down_read(sem)
+# define down_write_nest_lock(sem, nest_lock)   down_read(sem)
 # define down_write_nested(sem, subclass)       down_write(sem)
 #endif
 
diff --git a/include/uapi/linux/audit.h b/include/uapi/linux/audit.h
index 76352ac45f24..9f096f1c0907 100644
--- a/include/uapi/linux/audit.h
+++ b/include/uapi/linux/audit.h
@@ -26,7 +26,6 @@
 
 #include <linux/types.h>
 #include <linux/elf-em.h>
-#include <linux/ptrace.h>
 
 /* The netlink messages for the audit system is divided into blocks:
  * 1000 - 1099 are for commanding the audit system
@@ -106,6 +105,7 @@
 #define AUDIT_MMAP              1323    /* Record showing descriptor and flags in mmap */
 #define AUDIT_NETFILTER_PKT     1324    /* Packets traversing netfilter chains */
 #define AUDIT_NETFILTER_CFG     1325    /* Netfilter chain modifications */
+#define AUDIT_SECCOMP           1326    /* Secure Computing event */
 
 #define AUDIT_AVC               1400    /* SE Linux avc denial or grant */
 #define AUDIT_SELINUX_ERR       1401    /* Internal SE Linux Errors */
diff --git a/kernel/audit.c b/kernel/audit.c
index 40414e9143db..d596e5355f15 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -272,6 +272,8 @@ static int audit_log_config_change(char *function_name, int new, int old,
         int rc = 0;
 
         ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_CONFIG_CHANGE);
+        if (unlikely(!ab))
+                return rc;
         audit_log_format(ab, "%s=%d old=%d auid=%u ses=%u", function_name, new,
                          old, from_kuid(&init_user_ns, loginuid), sessionid);
         if (sid) {
@@ -619,6 +621,8 @@ static int audit_log_common_recv_msg(struct audit_buffer **ab, u16 msg_type,
         }
 
         *ab = audit_log_start(NULL, GFP_KERNEL, msg_type);
+        if (unlikely(!*ab))
+                return rc;
         audit_log_format(*ab, "pid=%d uid=%u auid=%u ses=%u",
                          task_tgid_vnr(current),
                          from_kuid(&init_user_ns, current_uid()),
@@ -1097,6 +1101,23 @@ static inline void audit_get_stamp(struct audit_context *ctx,
         }
 }
 
+/*
+ * Wait for auditd to drain the queue a little
+ */
+static void wait_for_auditd(unsigned long sleep_time)
+{
+        DECLARE_WAITQUEUE(wait, current);
+        set_current_state(TASK_INTERRUPTIBLE);
+        add_wait_queue(&audit_backlog_wait, &wait);
+
+        if (audit_backlog_limit &&
+            skb_queue_len(&audit_skb_queue) > audit_backlog_limit)
+                schedule_timeout(sleep_time);
+
+        __set_current_state(TASK_RUNNING);
+        remove_wait_queue(&audit_backlog_wait, &wait);
+}
+
 /* Obtain an audit buffer.  This routine does locking to obtain the
  * audit buffer, but then no locking is required for calls to
  * audit_log_*format.  If the tsk is a task that is currently in a
@@ -1142,20 +1163,13 @@ struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask,
 
         while (audit_backlog_limit
                && skb_queue_len(&audit_skb_queue) > audit_backlog_limit + reserve) {
-                if (gfp_mask & __GFP_WAIT && audit_backlog_wait_time
-                    && time_before(jiffies, timeout_start + audit_backlog_wait_time)) {
+                if (gfp_mask & __GFP_WAIT && audit_backlog_wait_time) {
+                        unsigned long sleep_time;
 
