Merge branch 'master' into for-linus

64 files changed, 1962 insertions, 900 deletions

diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h
index 7628219e5386..35b00746c712 100644
--- a/include/linux/backing-dev.h
+++ b/include/linux/backing-dev.h
@@ -31,6 +31,7 @@ enum bdi_state {
 	BDI_async_congested,	/* The async (write) queue is getting full */
 	BDI_sync_congested,	/* The sync queue is getting full */
 	BDI_registered,		/* bdi_register() was done */
+	BDI_writeback_running,	/* Writeback is in progress */
 	BDI_unused,		/* Available bits start here */
 };
 
diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index 53691774d34e..ca83a97c9715 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -150,6 +150,7 @@ enum rq_flag_bits {
 	__REQ_FLUSH,		/* request for cache flush */
 	__REQ_IO_STAT,		/* account I/O stat */
 	__REQ_MIXED_MERGE,	/* merge of different types, fail separately */
+	__REQ_SECURE,		/* secure discard (used with __REQ_DISCARD) */
 	__REQ_NR_BITS,		/* stops here */
 };
 
@@ -190,5 +191,6 @@ enum rq_flag_bits {
 #define REQ_FLUSH		(1 << __REQ_FLUSH)
 #define REQ_IO_STAT		(1 << __REQ_IO_STAT)
 #define REQ_MIXED_MERGE		(1 << __REQ_MIXED_MERGE)
+#define REQ_SECURE		(1 << __REQ_SECURE)
 
 #endif /* __LINUX_BLK_TYPES_H */
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 89c855c5655c..2c54906f678f 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -389,6 +389,7 @@ struct request_queue
 #define QUEUE_FLAG_DISCARD     16	/* supports DISCARD */
 #define QUEUE_FLAG_NOXMERGES   17	/* No extended merges */
 #define QUEUE_FLAG_ADD_RANDOM  18	/* Contributes to random pool */
+#define QUEUE_FLAG_SECDISCARD  19	/* supports SECDISCARD */
 
 #define QUEUE_FLAG_DEFAULT	((1 << QUEUE_FLAG_IO_STAT) |		\
 				 (1 << QUEUE_FLAG_CLUSTER) |		\
@@ -524,6 +525,8 @@ enum {
 #define blk_queue_stackable(q)	\
 	test_bit(QUEUE_FLAG_STACKABLE, &(q)->queue_flags)
 #define blk_queue_discard(q)	test_bit(QUEUE_FLAG_DISCARD, &(q)->queue_flags)
+#define blk_queue_secdiscard(q)	(blk_queue_discard(q) && \
+	test_bit(QUEUE_FLAG_SECDISCARD, &(q)->queue_flags))
 
 #define blk_noretry_request(rq) \
 	((rq)->cmd_flags & (REQ_FAILFAST_DEV|REQ_FAILFAST_TRANSPORT| \
@@ -918,10 +921,12 @@ static inline struct request *blk_map_queue_find_tag(struct blk_queue_tag *bqt,
 }
 enum{
 	BLKDEV_WAIT,	/* wait for completion */
-	BLKDEV_BARRIER,	/*issue request with barrier */
+	BLKDEV_BARRIER,	/* issue request with barrier */
+	BLKDEV_SECURE,	/* secure discard */
 };
 #define BLKDEV_IFL_WAIT		(1 << BLKDEV_WAIT)
 #define BLKDEV_IFL_BARRIER	(1 << BLKDEV_BARRIER)
+#define BLKDEV_IFL_SECURE	(1 << BLKDEV_SECURE)
 extern int blkdev_issue_flush(struct block_device *, gfp_t, sector_t *,
 			unsigned long);
 extern int blkdev_issue_discard(struct block_device *bdev, sector_t sector,
diff --git a/include/linux/dcache.h b/include/linux/dcache.h
index d23be0386e2d..6a4aea30aa09 100644
--- a/include/linux/dcache.h
+++ b/include/linux/dcache.h
@@ -315,6 +315,7 @@ extern char *dynamic_dname(struct dentry *, char *, int, const char *, ...);
 
 extern char *__d_path(const struct path *path, struct path *root, char *, int);
 extern char *d_path(const struct path *, char *, int);
+extern char *d_path_with_unreachable(const struct path *, char *, int);
 extern char *__dentry_path(struct dentry *, char *, int);
 extern char *dentry_path(struct dentry *, char *, int);
 
diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h
index 1381cd97b4ed..2970022faa63 100644
--- a/include/linux/device-mapper.h
+++ b/include/linux/device-mapper.h
@@ -22,7 +22,7 @@ typedef enum { STATUSTYPE_INFO, STATUSTYPE_TABLE } status_type_t;
 union map_info {
 	void *ptr;
 	unsigned long long ll;
-	unsigned flush_request;
+	unsigned target_request_nr;
 };
 
