Merge branch 'akpm' (Andrew's incoming - part two)

Says Andrew:

 "60 patches.  That's good enough for -rc1 I guess.  I have quite a lot
  of detritus to be rechecked, work through maintainers, etc.

 - most of the remains of MM
 - rtc
 - various misc
 - cgroups
 - memcg
 - cpusets
 - procfs
 - ipc
 - rapidio
 - sysctl
 - pps
 - w1
 - drivers/misc
 - aio"

* akpm: (60 commits)
  memcg: replace ss->id_lock with a rwlock
  aio: allocate kiocbs in batches
  drivers/misc/vmw_balloon.c: fix typo in code comment
  drivers/misc/vmw_balloon.c: determine page allocation flag can_sleep outside loop
  w1: disable irqs in critical section
  drivers/w1/w1_int.c: multiple masters used same init_name
  drivers/power/ds2780_battery.c: fix deadlock upon insertion and removal
  drivers/power/ds2780_battery.c: add a nolock function to w1 interface
  drivers/power/ds2780_battery.c: create central point for calling w1 interface
  w1: ds2760 and ds2780, use ida for id and ida_simple_get() to get it
  pps gpio client: add missing dependency
  pps: new client driver using GPIO
  pps: default echo function
  include/linux/dma-mapping.h: add dma_zalloc_coherent()
  sysctl: make CONFIG_SYSCTL_SYSCALL default to n
  sysctl: add support for poll()
  RapidIO: documentation update
  drivers/net/rionet.c: fix ethernet address macros for LE platforms
  RapidIO: fix potential null deref in rio_setup_device()
  RapidIO: add mport driver for Tsi721 bridge
  ...

12 files changed, 168 insertions, 107 deletions

diff --git a/include/linux/aio.h b/include/linux/aio.h
index 2dcb72bff4b6..2314ad8b3c9c 100644
--- a/include/linux/aio.h
+++ b/include/linux/aio.h
@@ -117,6 +117,7 @@ struct kiocb {
 
 	struct list_head	ki_list;	/* the aio core uses this
 						 * for cancellation */
+	struct list_head	ki_batch;	/* batch allocation */
 
 	/*
 	 * If the aio_resfd field of the userspace iocb is not zero,
diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index da7e4bc34e8c..1b7f9d525013 100644
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -516,7 +516,7 @@ struct cgroup_subsys {
 	struct list_head sibling;
 	/* used when use_id == true */
 	struct idr idr;
-	spinlock_t id_lock;
+	rwlock_t id_lock;
 
 	/* should be defined only by modular subsystems */
 	struct module *module;
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index 347fdc32177a..be86ae13893f 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -1,6 +1,7 @@
 #ifndef _LINUX_DMA_MAPPING_H
 #define _LINUX_DMA_MAPPING_H
 
+#include <linux/string.h>
 #include <linux/device.h>
 #include <linux/err.h>
 #include <linux/dma-attrs.h>
@@ -117,6 +118,15 @@ static inline int dma_set_seg_boundary(struct device *dev, unsigned long mask)
 		return -EIO;
 }
 
+static inline void *dma_zalloc_coherent(struct device *dev, size_t size,
+					dma_addr_t *dma_handle, gfp_t flag)
+{
+	void *ret = dma_alloc_coherent(dev, size, dma_handle, flag);
+	if (ret)
+		memset(ret, 0, size);
+	return ret;
+}
+
 #ifdef CONFIG_HAS_DMA
 static inline int dma_get_cache_alignment(void)
 {
diff --git a/include/linux/magic.h b/include/linux/magic.h
index 1e5df2af8d84..2d4beab0d5b7 100644
--- a/include/linux/magic.h
+++ b/include/linux/magic.h
@@ -30,11 +30,11 @@
 #define ANON_INODE_FS_MAGIC	0x09041934
 #define PSTOREFS_MAGIC		0x6165676C
 
