Merge branch 'akpm' (patches from Andrew)

Merge more updates from Andrew Morton:

 - a few block updates that fell in my lap

 - lib/ updates

 - checkpatch

 - autofs

 - ipc

 - a ton of misc other things

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (100 commits)
  mm: split gfp_mask and mapping flags into separate fields
  fs: use mapping_set_error instead of opencoded set_bit
  treewide: remove redundant #include <linux/kconfig.h>
  hung_task: allow hung_task_panic when hung_task_warnings is 0
  kthread: add kerneldoc for kthread_create()
  kthread: better support freezable kthread workers
  kthread: allow to modify delayed kthread work
  kthread: allow to cancel kthread work
  kthread: initial support for delayed kthread work
  kthread: detect when a kthread work is used by more workers
  kthread: add kthread_destroy_worker()
  kthread: add kthread_create_worker*()
  kthread: allow to call __kthread_create_on_node() with va_list args
  kthread/smpboot: do not park in kthread_create_on_cpu()
  kthread: kthread worker API cleanup
  kthread: rename probe_kthread_data() to kthread_probe_data()
  scripts/tags.sh: enable code completion in VIM
  mm: kmemleak: avoid using __va() on addresses that don't have a lowmem mapping
  kdump, vmcoreinfo: report memory sections virtual addresses
  ipc/sem.c: add cond_resched in exit_sme
  ...

17 files changed, 357 insertions, 238 deletions

diff --git a/include/linux/auto_dev-ioctl.h b/include/linux/auto_dev-ioctl.h
index 7caaf298f539..28c15050ebe6 100644
--- a/include/linux/auto_dev-ioctl.h
+++ b/include/linux/auto_dev-ioctl.h
@@ -10,214 +10,5 @@
 #ifndef _LINUX_AUTO_DEV_IOCTL_H
 #define _LINUX_AUTO_DEV_IOCTL_H
 