-                        /* Wait for auditd to drain the queue a little */
-                        DECLARE_WAITQUEUE(wait, current);
-                        set_current_state(TASK_INTERRUPTIBLE);
-                        add_wait_queue(&audit_backlog_wait, &wait);
-
-                        if (audit_backlog_limit &&
-                            skb_queue_len(&audit_skb_queue) > audit_backlog_limit)
-                                schedule_timeout(timeout_start + audit_backlog_wait_time - jiffies);
-
-                        __set_current_state(TASK_RUNNING);
-                        remove_wait_queue(&audit_backlog_wait, &wait);
+                        sleep_time = timeout_start + audit_backlog_wait_time -
+                                        jiffies;
+                        if ((long)sleep_time > 0)
+                                wait_for_auditd(sleep_time);
                         continue;
                 }
                 if (audit_rate_check() && printk_ratelimit())
diff --git a/kernel/audit_tree.c b/kernel/audit_tree.c
index e81175ef25f8..642a89c4f3d6 100644
--- a/kernel/audit_tree.c
+++ b/kernel/audit_tree.c
@@ -449,11 +449,26 @@ static int tag_chunk(struct inode *inode, struct audit_tree *tree)
         return 0;
 }
 
+static void audit_log_remove_rule(struct audit_krule *rule)
+{
+        struct audit_buffer *ab;
+
+        ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_CONFIG_CHANGE);
+        if (unlikely(!ab))
+                return;
+        audit_log_format(ab, "op=");
+        audit_log_string(ab, "remove rule");
+        audit_log_format(ab, " dir=");
+        audit_log_untrustedstring(ab, rule->tree->pathname);
+        audit_log_key(ab, rule->filterkey);
+        audit_log_format(ab, " list=%d res=1", rule->listnr);
+        audit_log_end(ab);
+}
+
 static void kill_rules(struct audit_tree *tree)
 {
         struct audit_krule *rule, *next;
         struct audit_entry *entry;
-        struct audit_buffer *ab;
 
         list_for_each_entry_safe(rule, next, &tree->rules, rlist) {
                 entry = container_of(rule, struct audit_entry, rule);
@@ -461,14 +476,7 @@ static void kill_rules(struct audit_tree *tree)
                 list_del_init(&rule->rlist);
                 if (rule->tree) {
                         /* not a half-baked one */
-                        ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_CONFIG_CHANGE);
-                        audit_log_format(ab, "op=");
-                        audit_log_string(ab, "remove rule");
-                        audit_log_format(ab, " dir=");
-                        audit_log_untrustedstring(ab, rule->tree->pathname);
-                        audit_log_key(ab, rule->filterkey);
-                        audit_log_format(ab, " list=%d res=1", rule->listnr);
-                        audit_log_end(ab);
+                        audit_log_remove_rule(rule);
                         rule->tree = NULL;
                         list_del_rcu(&entry->list);
                         list_del(&entry->rule.list);
diff --git a/kernel/audit_watch.c b/kernel/audit_watch.c
index 4a599f699adc..22831c4d369c 100644
--- a/kernel/audit_watch.c
+++ b/kernel/audit_watch.c
@@ -240,6 +240,8 @@ static void audit_watch_log_rule_change(struct audit_krule *r, struct audit_watc
         if (audit_enabled) {
                 struct audit_buffer *ab;
                 ab = audit_log_start(NULL, GFP_NOFS, AUDIT_CONFIG_CHANGE);
+                if (unlikely(!ab))
+                        return;
                 audit_log_format(ab, "auid=%u ses=%u op=",
                                  from_kuid(&init_user_ns, audit_get_loginuid(current)),
                                  audit_get_sessionid(current));
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index e37e6a12c5e3..a371f857a0a9 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -1464,14 +1464,14 @@ static void show_special(struct audit_context *context, int *call_panic)
                         audit_log_end(ab);
                         ab = audit_log_start(context, GFP_KERNEL,
                                              AUDIT_IPC_SET_PERM);
+                        if (unlikely(!ab))
+                                return;
                         audit_log_format(ab,
                                 "qbytes=%lx ouid=%u ogid=%u mode=%#ho",
                                 context->ipc.qbytes,
                                 context->ipc.perm_uid,
                                 context->ipc.perm_gid,
                                 context->ipc.perm_mode);
-                        if (!ab)
-                                return;
                 }
                 break; }
         case AUDIT_MQ_OPEN: {
@@ -2675,7 +2675,7 @@ void __audit_mmap_fd(int fd, int flags)
         context->type = AUDIT_MMAP;
 }
 