-#define MINIX_SUPER_MAGIC	0x137F		/* original minix fs */
-#define MINIX_SUPER_MAGIC2	0x138F		/* minix fs, 30 char names */
-#define MINIX2_SUPER_MAGIC	0x2468		/* minix V2 fs */
-#define MINIX2_SUPER_MAGIC2	0x2478		/* minix V2 fs, 30 char names */
-#define MINIX3_SUPER_MAGIC	0x4d5a		/* minix V3 fs */
+#define MINIX_SUPER_MAGIC	0x137F		/* minix v1 fs, 14 char names */
+#define MINIX_SUPER_MAGIC2	0x138F		/* minix v1 fs, 30 char names */
+#define MINIX2_SUPER_MAGIC	0x2468		/* minix v2 fs, 14 char names */
+#define MINIX2_SUPER_MAGIC2	0x2478		/* minix v2 fs, 30 char names */
+#define MINIX3_SUPER_MAGIC	0x4d5a		/* minix v3 fs, 60 char names */
 
 #define MSDOS_SUPER_MAGIC	0x4d44		/* MD */
 #define NCP_SUPER_MAGIC		0x564c		/* Guess, what 0x564c is :-) */
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index ac797fa03ef8..b87068a1a09e 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -78,8 +78,8 @@ extern void mem_cgroup_uncharge_end(void);
 extern void mem_cgroup_uncharge_page(struct page *page);
 extern void mem_cgroup_uncharge_cache_page(struct page *page);
 
-extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask);
-int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem);
+extern void mem_cgroup_out_of_memory(struct mem_cgroup *memcg, gfp_t gfp_mask);
+int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *memcg);
 
 extern struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page);
 extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);
@@ -88,26 +88,28 @@ extern struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm);
 static inline
 int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup)
 {
-	struct mem_cgroup *mem;
+	struct mem_cgroup *memcg;
 	rcu_read_lock();
-	mem = mem_cgroup_from_task(rcu_dereference((mm)->owner));
+	memcg = mem_cgroup_from_task(rcu_dereference((mm)->owner));
 	rcu_read_unlock();
-	return cgroup == mem;
+	return cgroup == memcg;
 }
 
-extern struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem);
+extern struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *memcg);
 
 extern int
 mem_cgroup_prepare_migration(struct page *page,
 	struct page *newpage, struct mem_cgroup **ptr, gfp_t gfp_mask);
-extern void mem_cgroup_end_migration(struct mem_cgroup *mem,
+extern void mem_cgroup_end_migration(struct mem_cgroup *memcg,
 	struct page *oldpage, struct page *newpage, bool migration_ok);
 
 /*
  * For memory reclaim.
  */
-int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg);
-int mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg);
+int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg,
+				    struct zone *zone);
+int mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg,
+				    struct zone *zone);
 int mem_cgroup_select_victim_node(struct mem_cgroup *memcg);
 unsigned long mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *memcg,
 					int nid, int zid, unsigned int lrumask);
@@ -148,7 +150,7 @@ static inline void mem_cgroup_dec_page_stat(struct page *page,
 unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
 						gfp_t gfp_mask,
 						unsigned long *total_scanned);
-u64 mem_cgroup_get_limit(struct mem_cgroup *mem);
+u64 mem_cgroup_get_limit(struct mem_cgroup *memcg);
 
 void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx);
 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
@@ -244,18 +246,20 @@ static inline struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm
 	return NULL;
 }
 
-static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem)
+static inline int mm_match_cgroup(struct mm_struct *mm,
+		struct mem_cgroup *memcg)
 {
 	return 1;
 }
 
 static inline int task_in_mem_cgroup(struct task_struct *task,
-				     const struct mem_cgroup *mem)
+				     const struct mem_cgroup *memcg)
 {
 	return 1;
 }
 
-static inline struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem)
+static inline struct cgroup_subsys_state
+		*mem_cgroup_css(struct mem_cgroup *memcg)
 {
 	return NULL;
 }
@@ -267,22 +271,22 @@ mem_cgroup_prepare_migration(struct page *page, struct page *newpage,
 	return 0;
 }
 