-#include <linux/auto_fs.h>
-#include <linux/string.h>
-
-#define AUTOFS_DEVICE_NAME		"autofs"
-
-#define AUTOFS_DEV_IOCTL_VERSION_MAJOR	1
-#define AUTOFS_DEV_IOCTL_VERSION_MINOR	0
-
-#define AUTOFS_DEVID_LEN		16
-
-#define AUTOFS_DEV_IOCTL_SIZE		sizeof(struct autofs_dev_ioctl)
-
-/*
- * An ioctl interface for autofs mount point control.
- */
-
-struct args_protover {
-	__u32	version;
-};
-
-struct args_protosubver {
-	__u32	sub_version;
-};
-
-struct args_openmount {
-	__u32	devid;
-};
-
-struct args_ready {
-	__u32	token;
-};
-
-struct args_fail {
-	__u32	token;
-	__s32	status;
-};
-
-struct args_setpipefd {
-	__s32	pipefd;
-};
-
-struct args_timeout {
-	__u64	timeout;
-};
-
-struct args_requester {
-	__u32	uid;
-	__u32	gid;
-};
-
-struct args_expire {
-	__u32	how;
-};
-
-struct args_askumount {
-	__u32	may_umount;
-};
-
-struct args_ismountpoint {
-	union {
-		struct args_in {
-			__u32	type;
-		} in;
-		struct args_out {
-			__u32	devid;
-			__u32	magic;
-		} out;
-	};
-};
-
-/*
- * All the ioctls use this structure.
- * When sending a path size must account for the total length
- * of the chunk of memory otherwise is is the size of the
- * structure.
- */
-
-struct autofs_dev_ioctl {
-	__u32 ver_major;
-	__u32 ver_minor;
-	__u32 size;		/* total size of data passed in
-				 * including this struct */
-	__s32 ioctlfd;		/* automount command fd */
-
-	/* Command parameters */
-
-	union {
-		struct args_protover		protover;
-		struct args_protosubver		protosubver;
-		struct args_openmount		openmount;
-		struct args_ready		ready;
-		struct args_fail		fail;
-		struct args_setpipefd		setpipefd;
-		struct args_timeout		timeout;
-		struct args_requester		requester;
-		struct args_expire		expire;
-		struct args_askumount		askumount;
-		struct args_ismountpoint	ismountpoint;
-	};
-
-	char path[0];
-};
-
-static inline void init_autofs_dev_ioctl(struct autofs_dev_ioctl *in)
-{
-	memset(in, 0, sizeof(struct autofs_dev_ioctl));
-	in->ver_major = AUTOFS_DEV_IOCTL_VERSION_MAJOR;
-	in->ver_minor = AUTOFS_DEV_IOCTL_VERSION_MINOR;
-	in->size = sizeof(struct autofs_dev_ioctl);
-	in->ioctlfd = -1;
-}
-
-/*
- * If you change this make sure you make the corresponding change
- * to autofs-dev-ioctl.c:lookup_ioctl()
- */
-enum {
-	/* Get various version info */
-	AUTOFS_DEV_IOCTL_VERSION_CMD = 0x71,
-	AUTOFS_DEV_IOCTL_PROTOVER_CMD,
-	AUTOFS_DEV_IOCTL_PROTOSUBVER_CMD,
-
-	/* Open mount ioctl fd */
-	AUTOFS_DEV_IOCTL_OPENMOUNT_CMD,
-
-	/* Close mount ioctl fd */
-	AUTOFS_DEV_IOCTL_CLOSEMOUNT_CMD,
-
-	/* Mount/expire status returns */
-	AUTOFS_DEV_IOCTL_READY_CMD,
-	AUTOFS_DEV_IOCTL_FAIL_CMD,
-
-	/* Activate/deactivate autofs mount */
-	AUTOFS_DEV_IOCTL_SETPIPEFD_CMD,
-	AUTOFS_DEV_IOCTL_CATATONIC_CMD,
-
-	/* Expiry timeout */
-	AUTOFS_DEV_IOCTL_TIMEOUT_CMD,
-
-	/* Get mount last requesting uid and gid */
-	AUTOFS_DEV_IOCTL_REQUESTER_CMD,
-
-	/* Check for eligible expire candidates */
-	AUTOFS_DEV_IOCTL_EXPIRE_CMD,
-
-	/* Request busy status */
-	AUTOFS_DEV_IOCTL_ASKUMOUNT_CMD,
-
-	/* Check if path is a mountpoint */
-	AUTOFS_DEV_IOCTL_ISMOUNTPOINT_CMD,
-};
-
-#define AUTOFS_IOCTL 0x93
-
-#define AUTOFS_DEV_IOCTL_VERSION \
-	_IOWR(AUTOFS_IOCTL, \
-	      AUTOFS_DEV_IOCTL_VERSION_CMD, struct autofs_dev_ioctl)
-
-#define AUTOFS_DEV_IOCTL_PROTOVER \
-	_IOWR(AUTOFS_IOCTL, \
-	      AUTOFS_DEV_IOCTL_PROTOVER_CMD, struct autofs_dev_ioctl)
-
-#define AUTOFS_DEV_IOCTL_PROTOSUBVER \
-	_IOWR(AUTOFS_IOCTL, \
-	      AUTOFS_DEV_IOCTL_PROTOSUBVER_CMD, struct autofs_dev_ioctl)
-
-#define AUTOFS_DEV_IOCTL_OPENMOUNT \
-	_IOWR(AUTOFS_IOCTL, \
-	      AUTOFS_DEV_IOCTL_OPENMOUNT_CMD, struct autofs_dev_ioctl)
-
-#define AUTOFS_DEV_IOCTL_CLOSEMOUNT \
-	_IOWR(AUTOFS_IOCTL, \
-	      AUTOFS_DEV_IOCTL_CLOSEMOUNT_CMD, struct autofs_dev_ioctl)
-
-#define AUTOFS_DEV_IOCTL_READY \
-	_IOWR(AUTOFS_IOCTL, \
-	      AUTOFS_DEV_IOCTL_READY_CMD, struct autofs_dev_ioctl)
-
-#define AUTOFS_DEV_IOCTL_FAIL \
-	_IOWR(AUTOFS_IOCTL, \
-	      AUTOFS_DEV_IOCTL_FAIL_CMD, struct autofs_dev_ioctl)
-
-#define AUTOFS_DEV_IOCTL_SETPIPEFD \
-	_IOWR(AUTOFS_IOCTL, \
-	      AUTOFS_DEV_IOCTL_SETPIPEFD_CMD, struct autofs_dev_ioctl)
-
-#define AUTOFS_DEV_IOCTL_CATATONIC \
-	_IOWR(AUTOFS_IOCTL, \
-	      AUTOFS_DEV_IOCTL_CATATONIC_CMD, struct autofs_dev_ioctl)
-
-#define AUTOFS_DEV_IOCTL_TIMEOUT \
-	_IOWR(AUTOFS_IOCTL, \
-	      AUTOFS_DEV_IOCTL_TIMEOUT_CMD, struct autofs_dev_ioctl)
-
-#define AUTOFS_DEV_IOCTL_REQUESTER \
-	_IOWR(AUTOFS_IOCTL, \
-	      AUTOFS_DEV_IOCTL_REQUESTER_CMD, struct autofs_dev_ioctl)
-
-#define AUTOFS_DEV_IOCTL_EXPIRE \
-	_IOWR(AUTOFS_IOCTL, \
-	      AUTOFS_DEV_IOCTL_EXPIRE_CMD, struct autofs_dev_ioctl)
-
-#define AUTOFS_DEV_IOCTL_ASKUMOUNT \
-	_IOWR(AUTOFS_IOCTL, \
-	      AUTOFS_DEV_IOCTL_ASKUMOUNT_CMD, struct autofs_dev_ioctl)
-
-#define AUTOFS_DEV_IOCTL_ISMOUNTPOINT \
-	_IOWR(AUTOFS_IOCTL, \
-	      AUTOFS_DEV_IOCTL_ISMOUNTPOINT_CMD, struct autofs_dev_ioctl)
-
+#include <uapi/linux/auto_dev-ioctl.h>
 #endif	/* _LINUX_AUTO_DEV_IOCTL_H */
diff --git a/include/linux/auto_fs.h b/include/linux/auto_fs.h
index b4066bb89083..b8f814c95cf5 100644
--- a/include/linux/auto_fs.h
+++ b/include/linux/auto_fs.h
@@ -10,7 +10,6 @@
 #define _LINUX_AUTO_FS_H
 