 /*
@@ -174,12 +174,18 @@ struct dm_target {
 	 * A number of zero-length barrier requests that will be submitted
 	 * to the target for the purpose of flushing cache.
 	 *
-	 * The request number will be placed in union map_info->flush_request.
+	 * The request number will be placed in union map_info->target_request_nr.
 	 * It is a responsibility of the target driver to remap these requests
 	 * to the real underlying devices.
 	 */
 	unsigned num_flush_requests;
 
+	/*
+	 * The number of discard requests that will be submitted to the
+	 * target.  map_info->request_nr is used just like num_flush_requests.
+	 */
+	unsigned num_discard_requests;
+
 	/* target specific data */
 	void *private;
 
@@ -392,6 +398,12 @@ void *dm_vcalloc(unsigned long nmemb, unsigned long elem_size);
 #define dm_array_too_big(fixed, obj, num) \
 	((num) > (UINT_MAX - (fixed)) / (obj))
 
+/*
+ * Sector offset taken relative to the start of the target instead of
+ * relative to the start of the device.
+ */
+#define dm_target_offset(ti, sector) ((sector) - (ti)->begin)
+
 static inline sector_t to_sector(unsigned long n)
 {
 	return (n >> SECTOR_SHIFT);
diff --git a/include/linux/dm-ioctl.h b/include/linux/dm-ioctl.h
index 2c445e113790..49eab360d5d4 100644
--- a/include/linux/dm-ioctl.h
+++ b/include/linux/dm-ioctl.h
@@ -11,6 +11,7 @@
 #include <linux/types.h>
 
 #define DM_DIR "mapper"		/* Slashes not supported */
+#define DM_CONTROL_NODE "control"
 #define DM_MAX_TYPE_NAME 16
 #define DM_NAME_LEN 128
 #define DM_UUID_LEN 129
@@ -266,9 +267,9 @@ enum {
 #define DM_DEV_SET_GEOMETRY	_IOWR(DM_IOCTL, DM_DEV_SET_GEOMETRY_CMD, struct dm_ioctl)
 
 #define DM_VERSION_MAJOR	4
-#define DM_VERSION_MINOR	17
+#define DM_VERSION_MINOR	18
 #define DM_VERSION_PATCHLEVEL	0
-#define DM_VERSION_EXTRA	"-ioctl (2010-03-05)"
+#define DM_VERSION_EXTRA	"-ioctl (2010-06-29)"
 
 /* Status bits */
 #define DM_READONLY_FLAG	(1 << 0) /* In/Out */
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index 89b7e1a605b8..e0670a512056 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -142,6 +142,14 @@ static inline int dma_set_seg_boundary(struct device *dev, unsigned long mask)
 		return -EIO;
 }
 
+static inline int dma_get_cache_alignment(void)
+{
+#ifdef ARCH_DMA_MINALIGN
+	return ARCH_DMA_MINALIGN;
+#endif
+	return 1;
+}
+
 /* flags for the coherent memory api */
 #define	DMA_MEMORY_MAP			0x01
 #define DMA_MEMORY_IO			0x02
diff --git a/include/linux/etherdevice.h b/include/linux/etherdevice.h
index 848480bc2bf9..2308fbb4523a 100644
--- a/include/linux/etherdevice.h
+++ b/include/linux/etherdevice.h
@@ -129,7 +129,7 @@ static inline void random_ether_addr(u8 *addr)
 /**
  * dev_hw_addr_random - Create random MAC and set device flag
  * @dev: pointer to net_device structure
- * @addr: Pointer to a six-byte array containing the Ethernet address
+ * @hwaddr: Pointer to a six-byte array containing the Ethernet address
  *
  * Generate random MAC to be used by a device and set addr_assign_type
  * so the state can be read by sysfs and be used by udev.
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 1542e0e52b2e..7a0625e26a39 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -93,7 +93,7 @@ struct inodes_stat_t {
 #define FMODE_RANDOM		((__force fmode_t)0x1000)
 
 /* File was opened by fanotify and shouldn't generate fanotify events */
-#define FMODE_NONOTIFY		((__force fmode_t)16777216) /* 0x1000000 */
+#define FMODE_NONOTIFY		((__force fmode_t)0x1000000)
 