-static void audit_log_abend(struct audit_buffer *ab, char *reason, long signr)
+static void audit_log_task(struct audit_buffer *ab)
 {
         kuid_t auid, uid;
         kgid_t gid;
@@ -2693,6 +2693,11 @@ static void audit_log_abend(struct audit_buffer *ab, char *reason, long signr)
         audit_log_task_context(ab);
         audit_log_format(ab, " pid=%d comm=", current->pid);
         audit_log_untrustedstring(ab, current->comm);
+}
+
+static void audit_log_abend(struct audit_buffer *ab, char *reason, long signr)
+{
+        audit_log_task(ab);
         audit_log_format(ab, " reason=");
         audit_log_string(ab, reason);
         audit_log_format(ab, " sig=%ld", signr);
@@ -2715,6 +2720,8 @@ void audit_core_dumps(long signr)
                 return;
 
         ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_ANOM_ABEND);
+        if (unlikely(!ab))
+                return;
         audit_log_abend(ab, "memory violation", signr);
         audit_log_end(ab);
 }
@@ -2723,8 +2730,11 @@ void __audit_seccomp(unsigned long syscall, long signr, int code)
 {
         struct audit_buffer *ab;
 
-        ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_ANOM_ABEND);
-        audit_log_abend(ab, "seccomp", signr);
+        ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_SECCOMP);
+        if (unlikely(!ab))
+                return;
+        audit_log_task(ab);
+        audit_log_format(ab, " sig=%ld", signr);
         audit_log_format(ab, " syscall=%ld", syscall);
         audit_log_format(ab, " compat=%d", is_compat_task());
         audit_log_format(ab, " ip=0x%lx", KSTK_EIP(current));
diff --git a/kernel/rwsem.c b/kernel/rwsem.c
index 6850f53e02d8..b3c6c3fcd847 100644
--- a/kernel/rwsem.c
+++ b/kernel/rwsem.c
@@ -116,6 +116,16 @@ void down_read_nested(struct rw_semaphore *sem, int subclass)
 
 EXPORT_SYMBOL(down_read_nested);
 
+void _down_write_nest_lock(struct rw_semaphore *sem, struct lockdep_map *nest)
+{
+        might_sleep();
+        rwsem_acquire_nest(&sem->dep_map, 0, 0, nest, _RET_IP_);
+
+        LOCK_CONTENDED(sem, __down_write_trylock, __down_write);
+}
+
+EXPORT_SYMBOL(_down_write_nest_lock);
+
 void down_write_nested(struct rw_semaphore *sem, int subclass)
 {
         might_sleep();
diff --git a/lib/cpu_rmap.c b/lib/cpu_rmap.c
index 145dec5267c9..5fbed5caba6e 100644
--- a/lib/cpu_rmap.c
+++ b/lib/cpu_rmap.c
@@ -45,6 +45,7 @@ struct cpu_rmap *alloc_cpu_rmap(unsigned int size, gfp_t flags)
         if (!rmap)
                 return NULL;
 
+        kref_init(&rmap->refcount);
         rmap->obj = (void **)((char *)rmap + obj_offset);
 
         /* Initially assign CPUs to objects on a rota, since we have
@@ -63,6 +64,35 @@ struct cpu_rmap *alloc_cpu_rmap(unsigned int size, gfp_t flags)
 }
 EXPORT_SYMBOL(alloc_cpu_rmap);
 
