diff --git a/arch/x86/vdso/vclock_gettime.c b/arch/x86/vdso/vclock_gettime.c
index c74436e..1797387 100644
--- a/arch/x86/vdso/vclock_gettime.c
+++ b/arch/x86/vdso/vclock_gettime.c
@@ -178,13 +178,15 @@ notrace static int __always_inline do_realtime(struct timespec *ts)
 
 	ts->tv_nsec = 0;
 	do {
-		seq = read_seqcount_begin(&gtod->seq);
+		seq = __read_seqcount_begin(&gtod->seq);
+		smp_rmb();
 		mode = gtod->clock.vclock_mode;
 		ts->tv_sec = gtod->wall_time_sec;
 		ns = gtod->wall_time_snsec;
 		ns += vgetsns(&mode);
 		ns >>= gtod->clock.shift;
-	} while (unlikely(read_seqcount_retry(&gtod->seq, seq)));
+		smp_rmb();
+	} while (unlikely(__read_seqcount_retry(&gtod->seq, seq)));
 
 	timespec_add_ns(ts, ns);
 	return mode;
@@ -198,13 +200,15 @@ notrace static int do_monotonic(struct timespec *ts)
 
 	ts->tv_nsec = 0;
 	do {
-		seq = read_seqcount_begin(&gtod->seq);
+		seq = __read_seqcount_begin(&gtod->seq);
+		smp_rmb();
 		mode = gtod->clock.vclock_mode;
 		ts->tv_sec = gtod->monotonic_time_sec;
 		ns = gtod->monotonic_time_snsec;
 		ns += vgetsns(&mode);
 		ns >>= gtod->clock.shift;
-	} while (unlikely(read_seqcount_retry(&gtod->seq, seq)));
+		smp_rmb();
+	} while (unlikely(__read_seqcount_retry(&gtod->seq, seq)));
 	timespec_add_ns(ts, ns);
 
 	return mode;
@@ -214,10 +218,12 @@ notrace static int do_realtime_coarse(struct timespec *ts)
 {
 	unsigned long seq;
 	do {
-		seq = read_seqcount_begin(&gtod->seq);
+		seq = __read_seqcount_begin(&gtod->seq);
+		smp_rmb();
 		ts->tv_sec = gtod->wall_time_coarse.tv_sec;
 		ts->tv_nsec = gtod->wall_time_coarse.tv_nsec;
-	} while (unlikely(read_seqcount_retry(&gtod->seq, seq)));
+		smp_rmb();
+	} while (unlikely(__read_seqcount_retry(&gtod->seq, seq)));
 	return 0;
 }
 
@@ -225,10 +231,12 @@ notrace static int do_monotonic_coarse(struct timespec *ts)
 {
 	unsigned long seq;
 	do {
-		seq = read_seqcount_begin(&gtod->seq);
+		seq = __read_seqcount_begin(&gtod->seq);
+		smp_rmb();
 		ts->tv_sec = gtod->monotonic_time_coarse.tv_sec;
 		ts->tv_nsec = gtod->monotonic_time_coarse.tv_nsec;
-	} while (unlikely(read_seqcount_retry(&gtod->seq, seq)));
+		smp_rmb();
+	} while (unlikely(__read_seqcount_retry(&gtod->seq, seq)));
 
 	return 0;
 }
diff --git a/fs/dcache.c b/fs/dcache.c
index 96655f4..9f97a88 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -2259,7 +2259,7 @@ static void __d_move(struct dentry * dentry, struct dentry * target)
 	dentry_lock_for_move(dentry, target);
 
 	write_seqcount_begin(&dentry->d_seq);
-	write_seqcount_begin(&target->d_seq);
+	write_seqcount_begin_nested(&target->d_seq, DENTRY_D_LOCK_NESTED);
 