 /*
  * The below are the various read and write types that we support. Some of
@@ -174,6 +174,7 @@ struct inodes_stat_t {
  */
 #define DISCARD_NOBARRIER	(WRITE | REQ_DISCARD)
 #define DISCARD_BARRIER		(WRITE | REQ_DISCARD | REQ_HARDBARRIER)
+#define DISCARD_SECURE		(DISCARD_NOBARRIER | REQ_SECURE)
 
 #define SEL_IN		1
 #define SEL_OUT		2
@@ -317,6 +318,7 @@ struct inodes_stat_t {
 #define BLKALIGNOFF _IO(0x12,122)
 #define BLKPBSZGET _IO(0x12,123)
 #define BLKDISCARDZEROES _IO(0x12,124)
+#define BLKSECDISCARD _IO(0x12,125)
 
 #define BMAP_IOCTL 1		/* obsolete - kept for compatibility */
 #define FIBMAP	   _IO(0x00,1)	/* bmap access */
diff --git a/include/linux/fs_struct.h b/include/linux/fs_struct.h
index 78a05bfcd8eb..eca3d5202138 100644
--- a/include/linux/fs_struct.h
+++ b/include/linux/fs_struct.h
@@ -21,4 +21,31 @@ extern void free_fs_struct(struct fs_struct *);
 extern void daemonize_fs_struct(void);
 extern int unshare_fs_struct(void);
 
+static inline void get_fs_root(struct fs_struct *fs, struct path *root)
+{
+	read_lock(&fs->lock);
+	*root = fs->root;
+	path_get(root);
+	read_unlock(&fs->lock);
+}
+
+static inline void get_fs_pwd(struct fs_struct *fs, struct path *pwd)
+{
+	read_lock(&fs->lock);
+	*pwd = fs->pwd;
+	path_get(pwd);
+	read_unlock(&fs->lock);
+}
+
+static inline void get_fs_root_and_pwd(struct fs_struct *fs, struct path *root,
+				       struct path *pwd)
+{
+	read_lock(&fs->lock);
+	*root = fs->root;
+	path_get(root);
+	*pwd = fs->pwd;
+	path_get(pwd);
+	read_unlock(&fs->lock);
+}
+
 #endif /* _LINUX_FS_STRUCT_H */
diff --git a/include/linux/fsnotify.h b/include/linux/fsnotify.h
index e4e2204187ee..59d0df43ff9d 100644
--- a/include/linux/fsnotify.h
+++ b/include/linux/fsnotify.h
@@ -26,18 +26,19 @@ static inline void fsnotify_d_instantiate(struct dentry *dentry,
 }
 
 /* Notify this dentry's parent about a child's events. */
-static inline void fsnotify_parent(struct file *file, struct dentry *dentry, __u32 mask)
+static inline void fsnotify_parent(struct path *path, struct dentry *dentry, __u32 mask)
 {
 	if (!dentry)
-		dentry = file->f_path.dentry;
+		dentry = path->dentry;
 
-	__fsnotify_parent(file, dentry, mask);
+	__fsnotify_parent(path, dentry, mask);
 }
 
 /* simple call site for access decisions */
 static inline int fsnotify_perm(struct file *file, int mask)
 {
-	struct inode *inode = file->f_path.dentry->d_inode;
+	struct path *path = &file->f_path;
+	struct inode *inode = path->dentry->d_inode;
 	__u32 fsnotify_mask = 0;
 
 	if (file->f_mode & FMODE_NONOTIFY)
@@ -51,7 +52,7 @@ static inline int fsnotify_perm(struct file *file, int mask)
 	else
 		BUG();
 
-	return fsnotify(inode, fsnotify_mask, file, FSNOTIFY_EVENT_FILE, NULL, 0);
+	return fsnotify(inode, fsnotify_mask, path, FSNOTIFY_EVENT_PATH, NULL, 0);
 }
 
 /*
@@ -186,15 +187,16 @@ static inline void fsnotify_mkdir(struct inode *inode, struct dentry *dentry)
  */
 static inline void fsnotify_access(struct file *file)
 {
-	struct inode *inode = file->f_path.dentry->d_inode;
+	struct path *path = &file->f_path;
+	struct inode *inode = path->dentry->d_inode;
 	__u32 mask = FS_ACCESS;
 
 	if (S_ISDIR(inode->i_mode))
 		mask |= FS_IN_ISDIR;
 
 	if (!(file->f_mode & FMODE_NONOTIFY)) {
-		fsnotify_parent(file, NULL, mask);
-		fsnotify(inode, mask, file, FSNOTIFY_EVENT_FILE, NULL, 0);
+		fsnotify_parent(path, NULL, mask);
+		fsnotify(inode, mask, path, FSNOTIFY_EVENT_PATH, NULL, 0);
 	}
 }
 