+/**
+ * cpu_rmap_release - internal reclaiming helper called from kref_put
+ * @ref: kref to struct cpu_rmap
+ */
+static void cpu_rmap_release(struct kref *ref)
+{
+        struct cpu_rmap *rmap = container_of(ref, struct cpu_rmap, refcount);
+        kfree(rmap);
+}
+
+/**
+ * cpu_rmap_get - internal helper to get new ref on a cpu_rmap
+ * @rmap: reverse-map allocated with alloc_cpu_rmap()
+ */
+static inline void cpu_rmap_get(struct cpu_rmap *rmap)
+{
+        kref_get(&rmap->refcount);
+}
+
+/**
+ * cpu_rmap_put - release ref on a cpu_rmap
+ * @rmap: reverse-map allocated with alloc_cpu_rmap()
+ */
+int cpu_rmap_put(struct cpu_rmap *rmap)
+{
+        return kref_put(&rmap->refcount, cpu_rmap_release);
+}
+EXPORT_SYMBOL(cpu_rmap_put);
+
 /* Reevaluate nearest object for given CPU, comparing with the given
  * neighbours at the given distance.
  */
@@ -197,8 +227,7 @@ struct irq_glue {
  * free_irq_cpu_rmap - free a CPU affinity reverse-map used for IRQs
  * @rmap: Reverse-map allocated with alloc_irq_cpu_map(), or %NULL
  *
- * Must be called in process context, before freeing the IRQs, and
- * without holding any locks required by global workqueue items.
+ * Must be called in process context, before freeing the IRQs.
  */
 void free_irq_cpu_rmap(struct cpu_rmap *rmap)
 {
@@ -212,12 +241,18 @@ void free_irq_cpu_rmap(struct cpu_rmap *rmap)
                 glue = rmap->obj[index];
                 irq_set_affinity_notifier(glue->notify.irq, NULL);
         }
-        irq_run_affinity_notifiers();
 
-        kfree(rmap);
+        cpu_rmap_put(rmap);
 }
 EXPORT_SYMBOL(free_irq_cpu_rmap);
 
+/**
+ * irq_cpu_rmap_notify - callback for IRQ subsystem when IRQ affinity updated
+ * @notify: struct irq_affinity_notify passed by irq/manage.c
+ * @mask: cpu mask for new SMP affinity
+ *
+ * This is executed in workqueue context.
+ */
 static void
 irq_cpu_rmap_notify(struct irq_affinity_notify *notify, const cpumask_t *mask)
 {
@@ -230,10 +265,16 @@ irq_cpu_rmap_notify(struct irq_affinity_notify *notify, const cpumask_t *mask)
                 pr_warning("irq_cpu_rmap_notify: update failed: %d\n", rc);
 }
 
+/**
+ * irq_cpu_rmap_release - reclaiming callback for IRQ subsystem
+ * @ref: kref to struct irq_affinity_notify passed by irq/manage.c
+ */
 static void irq_cpu_rmap_release(struct kref *ref)
 {
         struct irq_glue *glue =
                 container_of(ref, struct irq_glue, notify.kref);
+
+        cpu_rmap_put(glue->rmap);
         kfree(glue);
 }
 
@@ -258,10 +299,13 @@ int irq_cpu_rmap_add(struct cpu_rmap *rmap, int irq)
         glue->notify.notify = irq_cpu_rmap_notify;
         glue->notify.release = irq_cpu_rmap_release;
         glue->rmap = rmap;
+        cpu_rmap_get(rmap);
         glue->index = cpu_rmap_add(rmap, glue);
         rc = irq_set_affinity_notifier(irq, &glue->notify);
-        if (rc)
+        if (rc) {
+                cpu_rmap_put(glue->rmap);
                 kfree(glue);
+        }
         return rc;
 }
 EXPORT_SYMBOL(irq_cpu_rmap_add);
diff --git a/lib/rbtree.c b/lib/rbtree.c
index 4f56a11d67fa..c0e31fe2fabf 100644
--- a/lib/rbtree.c
+++ b/lib/rbtree.c
@@ -194,8 +194,12 @@ __rb_insert(struct rb_node *node, struct rb_root *root,
         }
 }
 