 #include <linux/fs.h>
-#include <linux/limits.h>
 #include <linux/ioctl.h>
 #include <uapi/linux/auto_fs.h>
 #endif /* _LINUX_AUTO_FS_H */
diff --git a/include/linux/ctype.h b/include/linux/ctype.h
index 653589e3e30e..f13e4ff6835a 100644
--- a/include/linux/ctype.h
+++ b/include/linux/ctype.h
@@ -22,7 +22,10 @@ extern const unsigned char _ctype[];
 #define isalnum(c)	((__ismask(c)&(_U|_L|_D)) != 0)
 #define isalpha(c)	((__ismask(c)&(_U|_L)) != 0)
 #define iscntrl(c)	((__ismask(c)&(_C)) != 0)
-#define isdigit(c)	((__ismask(c)&(_D)) != 0)
+static inline int isdigit(int c)
+{
+	return '0' <= c && c <= '9';
+}
 #define isgraph(c)	((__ismask(c)&(_P|_U|_L|_D)) != 0)
 #define islower(c)	((__ismask(c)&(_L)) != 0)
 #define isprint(c)	((__ismask(c)&(_P|_U|_L|_D|_SP)) != 0)
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index 0f90eb5e3c6b..08528afdf58b 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -56,6 +56,11 @@
  * that gives better TLB efficiency.
  */
 #define DMA_ATTR_ALLOC_SINGLE_PAGES	(1UL << 7)
+/*
+ * DMA_ATTR_NO_WARN: This tells the DMA-mapping subsystem to suppress
+ * allocation failure reports (similarly to __GFP_NOWARN).
+ */
+#define DMA_ATTR_NO_WARN	(1UL << 8)
 
 /*
  * A dma_addr_t can hold any valid DMA or bus address for the platform.
diff --git a/include/linux/export.h b/include/linux/export.h
index c565f87f005e..d7df4922da1d 100644
--- a/include/linux/export.h
+++ b/include/linux/export.h
@@ -78,7 +78,6 @@ extern struct module __this_module;
 
 #elif defined(CONFIG_TRIM_UNUSED_KSYMS)
 
-#include <linux/kconfig.h>
 #include <generated/autoksyms.h>
 
 #define __EXPORT_SYMBOL(sym, sec)				\
diff --git a/include/linux/fs.h b/include/linux/fs.h
index c145219286a8..bc65d5918140 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -440,8 +440,9 @@ struct address_space {
 	unsigned long		nrexceptional;
 	pgoff_t			writeback_index;/* writeback starts here */
 	const struct address_space_operations *a_ops;	/* methods */
-	unsigned long		flags;		/* error bits/gfp mask */
+	unsigned long		flags;		/* error bits */
 	spinlock_t		private_lock;	/* for use by the address_space */
+	gfp_t			gfp_mask;	/* implicit gfp mask for allocations */
 	struct list_head	private_list;	/* ditto */
 	void			*private_data;	/* ditto */
 } __attribute__((aligned(sizeof(long))));
diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h
index 1f0be7213e6d..24e2cc56beb1 100644
--- a/include/linux/gpio/driver.h
+++ b/include/linux/gpio/driver.h
@@ -8,7 +8,6 @@
 #include <linux/irqdomain.h>
 #include <linux/lockdep.h>
 #include <linux/pinctrl/pinctrl.h>
-#include <linux/kconfig.h>
 
 struct gpio_desc;
 struct of_phandle_args;
diff --git a/include/linux/kexec.h b/include/linux/kexec.h
index d7437777baaa..406c33dcae13 100644
--- a/include/linux/kexec.h
+++ b/include/linux/kexec.h
@@ -259,6 +259,12 @@ phys_addr_t paddr_vmcoreinfo_note(void);
 	vmcoreinfo_append_str("NUMBER(%s)=%ld\n", #name, (long)name)
 #define VMCOREINFO_CONFIG(name) \
 	vmcoreinfo_append_str("CONFIG_%s=y\n", #name)
+#define VMCOREINFO_PAGE_OFFSET(value) \
+	vmcoreinfo_append_str("PAGE_OFFSET=%lx\n", (unsigned long)value)
+#define VMCOREINFO_VMALLOC_START(value) \
+	vmcoreinfo_append_str("VMALLOC_START=%lx\n", (unsigned long)value)
+#define VMCOREINFO_VMEMMAP_START(value) \
+	vmcoreinfo_append_str("VMEMMAP_START=%lx\n", (unsigned long)value)
 