-static inline void mem_cgroup_end_migration(struct mem_cgroup *mem,
+static inline void mem_cgroup_end_migration(struct mem_cgroup *memcg,
 		struct page *oldpage, struct page *newpage, bool migration_ok)
 {
 }
 
-static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem)
+static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *memcg)
 {
 	return 0;
 }
 
-static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
+static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *memcg,
 						int priority)
 {
 }
 
-static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
+static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *memcg,
 						int priority)
 {
 }
@@ -293,13 +297,13 @@ static inline bool mem_cgroup_disabled(void)
 }
 
 static inline int
-mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg)
+mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg, struct zone *zone)
 {
 	return 1;
 }
 
 static inline int
-mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg)
+mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg, struct zone *zone)
 {
 	return 1;
 }
@@ -348,7 +352,7 @@ unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
 }
 
 static inline
-u64 mem_cgroup_get_limit(struct mem_cgroup *mem)
+u64 mem_cgroup_get_limit(struct mem_cgroup *memcg)
 {
 	return 0;
 }
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 3b3e3b8bb706..3dc3a8c2c485 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -356,36 +356,50 @@ static inline struct page *compound_head(struct page *page)
 	return page;
 }
 
+/*
+ * The atomic page->_mapcount, starts from -1: so that transitions
+ * both from it and to it can be tracked, using atomic_inc_and_test
+ * and atomic_add_negative(-1).
+ */
+static inline void reset_page_mapcount(struct page *page)
+{
+	atomic_set(&(page)->_mapcount, -1);
+}
+
+static inline int page_mapcount(struct page *page)
+{
+	return atomic_read(&(page)->_mapcount) + 1;
+}
+
 static inline int page_count(struct page *page)
 {
 	return atomic_read(&compound_head(page)->_count);
 }
 
+static inline void get_huge_page_tail(struct page *page)
+{
+	/*
+	 * __split_huge_page_refcount() cannot run
+	 * from under us.
+	 */
+	VM_BUG_ON(page_mapcount(page) < 0);
+	VM_BUG_ON(atomic_read(&page->_count) != 0);
+	atomic_inc(&page->_mapcount);
+}
+
+extern bool __get_page_tail(struct page *page);
+
 static inline void get_page(struct page *page)
 {
+	if (unlikely(PageTail(page)))
+		if (likely(__get_page_tail(page)))
+			return;
 	/*
 	 * Getting a normal page or the head of a compound page
-	 * requires to already have an elevated page->_count. Only if
-	 * we're getting a tail page, the elevated page->_count is
-	 * required only in the head page, so for tail pages the
-	 * bugcheck only verifies that the page->_count isn't
-	 * negative.
+	 * requires to already have an elevated page->_count.
 	 */
-	VM_BUG_ON(atomic_read(&page->_count) < !PageTail(page));
+	VM_BUG_ON(atomic_read(&page->_count) <= 0);
 	atomic_inc(&page->_count);
-	/*
-	 * Getting a tail page will elevate both the head and tail
-	 * page->_count(s).
-	 */
-	if (unlikely(PageTail(page))) {
-		/*
-		 * This is safe only because
-		 * __split_huge_page_refcount can't run under
-		 * get_page().
-		 */
-		VM_BUG_ON(atomic_read(&page->first_page->_count) <= 0);
-		atomic_inc(&page->first_page->_count);
-	}
 }
 
 static inline struct page *virt_to_head_page(const void *x)
@@ -804,21 +818,6 @@ static inline pgoff_t page_index(struct page *page)
 }
 