 	/* __d_drop does write_seqcount_barrier, but they're OK to nest. */
 
@@ -2391,7 +2391,7 @@ static void __d_materialise_dentry(struct dentry *dentry, struct dentry *anon)
 	dentry_lock_for_move(anon, dentry);
 
 	write_seqcount_begin(&dentry->d_seq);
-	write_seqcount_begin(&anon->d_seq);
+	write_seqcount_begin_nested(&anon->d_seq, DENTRY_D_LOCK_NESTED);
 
 	dparent = dentry->d_parent;
 
diff --git a/fs/fs_struct.c b/fs/fs_struct.c
index d8ac61d..7dca743 100644
--- a/fs/fs_struct.c
+++ b/fs/fs_struct.c
@@ -161,6 +161,6 @@ EXPORT_SYMBOL(current_umask);
 struct fs_struct init_fs = {
 	.users		= 1,
 	.lock		= __SPIN_LOCK_UNLOCKED(init_fs.lock),
-	.seq		= SEQCNT_ZERO,
+	.seq		= SEQCNT_ZERO(init_fs.seq),
 	.umask		= 0022,
 };
diff --git a/include/linux/init_task.h b/include/linux/init_task.h
index 5cd0f09..b0ed422 100644
--- a/include/linux/init_task.h
+++ b/include/linux/init_task.h
@@ -32,10 +32,10 @@ extern struct fs_struct init_fs;
 #endif
 
 #ifdef CONFIG_CPUSETS
-#define INIT_CPUSET_SEQ							\
-	.mems_allowed_seq = SEQCNT_ZERO,
+#define INIT_CPUSET_SEQ(tsk)							\
+	.mems_allowed_seq = SEQCNT_ZERO(tsk.mems_allowed_seq),
 #else
-#define INIT_CPUSET_SEQ
+#define INIT_CPUSET_SEQ(tsk)
 #endif
 
 #define INIT_SIGNALS(sig) {						\
@@ -220,7 +220,7 @@ extern struct task_group root_task_group;
 	INIT_FTRACE_GRAPH						\
 	INIT_TRACE_RECURSION						\
 	INIT_TASK_RCU_PREEMPT(tsk)					\
-	INIT_CPUSET_SEQ							\
+	INIT_CPUSET_SEQ(tsk)						\
 	INIT_VTIME(tsk)							\
 }
 
diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h
index f1e877b..75e33fa 100644
--- a/include/linux/lockdep.h
+++ b/include/linux/lockdep.h
@@ -510,6 +510,21 @@ static inline void print_irqtrace_events(struct task_struct *curr)
 
 #ifdef CONFIG_DEBUG_LOCK_ALLOC
 # ifdef CONFIG_PROVE_LOCKING
+#  define seqcount_acquire(l, s, t, i)		lock_acquire(l, s, t, 0, 2, NULL, i)
+#  define seqcount_acquire_read(l, s, t, i)	lock_acquire(l, s, t, 2, 2, NULL, i)
+# else
+#  define seqcount_acquire(l, s, t, i)		lock_acquire(l, s, t, 0, 1, NULL, i)
+#  define seqcount_acquire_read(l, s, t, i)	lock_acquire(l, s, t, 2, 1, NULL, i)
+# endif
+# define seqcount_release(l, n, i)		lock_release(l, n, i)
+#else
+# define seqcount_acquire(l, s, t, i)		do { } while (0)
+# define seqcount_acquire_read(l, s, t, i)	do { } while (0)
+# define seqcount_release(l, n, i)		do { } while (0)
+#endif
+
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+# ifdef CONFIG_PROVE_LOCKING
 #  define mutex_acquire(l, s, t, i)		lock_acquire(l, s, t, 0, 2, NULL, i)
 #  define mutex_acquire_nest(l, s, t, n, i)	lock_acquire(l, s, t, 0, 2, n, i)
 # else
diff --git a/include/linux/seqlock.h b/include/linux/seqlock.h
index 1829905..2178aea 100644
--- a/include/linux/seqlock.h
+++ b/include/linux/seqlock.h
@@ -28,6 +28,7 @@
 
 #include <linux/spinlock.h>
 #include <linux/preempt.h>
+#include <linux/lockdep.h>
 #include <asm/processor.h>
 
 /*
@@ -38,10 +39,58 @@
  */
 typedef struct seqcount {
 	unsigned sequence;
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+	struct lockdep_map dep_map;
+#endif
 } seqcount_t;
 