 extern struct kimage *kexec_image;
 extern struct kimage *kexec_crash_image;
diff --git a/include/linux/kmemleak.h b/include/linux/kmemleak.h
index 4894c6888bc6..1c2a32829620 100644
--- a/include/linux/kmemleak.h
+++ b/include/linux/kmemleak.h
@@ -38,6 +38,11 @@ extern void kmemleak_not_leak(const void *ptr) __ref;
 extern void kmemleak_ignore(const void *ptr) __ref;
 extern void kmemleak_scan_area(const void *ptr, size_t size, gfp_t gfp) __ref;
 extern void kmemleak_no_scan(const void *ptr) __ref;
+extern void kmemleak_alloc_phys(phys_addr_t phys, size_t size, int min_count,
+				gfp_t gfp) __ref;
+extern void kmemleak_free_part_phys(phys_addr_t phys, size_t size) __ref;
+extern void kmemleak_not_leak_phys(phys_addr_t phys) __ref;
+extern void kmemleak_ignore_phys(phys_addr_t phys) __ref;
 
 static inline void kmemleak_alloc_recursive(const void *ptr, size_t size,
 					    int min_count, unsigned long flags,
@@ -106,6 +111,19 @@ static inline void kmemleak_erase(void **ptr)
 static inline void kmemleak_no_scan(const void *ptr)
 {
 }
+static inline void kmemleak_alloc_phys(phys_addr_t phys, size_t size,
+				       int min_count, gfp_t gfp)
+{
+}
+static inline void kmemleak_free_part_phys(phys_addr_t phys, size_t size)
+{
+}
+static inline void kmemleak_not_leak_phys(phys_addr_t phys)
+{
+}
+static inline void kmemleak_ignore_phys(phys_addr_t phys)
+{
+}
 
 #endif	/* CONFIG_DEBUG_KMEMLEAK */
 
diff --git a/include/linux/kthread.h b/include/linux/kthread.h
index e691b6a23f72..a6e82a69c363 100644
--- a/include/linux/kthread.h
+++ b/include/linux/kthread.h
@@ -10,6 +10,17 @@ struct task_struct *kthread_create_on_node(int (*threadfn)(void *data),
 					   int node,
 					   const char namefmt[], ...);
 
+/**
+ * kthread_create - create a kthread on the current node
+ * @threadfn: the function to run in the thread
+ * @data: data pointer for @threadfn()
+ * @namefmt: printf-style format string for the thread name
+ * @...: arguments for @namefmt.
+ *
+ * This macro will create a kthread on the current node, leaving it in
+ * the stopped state.  This is just a helper for kthread_create_on_node();
+ * see the documentation there for more details.
+ */
 #define kthread_create(threadfn, data, namefmt, arg...) \
 	kthread_create_on_node(threadfn, data, NUMA_NO_NODE, namefmt, ##arg)
 
@@ -44,7 +55,7 @@ bool kthread_should_stop(void);
 bool kthread_should_park(void);
 bool kthread_freezable_should_stop(bool *was_frozen);
 void *kthread_data(struct task_struct *k);
-void *probe_kthread_data(struct task_struct *k);
+void *kthread_probe_data(struct task_struct *k);
 int kthread_park(struct task_struct *k);
 void kthread_unpark(struct task_struct *k);
 void kthread_parkme(void);
@@ -57,16 +68,23 @@ extern int tsk_fork_get_node(struct task_struct *tsk);
  * Simple work processor based on kthread.
  *
  * This provides easier way to make use of kthreads.  A kthread_work
- * can be queued and flushed using queue/flush_kthread_work()
+ * can be queued and flushed using queue/kthread_flush_work()
  * respectively.  Queued kthread_works are processed by a kthread
  * running kthread_worker_fn().
  */
 struct kthread_work;
 typedef void (*kthread_work_func_t)(struct kthread_work *work);
+void kthread_delayed_work_timer_fn(unsigned long __data);
+
+enum {
+	KTW_FREEZABLE		= 1 << 0,	/* freeze during suspend */
+};
 
 struct kthread_worker {
+	unsigned int		flags;
 	spinlock_t		lock;
 	struct list_head	work_list;
+	struct list_head	delayed_work_list;
 	struct task_struct	*task;
 	struct kthread_work	*current_work;
 };
@@ -75,11 +93,19 @@ struct kthread_work {
 	struct list_head	node;
 	kthread_work_func_t	func;
 	struct kthread_worker	*worker;
+	/* Number of canceling calls that are running at the moment. */
+	int			canceling;
+};
+
+struct kthread_delayed_work {
+	struct kthread_work work;
+	struct timer_list timer;
 };
 
 #define KTHREAD_WORKER_INIT(worker)	{				\
 	.lock = __SPIN_LOCK_UNLOCKED((worker).lock),			\
 	.work_list = LIST_HEAD_INIT((worker).work_list),		\
+	.delayed_work_list = LIST_HEAD_INIT((worker).delayed_work_list),\
 	}
 