@@ -203,15 +205,16 @@ static inline void fsnotify_access(struct file *file)
  */
 static inline void fsnotify_modify(struct file *file)
 {
-	struct inode *inode = file->f_path.dentry->d_inode;
+	struct path *path = &file->f_path;
+	struct inode *inode = path->dentry->d_inode;
 	__u32 mask = FS_MODIFY;
 
 	if (S_ISDIR(inode->i_mode))
 		mask |= FS_IN_ISDIR;
 
 	if (!(file->f_mode & FMODE_NONOTIFY)) {
-		fsnotify_parent(file, NULL, mask);
-		fsnotify(inode, mask, file, FSNOTIFY_EVENT_FILE, NULL, 0);
+		fsnotify_parent(path, NULL, mask);
+		fsnotify(inode, mask, path, FSNOTIFY_EVENT_PATH, NULL, 0);
 	}
 }
 
@@ -220,15 +223,16 @@ static inline void fsnotify_modify(struct file *file)
  */
 static inline void fsnotify_open(struct file *file)
 {
-	struct inode *inode = file->f_path.dentry->d_inode;
+	struct path *path = &file->f_path;
+	struct inode *inode = path->dentry->d_inode;
 	__u32 mask = FS_OPEN;
 
 	if (S_ISDIR(inode->i_mode))
 		mask |= FS_IN_ISDIR;
 
 	if (!(file->f_mode & FMODE_NONOTIFY)) {
-		fsnotify_parent(file, NULL, mask);
-		fsnotify(inode, mask, file, FSNOTIFY_EVENT_FILE, NULL, 0);
+		fsnotify_parent(path, NULL, mask);
+		fsnotify(inode, mask, path, FSNOTIFY_EVENT_PATH, NULL, 0);
 	}
 }
 
@@ -237,6 +241,7 @@ static inline void fsnotify_open(struct file *file)
  */
 static inline void fsnotify_close(struct file *file)
 {
+	struct path *path = &file->f_path;
 	struct inode *inode = file->f_path.dentry->d_inode;
 	fmode_t mode = file->f_mode;
 	__u32 mask = (mode & FMODE_WRITE) ? FS_CLOSE_WRITE : FS_CLOSE_NOWRITE;
@@ -245,8 +250,8 @@ static inline void fsnotify_close(struct file *file)
 		mask |= FS_IN_ISDIR;
 
 	if (!(file->f_mode & FMODE_NONOTIFY)) {
-		fsnotify_parent(file, NULL, mask);
-		fsnotify(inode, mask, file, FSNOTIFY_EVENT_FILE, NULL, 0);
+		fsnotify_parent(path, NULL, mask);
+		fsnotify(inode, mask, path, FSNOTIFY_EVENT_PATH, NULL, 0);
 	}
 }
 
diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h
index 9bbfd7204b04..ed36fb57c426 100644
--- a/include/linux/fsnotify_backend.h
+++ b/include/linux/fsnotify_backend.h
@@ -203,20 +203,20 @@ struct fsnotify_event {
 	/* to_tell may ONLY be dereferenced during handle_event(). */
 	struct inode *to_tell;	/* either the inode the event happened to or its parent */
 	/*
-	 * depending on the event type we should have either a file or inode
-	 * We hold a reference on file, but NOT on inode.  Since we have the ref on
-	 * the file, it may be dereferenced at any point during this object's
+	 * depending on the event type we should have either a path or inode
+	 * We hold a reference on path, but NOT on inode.  Since we have the ref on
+	 * the path, it may be dereferenced at any point during this object's
 	 * lifetime.  That reference is dropped when this object's refcnt hits
-	 * 0.  If this event contains an inode instead of a file, the inode may
+	 * 0.  If this event contains an inode instead of a path, the inode may
 	 * ONLY be used during handle_event().
 	 */
 	union {
-		struct file *file;
+		struct path path;
 		struct inode *inode;
 	};
 /* when calling fsnotify tell it if the data is a path or inode */
 #define FSNOTIFY_EVENT_NONE	0
-#define FSNOTIFY_EVENT_FILE	1
+#define FSNOTIFY_EVENT_PATH	1
 #define FSNOTIFY_EVENT_INODE	2
 	int data_type;		/* which of the above union we have */
 	atomic_t refcnt;	/* how many groups still are using/need to send this event */
@@ -293,7 +293,7 @@ struct fsnotify_mark {
 /* main fsnotify call to send events */
 extern int fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is,
 		    const unsigned char *name, u32 cookie);
-extern void __fsnotify_parent(struct file *file, struct dentry *dentry, __u32 mask);
+extern void __fsnotify_parent(struct path *path, struct dentry *dentry, __u32 mask);
 extern void __fsnotify_inode_delete(struct inode *inode);
 extern void __fsnotify_vfsmount_delete(struct vfsmount *mnt);
 extern u32 fsnotify_get_cookie(void);
@@ -422,7 +422,7 @@ static inline int fsnotify(struct inode *to_tell, __u32 mask, void *data, int da
 	return 0;
 }
 