-__always_inline void
-__rb_erase_color(struct rb_node *parent, struct rb_root *root,
+/*
+ * Inline version for rb_erase() use - we want to be able to inline
+ * and eliminate the dummy_rotate callback there
+ */
+static __always_inline void
+____rb_erase_color(struct rb_node *parent, struct rb_root *root,
         void (*augment_rotate)(struct rb_node *old, struct rb_node *new))
 {
         struct rb_node *node = NULL, *sibling, *tmp1, *tmp2;
@@ -355,6 +359,13 @@ __rb_erase_color(struct rb_node *parent, struct rb_root *root,
                 }
         }
 }
+
+/* Non-inline version for rb_erase_augmented() use */
+void __rb_erase_color(struct rb_node *parent, struct rb_root *root,
+        void (*augment_rotate)(struct rb_node *old, struct rb_node *new))
+{
+        ____rb_erase_color(parent, root, augment_rotate);
+}
 EXPORT_SYMBOL(__rb_erase_color);
 
 /*
@@ -380,7 +391,10 @@ EXPORT_SYMBOL(rb_insert_color);
 
 void rb_erase(struct rb_node *node, struct rb_root *root)
 {
-        rb_erase_augmented(node, root, &dummy_callbacks);
+        struct rb_node *rebalance;
+        rebalance = __rb_erase_augmented(node, root, &dummy_callbacks);
+        if (rebalance)
+                ____rb_erase_color(rebalance, root, dummy_rotate);
 }
 EXPORT_SYMBOL(rb_erase);
 
diff --git a/mm/bootmem.c b/mm/bootmem.c
index 1324cd74faec..b93376c39b61 100644
--- a/mm/bootmem.c
+++ b/mm/bootmem.c
@@ -185,10 +185,23 @@ static unsigned long __init free_all_bootmem_core(bootmem_data_t *bdata)
 
         while (start < end) {
                 unsigned long *map, idx, vec;
+                unsigned shift;
 
                 map = bdata->node_bootmem_map;
                 idx = start - bdata->node_min_pfn;
+                shift = idx & (BITS_PER_LONG - 1);
+                /*
+                 * vec holds at most BITS_PER_LONG map bits,
+                 * bit 0 corresponds to start.
+                 */
                 vec = ~map[idx / BITS_PER_LONG];
+
+                if (shift) {
+                        vec >>= shift;
+                        if (end - start >= BITS_PER_LONG)
+                                vec |= ~map[idx / BITS_PER_LONG + 1] <<
+                                        (BITS_PER_LONG - shift);
+                }
                 /*
                  * If we have a properly aligned and fully unreserved
                  * BITS_PER_LONG block of pages in front of us, free
@@ -201,19 +214,18 @@ static unsigned long __init free_all_bootmem_core(bootmem_data_t *bdata)
                         count += BITS_PER_LONG;
                         start += BITS_PER_LONG;
                 } else {
-                        unsigned long off = 0;
+                        unsigned long cur = start;
 
-                        vec >>= start & (BITS_PER_LONG - 1);
-                        while (vec) {
+                        start = ALIGN(start + 1, BITS_PER_LONG);
+                        while (vec && cur != start) {
                                 if (vec & 1) {
-                                        page = pfn_to_page(start + off);
+                                        page = pfn_to_page(cur);
                                         __free_pages_bootmem(page, 0);
                                         count++;
                                 }
                                 vec >>= 1;
-                                off++;
+                                ++cur;
                         }
-                        start = ALIGN(start + 1, BITS_PER_LONG);
                 }
         }
 
diff --git a/mm/compaction.c b/mm/compaction.c
index 2c570432aa56..c62bd063d766 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -1144,7 +1144,7 @@ static int compact_node(int nid)
 }
 
 /* Compact all nodes in the system */
-static int compact_nodes(void)
+static void compact_nodes(void)
 {
         int nid;
 
@@ -1153,8 +1153,6 @@ static int compact_nodes(void)
 
         for_each_online_node(nid)
                 compact_node(nid);
-
-        return COMPACT_COMPLETE;
 }
 
 /* The written value is actually unused, all memory is compacted */
@@ -1165,7 +1163,7 @@ int sysctl_compaction_handler(struct ctl_table *table, int write,
                         void __user *buffer, size_t *length, loff_t *ppos)
 {
         if (write)
-                return compact_nodes();
+                compact_nodes();
 
         return 0;
 }
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 9e894edc7811..6001ee6347a9 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -1819,9 +1819,19 @@ int split_huge_page(struct page *page)
 