 /*
- * The atomic page->_mapcount, like _count, starts from -1:
- * so that transitions both from it and to it can be tracked,
- * using atomic_inc_and_test and atomic_add_negative(-1).
- */
-static inline void reset_page_mapcount(struct page *page)
-{
-	atomic_set(&(page)->_mapcount, -1);
-}
-
-static inline int page_mapcount(struct page *page)
-{
-	return atomic_read(&(page)->_mapcount) + 1;
-}
-
-/*
  * Return true if this page is mapped into pagetables.
  */
 static inline int page_mapped(struct page *page)
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 3e01a19a91e8..5b42f1b34eb7 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -62,10 +62,23 @@ struct page {
 			struct {
 
 				union {
-					atomic_t _mapcount;	/* Count of ptes mapped in mms,
-							 * to show when page is mapped
-							 * & limit reverse map searches.
-							 */
+					/*
+					 * Count of ptes mapped in
+					 * mms, to show when page is
+					 * mapped & limit reverse map
+					 * searches.
+					 *
+					 * Used also for tail pages
+					 * refcounting instead of
+					 * _count. Tail pages cannot
+					 * be mapped and keeping the
+					 * tail page _count zero at
+					 * all times guarantees
+					 * get_page_unless_zero() will
+					 * never succeed on tail
+					 * pages.
+					 */
+					atomic_t _mapcount;
 
 					struct {
 						unsigned inuse:16;
diff --git a/include/linux/pps-gpio.h b/include/linux/pps-gpio.h
new file mode 100644
index 000000000000..0035abe41b9a
--- /dev/null
+++ b/include/linux/pps-gpio.h
@@ -0,0 +1,32 @@
+/*
+ * pps-gpio.h -- PPS client for GPIOs
+ *
+ *
+ * Copyright (C) 2011 James Nuss <jamesnuss@nanometrics.ca>
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef _PPS_GPIO_H
+#define _PPS_GPIO_H
+
+struct pps_gpio_platform_data {
+	bool assert_falling_edge;
+	bool capture_clear;
+	unsigned int gpio_pin;
+	const char *gpio_label;
+};
+
+#endif
diff --git a/include/linux/rio_ids.h b/include/linux/rio_ids.h
index 0cee0152aca9..b66d13d1bdc0 100644
--- a/include/linux/rio_ids.h
+++ b/include/linux/rio_ids.h
@@ -39,5 +39,6 @@
 #define RIO_DID_IDTCPS1616		0x0379
 #define RIO_DID_IDTVPS1616		0x0377
 #define RIO_DID_IDTSPS1616		0x0378
+#define RIO_DID_TSI721			0x80ab
 
 #endif				/* LINUX_RIO_IDS_H */
diff --git a/include/linux/sem.h b/include/linux/sem.h
index 1feb2de2ee57..10d6b226afc5 100644
--- a/include/linux/sem.h
+++ b/include/linux/sem.h
@@ -83,13 +83,6 @@ struct  seminfo {
 
 struct task_struct;
 
-/* One semaphore structure for each semaphore in the system. */
-struct sem {
-	int	semval;		/* current value */
-	int	sempid;		/* pid of last operation */
-	struct list_head sem_pending; /* pending single-sop operations */
-};
-
 /* One sem_array data structure for each set of semaphores in the system. */
 struct sem_array {
 	struct kern_ipc_perm	____cacheline_aligned_in_smp
@@ -103,51 +96,21 @@ struct sem_array {
 	int			complex_count;	/* pending complex operations */
 };
 
-/* One queue for each sleeping process in the system. */
-struct sem_queue {
-	struct list_head	simple_list; /* queue of pending operations */
-	struct list_head	list;	 /* queue of pending operations */
-	struct task_struct	*sleeper; /* this process */
-	struct sem_undo		*undo;	 /* undo structure */
-	int    			pid;	 /* process id of requesting process */
-	int    			status;	 /* completion status of operation */
-	struct sembuf		*sops;	 /* array of pending operations */
-	int			nsops;	 /* number of operations */
-	int			alter;   /* does the operation alter the array? */
-};
-
-/* Each task has a list of undo requests. They are executed automatically
- * when the process exits.
- */
-struct sem_undo {
-	struct list_head	list_proc;	/* per-process list: all undos from one process. */
-						/* rcu protected */
-	struct rcu_head		rcu;		/* rcu struct for sem_undo() */
-	struct sem_undo_list	*ulp;		/* sem_undo_list for the process */
-	struct list_head	list_id;	/* per semaphore array list: all undos for one array */
-	int			semid;		/* semaphore set identifier */
-	short *			semadj;		/* array of adjustments, one per semaphore */
-};
-
-/* sem_undo_list controls shared access to the list of sem_undo structures
- * that may be shared among all a CLONE_SYSVSEM task group.
- */ 
-struct sem_undo_list {
-	atomic_t		refcnt;
-	spinlock_t		lock;
-	struct list_head	list_proc;
-};
+#ifdef CONFIG_SYSVIPC
 