-static inline void __fsnotify_parent(struct file *file, struct dentry *dentry, __u32 mask)
+static inline void __fsnotify_parent(struct path *path, struct dentry *dentry, __u32 mask)
 {}
 
 static inline void __fsnotify_inode_delete(struct inode *inode)
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index 78b4bc64c006..f479700df61b 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -2,6 +2,7 @@
 #define _LINUX_HUGETLB_H
 
 #include <linux/fs.h>
+#include <linux/hugetlb_inline.h>
 
 struct ctl_table;
 struct user_struct;
@@ -14,11 +15,6 @@ struct user_struct;
 
 int PageHuge(struct page *page);
 
-static inline int is_vm_hugetlb_page(struct vm_area_struct *vma)
-{
-	return vma->vm_flags & VM_HUGETLB;
-}
-
 void reset_vma_resv_huge_pages(struct vm_area_struct *vma);
 int hugetlb_sysctl_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *);
 int hugetlb_overcommit_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *);
@@ -47,6 +43,7 @@ int hugetlb_reserve_pages(struct inode *inode, long from, long to,
 						struct vm_area_struct *vma,
 						int acctflags);
 void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed);
+void __isolate_hwpoisoned_huge_page(struct page *page);
 
 extern unsigned long hugepages_treat_as_movable;
 extern const unsigned long hugetlb_zero, hugetlb_infinity;
@@ -77,11 +74,6 @@ static inline int PageHuge(struct page *page)
 	return 0;
 }
 
-static inline int is_vm_hugetlb_page(struct vm_area_struct *vma)
-{
-	return 0;
-}
-
 static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma)
 {
 }
@@ -108,6 +100,8 @@ static inline void hugetlb_report_meminfo(struct seq_file *m)
 #define is_hugepage_only_range(mm, addr, len)	0
 #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; })
 #define hugetlb_fault(mm, vma, addr, flags)	({ BUG(); 0; })
+#define huge_pte_offset(mm, address)	0
+#define __isolate_hwpoisoned_huge_page(page)	0
 
 #define hugetlb_change_protection(vma, address, end, newprot)
 
diff --git a/include/linux/hugetlb_inline.h b/include/linux/hugetlb_inline.h
new file mode 100644
index 000000000000..6931489a5c14
--- /dev/null
+++ b/include/linux/hugetlb_inline.h
@@ -0,0 +1,22 @@
+#ifndef _LINUX_HUGETLB_INLINE_H
+#define _LINUX_HUGETLB_INLINE_H
+
+#ifdef CONFIG_HUGETLB_PAGE
+
+#include <linux/mm.h>
+
+static inline int is_vm_hugetlb_page(struct vm_area_struct *vma)
+{
+	return vma->vm_flags & VM_HUGETLB;
+}
+
+#else
+
+static inline int is_vm_hugetlb_page(struct vm_area_struct *vma)
+{
+	return 0;
+}
+
+#endif
+
+#endif
diff --git a/include/linux/i2c-mux.h b/include/linux/i2c-mux.h
new file mode 100644
index 000000000000..34536effd652
--- /dev/null
+++ b/include/linux/i2c-mux.h
@@ -0,0 +1,46 @@
+/*
+ *
+ * i2c-mux.h - functions for the i2c-bus mux support
+ *
+ * Copyright (c) 2008-2009 Rodolfo Giometti <giometti@linux.it>
+ * Copyright (c) 2008-2009 Eurotech S.p.A. <info@eurotech.it>
+ * Michael Lawnick <michael.lawnick.ext@nsn.com>
+ *
+ * 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