 #define KTHREAD_WORK_INIT(work, fn)	{				\
@@ -87,46 +113,88 @@ struct kthread_work {
 	.func = (fn),							\
 	}
 
+#define KTHREAD_DELAYED_WORK_INIT(dwork, fn) {				\
+	.work = KTHREAD_WORK_INIT((dwork).work, (fn)),			\
+	.timer = __TIMER_INITIALIZER(kthread_delayed_work_timer_fn,	\
+				     0, (unsigned long)&(dwork),	\
+				     TIMER_IRQSAFE),			\
+	}
+
 #define DEFINE_KTHREAD_WORKER(worker)					\
 	struct kthread_worker worker = KTHREAD_WORKER_INIT(worker)
 
 #define DEFINE_KTHREAD_WORK(work, fn)					\
 	struct kthread_work work = KTHREAD_WORK_INIT(work, fn)
 
+#define DEFINE_KTHREAD_DELAYED_WORK(dwork, fn)				\
+	struct kthread_delayed_work dwork =				\
+		KTHREAD_DELAYED_WORK_INIT(dwork, fn)
+
 /*
  * kthread_worker.lock needs its own lockdep class key when defined on
  * stack with lockdep enabled.  Use the following macros in such cases.
  */
 #ifdef CONFIG_LOCKDEP
 # define KTHREAD_WORKER_INIT_ONSTACK(worker)				\
-	({ init_kthread_worker(&worker); worker; })
+	({ kthread_init_worker(&worker); worker; })
 # define DEFINE_KTHREAD_WORKER_ONSTACK(worker)				\
 	struct kthread_worker worker = KTHREAD_WORKER_INIT_ONSTACK(worker)
 #else
 # define DEFINE_KTHREAD_WORKER_ONSTACK(worker) DEFINE_KTHREAD_WORKER(worker)
 #endif
 
-extern void __init_kthread_worker(struct kthread_worker *worker,
+extern void __kthread_init_worker(struct kthread_worker *worker,
 			const char *name, struct lock_class_key *key);
 
-#define init_kthread_worker(worker)					\
+#define kthread_init_worker(worker)					\
 	do {								\
 		static struct lock_class_key __key;			\
-		__init_kthread_worker((worker), "("#worker")->lock", &__key); \
+		__kthread_init_worker((worker), "("#worker")->lock", &__key); \
 	} while (0)
 
-#define init_kthread_work(work, fn)					\
+#define kthread_init_work(work, fn)					\
 	do {								\
 		memset((work), 0, sizeof(struct kthread_work));		\
 		INIT_LIST_HEAD(&(work)->node);				\
 		(work)->func = (fn);					\
 	} while (0)
 
+#define kthread_init_delayed_work(dwork, fn)				\
+	do {								\
+		kthread_init_work(&(dwork)->work, (fn));		\
+		__setup_timer(&(dwork)->timer,				\
+			      kthread_delayed_work_timer_fn,		\
+			      (unsigned long)(dwork),			\
+			      TIMER_IRQSAFE);				\
+	} while (0)
+
 int kthread_worker_fn(void *worker_ptr);
 
-bool queue_kthread_work(struct kthread_worker *worker,
+__printf(2, 3)
+struct kthread_worker *
+kthread_create_worker(unsigned int flags, const char namefmt[], ...);
+
+struct kthread_worker *
+kthread_create_worker_on_cpu(int cpu, unsigned int flags,
+			     const char namefmt[], ...);
+
+bool kthread_queue_work(struct kthread_worker *worker,
 			struct kthread_work *work);
-void flush_kthread_work(struct kthread_work *work);
-void flush_kthread_worker(struct kthread_worker *worker);
+
+bool kthread_queue_delayed_work(struct kthread_worker *worker,
+				struct kthread_delayed_work *dwork,
+				unsigned long delay);
+
+bool kthread_mod_delayed_work(struct kthread_worker *worker,
+			      struct kthread_delayed_work *dwork,
+			      unsigned long delay);
+
+void kthread_flush_work(struct kthread_work *work);
+void kthread_flush_worker(struct kthread_worker *worker);
+
+bool kthread_cancel_work_sync(struct kthread_work *work);
+bool kthread_cancel_delayed_work_sync(struct kthread_delayed_work *work);
+
+void kthread_destroy_worker(struct kthread_worker *worker);
 
 #endif /* _LINUX_KTHREAD_H */
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index 747f401cc312..dd15d39e1985 100644
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -16,17 +16,16 @@
 #include <linux/hugetlb_inline.h>
 