 struct sysv_sem {
 	struct sem_undo_list *undo_list;
 };
 
-#ifdef CONFIG_SYSVIPC
-
 extern int copy_semundo(unsigned long clone_flags, struct task_struct *tsk);
 extern void exit_sem(struct task_struct *tsk);
 
 #else
+
+struct sysv_sem {
+	/* empty */
+};
+
 static inline int copy_semundo(unsigned long clone_flags, struct task_struct *tsk)
 {
 	return 0;
diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h
index 9a1ec10fd504..703cfa33a3ca 100644
--- a/include/linux/sysctl.h
+++ b/include/linux/sysctl.h
@@ -931,6 +931,7 @@ enum
 #ifdef __KERNEL__
 #include <linux/list.h>
 #include <linux/rcupdate.h>
+#include <linux/wait.h>
 
 /* For the /proc/sys support */
 struct ctl_table;
@@ -1011,6 +1012,26 @@ extern int proc_do_large_bitmap(struct ctl_table *, int,
  * cover common cases.
  */
 
+/* Support for userspace poll() to watch for changes */
+struct ctl_table_poll {
+	atomic_t event;
+	wait_queue_head_t wait;
+};
+
+static inline void *proc_sys_poll_event(struct ctl_table_poll *poll)
+{
+	return (void *)(unsigned long)atomic_read(&poll->event);
+}
+
+void proc_sys_poll_notify(struct ctl_table_poll *poll);
+
+#define __CTL_TABLE_POLL_INITIALIZER(name) {				\
+	.event = ATOMIC_INIT(0),					\
+	.wait = __WAIT_QUEUE_HEAD_INITIALIZER(name.wait) }
+
+#define DEFINE_CTL_TABLE_POLL(name)					\
+	struct ctl_table_poll name = __CTL_TABLE_POLL_INITIALIZER(name)
+
 /* A sysctl table is an array of struct ctl_table: */
 struct ctl_table 
 {
@@ -1021,6 +1042,7 @@ struct ctl_table
 	struct ctl_table *child;
 	struct ctl_table *parent;	/* Automatically set */
 	proc_handler *proc_handler;	/* Callback for text formatting */
+	struct ctl_table_poll *poll;
 	void *extra1;
 	void *extra2;
 };
diff --git a/include/linux/utsname.h b/include/linux/utsname.h
index 4e5b0213fdc1..c714ed75eae2 100644
--- a/include/linux/utsname.h
+++ b/include/linux/utsname.h
@@ -37,6 +37,14 @@ struct new_utsname {
 #include <linux/nsproxy.h>
 #include <linux/err.h>
 
+enum uts_proc {
+	UTS_PROC_OSTYPE,
+	UTS_PROC_OSRELEASE,
+	UTS_PROC_VERSION,
+	UTS_PROC_HOSTNAME,
+	UTS_PROC_DOMAINNAME,
+};
+
 struct user_namespace;
 extern struct user_namespace init_user_ns;
 
@@ -80,6 +88,14 @@ static inline struct uts_namespace *copy_utsname(unsigned long flags,
 }
 #endif
 
+#ifdef CONFIG_PROC_SYSCTL
+extern void uts_proc_notify(enum uts_proc proc);
+#else
+static inline void uts_proc_notify(enum uts_proc proc)
+{
+}
+#endif
+
 static inline struct new_utsname *utsname(void)
 {
 	return &current->nsproxy->uts_ns->name;