-#define SEQCNT_ZERO { 0 }
-#define seqcount_init(x)	do { *(x) = (seqcount_t) SEQCNT_ZERO; } while (0)
+
+
+
+static inline void __seqcount_init(seqcount_t *s, const char *name,
+					  struct lock_class_key *key)
+{
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+	/*
+	 * Make sure we are not reinitializing a held lock:
+	 */
+	lockdep_init_map(&s->dep_map, name, key, 0);
+#endif
+	s->sequence = 0;
+}
+
+
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+# define SEQCOUNT_DEP_MAP_INIT(lockname) \
+		.dep_map = { .name = #lockname } \
+
+# define seqcount_init(s)				\
+	do {						\
+		static struct lock_class_key __key;	\
+		__seqcount_init((s), #s, &__key);	\
+	} while (0)
+
+static inline void seqcount_reader_access(const seqcount_t *s)
+{
+	seqcount_t *l = (seqcount_t *)s;
+	unsigned long flags;
+
+	preempt_disable();
+	local_irq_save(flags);
+	seqcount_acquire_read(&l->dep_map, 0, 0, _RET_IP_);
+	seqcount_release(&l->dep_map, 1, _RET_IP_);
+	local_irq_restore(flags);
+	preempt_enable();
+}
+
+#else
+# define SEQCOUNT_DEP_MAP_INIT(lockname)
+# define seqcount_init(s) __seqcount_init(s, NULL, NULL)
+# define seqcount_reader_access(x)
+#endif
+
+#define SEQCNT_ZERO(lockname) { .sequence = 0, SEQCOUNT_DEP_MAP_INIT(lockname)}
+
 
 /**
  * __read_seqcount_begin - begin a seq-read critical section (without barrier)
@@ -81,6 +130,8 @@ repeat:
 static inline unsigned read_seqcount_begin(const seqcount_t *s)
 {
 	unsigned ret = __read_seqcount_begin(s);
+
+	seqcount_reader_access(s);
 	smp_rmb();
 	return ret;
 }
@@ -102,6 +153,8 @@ static inline unsigned read_seqcount_begin(const seqcount_t *s)
 static inline unsigned raw_seqcount_begin(const seqcount_t *s)
 {
 	unsigned ret = ACCESS_ONCE(s->sequence);
+
+	seqcount_reader_access(s);
 	smp_rmb();
 	return ret & ~1;
 }
@@ -150,10 +203,23 @@ static inline void write_seqcount_begin(seqcount_t *s)
 {
 	s->sequence++;
 	smp_wmb();
+	seqcount_acquire(&s->dep_map, 0, 0, _RET_IP_);
+}
+
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+static inline void write_seqcount_begin_nested(seqcount_t *s, int subclass)
+{
+	s->sequence++;
+	smp_wmb();
+	seqcount_acquire(&s->dep_map, subclass, 0, _RET_IP_);
 }
+#else
+# define write_seqcount_begin_nested(s, subclass)	write_seqcount_begin(s)
+#endif
 
 static inline void write_seqcount_end(seqcount_t *s)
 {
+	seqcount_release(&s->dep_map, 1, _RET_IP_);
 	smp_wmb();
 	s->sequence++;
 }
@@ -182,7 +248,7 @@ typedef struct {
  */
 #define __SEQLOCK_UNLOCKED(lockname)			\
 	{						\
-		.seqcount = SEQCNT_ZERO,		\
+		.seqcount = SEQCNT_ZERO(lockname),	\
 		.lock =	__SPIN_LOCK_UNLOCKED(lockname)	\
 	}
 
diff --git a/mm/filemap_xip.c b/mm/filemap_xip.c
index 28fe26b..d8d9fe3 100644
--- a/mm/filemap_xip.c
+++ b/mm/filemap_xip.c
@@ -26,7 +26,7 @@
  * of ZERO_PAGE(), such as /dev/zero
  */
 static DEFINE_MUTEX(xip_sparse_mutex);
-static seqcount_t xip_sparse_seq = SEQCNT_ZERO;
+static seqcount_t xip_sparse_seq = SEQCNT_ZERO(xip_sparse_seq);
 static struct page *__xip_sparse_page;
 
 /* called under xip_sparse_mutex */