 /*
- * Bits in mapping->flags.  The lower __GFP_BITS_SHIFT bits are the page
- * allocation mode flags.
+ * Bits in mapping->flags.
  */
 enum mapping_flags {
-	AS_EIO		= __GFP_BITS_SHIFT + 0,	/* IO error on async write */
-	AS_ENOSPC	= __GFP_BITS_SHIFT + 1,	/* ENOSPC on async write */
-	AS_MM_ALL_LOCKS	= __GFP_BITS_SHIFT + 2,	/* under mm_take_all_locks() */
-	AS_UNEVICTABLE	= __GFP_BITS_SHIFT + 3,	/* e.g., ramdisk, SHM_LOCK */
-	AS_EXITING	= __GFP_BITS_SHIFT + 4, /* final truncate in progress */
+	AS_EIO		= 0,	/* IO error on async write */
+	AS_ENOSPC	= 1,	/* ENOSPC on async write */
+	AS_MM_ALL_LOCKS	= 2,	/* under mm_take_all_locks() */
+	AS_UNEVICTABLE	= 3,	/* e.g., ramdisk, SHM_LOCK */
+	AS_EXITING	= 4, 	/* final truncate in progress */
 	/* writeback related tags are not used */
-	AS_NO_WRITEBACK_TAGS = __GFP_BITS_SHIFT + 5,
+	AS_NO_WRITEBACK_TAGS = 5,
 };
 
 static inline void mapping_set_error(struct address_space *mapping, int error)
@@ -78,7 +77,7 @@ static inline int mapping_use_writeback_tags(struct address_space *mapping)
 
 static inline gfp_t mapping_gfp_mask(struct address_space * mapping)
 {
-	return (__force gfp_t)mapping->flags & __GFP_BITS_MASK;
+	return mapping->gfp_mask;
 }
 
 /* Restricts the given gfp_mask to what the mapping allows. */
@@ -94,8 +93,7 @@ static inline gfp_t mapping_gfp_constraint(struct address_space *mapping,
  */
 static inline void mapping_set_gfp_mask(struct address_space *m, gfp_t mask)
 {
-	m->flags = (m->flags & ~(__force unsigned long)__GFP_BITS_MASK) |
-				(__force unsigned long)mask;
+	m->gfp_mask = mask;
 }
 
 void release_pages(struct page **pages, int nr, bool cold);
diff --git a/include/linux/radix-tree.h b/include/linux/radix-tree.h
index 52b97db93830..af3581b8a451 100644
--- a/include/linux/radix-tree.h
+++ b/include/linux/radix-tree.h
@@ -461,6 +461,14 @@ static inline struct radix_tree_node *entry_to_node(void *ptr)
  *
  * This function updates @iter->index in the case of a successful lookup.
  * For tagged lookup it also eats @iter->tags.
+ *
+ * There are several cases where 'slot' can be passed in as NULL to this
+ * function.  These cases result from the use of radix_tree_iter_next() or
+ * radix_tree_iter_retry().  In these cases we don't end up dereferencing
+ * 'slot' because either:
+ * a) we are doing tagged iteration and iter->tags has been set to 0, or
+ * b) we are doing non-tagged iteration, and iter->index and iter->next_index
+ *    have been set up so that radix_tree_chunk_size() returns 1 or 0.
  */
 static __always_inline void **
 radix_tree_next_slot(void **slot, struct radix_tree_iter *iter, unsigned flags)
diff --git a/include/linux/random.h b/include/linux/random.h
index 3d6e9815cd85..f7bb7a355cf7 100644
--- a/include/linux/random.h
+++ b/include/linux/random.h
@@ -34,7 +34,7 @@ extern const struct file_operations random_fops, urandom_fops;
 
 unsigned int get_random_int(void);
 unsigned long get_random_long(void);
-unsigned long randomize_range(unsigned long start, unsigned long end, unsigned long len);
+unsigned long randomize_page(unsigned long start, unsigned long range);
 
 u32 prandom_u32(void);
 void prandom_bytes(void *buf, size_t nbytes);
diff --git a/include/linux/relay.h b/include/linux/relay.h
index ecbb34a382b8..68c1448e56bb 100644
--- a/include/linux/relay.h
+++ b/include/linux/relay.h
@@ -15,6 +15,7 @@
 #include <linux/timer.h>
 #include <linux/wait.h>
 #include <linux/list.h>
+#include <linux/irq_work.h>
 #include <linux/bug.h>
 #include <linux/fs.h>
 #include <linux/poll.h>
@@ -38,7 +39,7 @@ struct rchan_buf
 	size_t subbufs_consumed;	/* count of sub-buffers consumed */
 	struct rchan *chan;		/* associated channel */
 	wait_queue_head_t read_wait;	/* reader wait queue */
-	struct timer_list timer; 	/* reader wake-up timer */
+	struct irq_work wakeup_work;	/* reader wakeup */
 	struct dentry *dentry;		/* channel file dentry */
 	struct kref kref;		/* channel buffer refcount */
 	struct page **page_array;	/* array of current buffer pages */
diff --git a/include/linux/sem.h b/include/linux/sem.h
index 976ce3a19f1b..d0efd6e6c20a 100644
--- a/include/linux/sem.h
+++ b/include/linux/sem.h
@@ -21,6 +21,7 @@ struct sem_array {
 	struct list_head	list_id;	/* undo requests on this array */
 	int			sem_nsems;	/* no. of semaphores in array */
 	int			complex_count;	/* pending complex operations */
+	bool			complex_mode;	/* no parallel simple ops */
 };
 