         BUG_ON(is_huge_zero_pfn(page_to_pfn(page)));
         BUG_ON(!PageAnon(page));
-        anon_vma = page_lock_anon_vma_read(page);
+
+        /*
+         * The caller does not necessarily hold an mmap_sem that would prevent
+         * the anon_vma disappearing so we first we take a reference to it
+         * and then lock the anon_vma for write. This is similar to
+         * page_lock_anon_vma_read except the write lock is taken to serialise
+         * against parallel split or collapse operations.
+         */
+        anon_vma = page_get_anon_vma(page);
         if (!anon_vma)
                 goto out;
+        anon_vma_lock_write(anon_vma);
+
         ret = 0;
         if (!PageCompound(page))
                 goto out_unlock;
@@ -1832,7 +1842,8 @@ int split_huge_page(struct page *page)
 
         BUG_ON(PageCompound(page));
 out_unlock:
-        page_unlock_anon_vma_read(anon_vma);
+        anon_vma_unlock(anon_vma);
+        put_anon_vma(anon_vma);
 out:
         return ret;
 }
diff --git a/mm/memblock.c b/mm/memblock.c
index 625905523c2a..88adc8afb610 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -314,7 +314,8 @@ static void __init_memblock memblock_merge_regions(struct memblock_type *type)
                 }
 
                 this->size += next->size;
-                memmove(next, next + 1, (type->cnt - (i + 1)) * sizeof(*next));
+                /* move forward from next + 1, index of which is i + 2 */
+                memmove(next, next + 1, (type->cnt - (i + 2)) * sizeof(*next));
                 type->cnt--;
         }
 }
diff --git a/mm/migrate.c b/mm/migrate.c
index 3b676b0c5c3e..c38778610aa8 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -1679,9 +1679,21 @@ int migrate_misplaced_transhuge_page(struct mm_struct *mm,
         page_xchg_last_nid(new_page, page_last_nid(page));
 
         isolated = numamigrate_isolate_page(pgdat, page);
-        if (!isolated) {
+
+        /*
+         * Failing to isolate or a GUP pin prevents migration. The expected
+         * page count is 2. 1 for anonymous pages without a mapping and 1
+         * for the callers pin. If the page was isolated, the page will
+         * need to be put back on the LRU.
+         */
+        if (!isolated || page_count(page) != 2) {
                 count_vm_events(PGMIGRATE_FAIL, HPAGE_PMD_NR);
                 put_page(new_page);
+                if (isolated) {
+                        putback_lru_page(page);
+                        isolated = 0;
+                        goto out;
+                }
                 goto out_keep_locked;
         }
 
diff --git a/mm/mmap.c b/mm/mmap.c
index f54b235f29a9..35730ee9d515 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -2886,7 +2886,7 @@ static void vm_lock_anon_vma(struct mm_struct *mm, struct anon_vma *anon_vma)
                  * The LSB of head.next can't change from under us
                  * because we hold the mm_all_locks_mutex.
                  */
-                down_write(&anon_vma->root->rwsem);
+                down_write_nest_lock(&anon_vma->root->rwsem, &mm->mmap_sem);
                 /*
                  * We can safely modify head.next after taking the
                  * anon_vma->root->rwsem. If some other vma in this mm shares
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index ece7b8e8a5b6..df2022ff0c8a 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5585,7 +5585,7 @@ static inline int pfn_to_bitidx(struct zone *zone, unsigned long pfn)
         pfn &= (PAGES_PER_SECTION-1);
         return (pfn >> pageblock_order) * NR_PAGEBLOCK_BITS;
 #else
-        pfn = pfn - zone->zone_start_pfn;
+        pfn = pfn - round_down(zone->zone_start_pfn, pageblock_nr_pages);
         return (pfn >> pageblock_order) * NR_PAGEBLOCK_BITS;
 #endif /* CONFIG_SPARSEMEM */
 }