 #ifdef CONFIG_SYSVIPC
diff --git a/include/uapi/linux/auto_dev-ioctl.h b/include/uapi/linux/auto_dev-ioctl.h
new file mode 100644
index 000000000000..021ed331dd71
--- /dev/null
+++ b/include/uapi/linux/auto_dev-ioctl.h
@@ -0,0 +1,221 @@
+/*
+ * Copyright 2008 Red Hat, Inc. All rights reserved.
+ * Copyright 2008 Ian Kent <raven@themaw.net>
+ *
+ * This file is part of the Linux kernel and is made available under
+ * the terms of the GNU General Public License, version 2, or at your
+ * option, any later version, incorporated herein by reference.
+ */
+
+#ifndef _UAPI_LINUX_AUTO_DEV_IOCTL_H
+#define _UAPI_LINUX_AUTO_DEV_IOCTL_H
+
+#include <linux/auto_fs.h>
+#include <linux/string.h>
+
+#define AUTOFS_DEVICE_NAME		"autofs"
+
+#define AUTOFS_DEV_IOCTL_VERSION_MAJOR	1
+#define AUTOFS_DEV_IOCTL_VERSION_MINOR	0
+
+#define AUTOFS_DEV_IOCTL_SIZE		sizeof(struct autofs_dev_ioctl)
+
+/*
+ * An ioctl interface for autofs mount point control.
+ */
+
+struct args_protover {
+	__u32	version;
+};
+
+struct args_protosubver {
+	__u32	sub_version;
+};
+
+struct args_openmount {
+	__u32	devid;
+};
+
+struct args_ready {
+	__u32	token;
+};
+
+struct args_fail {
+	__u32	token;
+	__s32	status;
+};
+
+struct args_setpipefd {
+	__s32	pipefd;
+};
+
+struct args_timeout {
+	__u64	timeout;
+};
+
+struct args_requester {
+	__u32	uid;
+	__u32	gid;
+};
+
+struct args_expire {
+	__u32	how;
+};
+
+struct args_askumount {
+	__u32	may_umount;
+};
+
+struct args_ismountpoint {
+	union {
+		struct args_in {
+			__u32	type;
+		} in;
+		struct args_out {
+			__u32	devid;
+			__u32	magic;
+		} out;
+	};
+};
+
+/*
+ * All the ioctls use this structure.
+ * When sending a path size must account for the total length
+ * of the chunk of memory otherwise is is the size of the
+ * structure.
+ */
+
+struct autofs_dev_ioctl {
+	__u32 ver_major;
+	__u32 ver_minor;
+	__u32 size;		/* total size of data passed in
+				 * including this struct */
+	__s32 ioctlfd;		/* automount command fd */
+
+	/* Command parameters */
+
+	union {
+		struct args_protover		protover;
+		struct args_protosubver		protosubver;
+		struct args_openmount		openmount;
+		struct args_ready		ready;
+		struct args_fail		fail;
+		struct args_setpipefd		setpipefd;
+		struct args_timeout		timeout;
+		struct args_requester		requester;
+		struct args_expire		expire;
+		struct args_askumount		askumount;
+		struct args_ismountpoint	ismountpoint;
+	};
+
+	char path[0];
+};
+
+static inline void init_autofs_dev_ioctl(struct autofs_dev_ioctl *in)
+{
+	memset(in, 0, sizeof(struct autofs_dev_ioctl));
+	in->ver_major = AUTOFS_DEV_IOCTL_VERSION_MAJOR;
+	in->ver_minor = AUTOFS_DEV_IOCTL_VERSION_MINOR;
+	in->size = sizeof(struct autofs_dev_ioctl);
+	in->ioctlfd = -1;
+}
+
+/*
+ * If you change this make sure you make the corresponding change
+ * to autofs-dev-ioctl.c:lookup_ioctl()
+ */
+enum {
+	/* Get various version info */
+	AUTOFS_DEV_IOCTL_VERSION_CMD = 0x71,
+	AUTOFS_DEV_IOCTL_PROTOVER_CMD,
+	AUTOFS_DEV_IOCTL_PROTOSUBVER_CMD,
+
+	/* Open mount ioctl fd */
+	AUTOFS_DEV_IOCTL_OPENMOUNT_CMD,
+
+	/* Close mount ioctl fd */
+	AUTOFS_DEV_IOCTL_CLOSEMOUNT_CMD,
+
+	/* Mount/expire status returns */
+	AUTOFS_DEV_IOCTL_READY_CMD,
+	AUTOFS_DEV_IOCTL_FAIL_CMD,
+
+	/* Activate/deactivate autofs mount */
+	AUTOFS_DEV_IOCTL_SETPIPEFD_CMD,
+	AUTOFS_DEV_IOCTL_CATATONIC_CMD,
+
+	/* Expiry timeout */
+	AUTOFS_DEV_IOCTL_TIMEOUT_CMD,
+
+	/* Get mount last requesting uid and gid */
+	AUTOFS_DEV_IOCTL_REQUESTER_CMD,
+
+	/* Check for eligible expire candidates */
+	AUTOFS_DEV_IOCTL_EXPIRE_CMD,
+
+	/* Request busy status */
+	AUTOFS_DEV_IOCTL_ASKUMOUNT_CMD,
+
+	/* Check if path is a mountpoint */
+	AUTOFS_DEV_IOCTL_ISMOUNTPOINT_CMD,
+};
+
+#define AUTOFS_IOCTL 0x93
+
+#define AUTOFS_DEV_IOCTL_VERSION \
+	_IOWR(AUTOFS_IOCTL, \
+	      AUTOFS_DEV_IOCTL_VERSION_CMD, struct autofs_dev_ioctl)
+
+#define AUTOFS_DEV_IOCTL_PROTOVER \
+	_IOWR(AUTOFS_IOCTL, \
+	      AUTOFS_DEV_IOCTL_PROTOVER_CMD, struct autofs_dev_ioctl)
+
+#define AUTOFS_DEV_IOCTL_PROTOSUBVER \
+	_IOWR(AUTOFS_IOCTL, \
+	      AUTOFS_DEV_IOCTL_PROTOSUBVER_CMD, struct autofs_dev_ioctl)
+
+#define AUTOFS_DEV_IOCTL_OPENMOUNT \
+	_IOWR(AUTOFS_IOCTL, \
+	      AUTOFS_DEV_IOCTL_OPENMOUNT_CMD, struct autofs_dev_ioctl)
+
+#define AUTOFS_DEV_IOCTL_CLOSEMOUNT \
+	_IOWR(AUTOFS_IOCTL, \
+	      AUTOFS_DEV_IOCTL_CLOSEMOUNT_CMD, struct autofs_dev_ioctl)
+
+#define AUTOFS_DEV_IOCTL_READY \
+	_IOWR(AUTOFS_IOCTL, \
+	      AUTOFS_DEV_IOCTL_READY_CMD, struct autofs_dev_ioctl)
+
+#define AUTOFS_DEV_IOCTL_FAIL \
+	_IOWR(AUTOFS_IOCTL, \
+	      AUTOFS_DEV_IOCTL_FAIL_CMD, struct autofs_dev_ioctl)
+
+#define AUTOFS_DEV_IOCTL_SETPIPEFD \
+	_IOWR(AUTOFS_IOCTL, \
+	      AUTOFS_DEV_IOCTL_SETPIPEFD_CMD, struct autofs_dev_ioctl)
+
+#define AUTOFS_DEV_IOCTL_CATATONIC \
+	_IOWR(AUTOFS_IOCTL, \
+	      AUTOFS_DEV_IOCTL_CATATONIC_CMD, struct autofs_dev_ioctl)
+
+#define AUTOFS_DEV_IOCTL_TIMEOUT \
+	_IOWR(AUTOFS_IOCTL, \
+	      AUTOFS_DEV_IOCTL_TIMEOUT_CMD, struct autofs_dev_ioctl)
+
+#define AUTOFS_DEV_IOCTL_REQUESTER \
+	_IOWR(AUTOFS_IOCTL, \
+	      AUTOFS_DEV_IOCTL_REQUESTER_CMD, struct autofs_dev_ioctl)
+
+#define AUTOFS_DEV_IOCTL_EXPIRE \
+	_IOWR(AUTOFS_IOCTL, \
+	      AUTOFS_DEV_IOCTL_EXPIRE_CMD, struct autofs_dev_ioctl)
+
+#define AUTOFS_DEV_IOCTL_ASKUMOUNT \
+	_IOWR(AUTOFS_IOCTL, \
+	      AUTOFS_DEV_IOCTL_ASKUMOUNT_CMD, struct autofs_dev_ioctl)
+
+#define AUTOFS_DEV_IOCTL_ISMOUNTPOINT \
+	_IOWR(AUTOFS_IOCTL, \
+	      AUTOFS_DEV_IOCTL_ISMOUNTPOINT_CMD, struct autofs_dev_ioctl)
+
+#endif	/* _UAPI_LINUX_AUTO_DEV_IOCTL_H */
diff --git a/include/uapi/linux/auto_fs.h b/include/uapi/linux/auto_fs.h
index 9175a1b4dc69..1bfc3ed8b284 100644
--- a/include/uapi/linux/auto_fs.h
+++ b/include/uapi/linux/auto_fs.h
@@ -12,6 +12,7 @@
 #define _UAPI_LINUX_AUTO_FS_H
 
 #include <linux/types.h>
+#include <linux/limits.h>
 #ifndef __KERNEL__
 #include <sys/ioctl.h>
 #endif /* __KERNEL__ */