Merge branch 'for-2.6.31' of git://git.kernel.dk/linux-2.6-block

* 'for-2.6.31' of git://git.kernel.dk/linux-2.6-block: (153 commits)
  block: add request clone interface (v2)
  floppy: fix hibernation
  ramdisk: remove long-deprecated "ramdisk=" boot-time parameter
  fs/bio.c: add missing __user annotation
  block: prevent possible io_context->refcount overflow
  Add serial number support for virtio_blk, V4a
  block: Add missing bounce_pfn stacking and fix comments
  Revert "block: Fix bounce limit setting in DM"
  cciss: decode unit attention in SCSI error handling code
  cciss: Remove no longer needed sendcmd reject processing code
  cciss: change SCSI error handling routines to work with interrupts enabled.
  cciss: separate error processing and command retrying code in sendcmd_withirq_core()
  cciss: factor out fix target status processing code from sendcmd functions
  cciss: simplify interface of sendcmd() and sendcmd_withirq()
  cciss: factor out core of sendcmd_withirq() for use by SCSI error handling code
  cciss: Use schedule_timeout_uninterruptible in SCSI error handling code
  block: needs to set the residual length of a bidi request
  Revert "block: implement blkdev_readpages"
  block: Fix bounce limit setting in DM
  Removed reference to non-existing file Documentation/PCI/PCI-DMA-mapping.txt
  ...

Manually fix conflicts with tracing updates in:
	block/blk-sysfs.c
	drivers/ide/ide-atapi.c
	drivers/ide/ide-cd.c
	drivers/ide/ide-floppy.c
	drivers/ide/ide-tape.c
	include/trace/events/block.h
	kernel/trace/blktrace.c

22 files changed, 389 insertions, 67 deletions

diff --git a/fs/bio.c b/fs/bio.c
index 740699c4f90c..59000215e59b 100644
--- a/fs/bio.c
+++ b/fs/bio.c
@@ -498,11 +498,11 @@ int bio_get_nr_vecs(struct block_device *bdev)
         struct request_queue *q = bdev_get_queue(bdev);
         int nr_pages;
 
-        nr_pages = ((q->max_sectors << 9) + PAGE_SIZE - 1) >> PAGE_SHIFT;
-        if (nr_pages > q->max_phys_segments)
-                nr_pages = q->max_phys_segments;
-        if (nr_pages > q->max_hw_segments)
-                nr_pages = q->max_hw_segments;
+        nr_pages = ((queue_max_sectors(q) << 9) + PAGE_SIZE - 1) >> PAGE_SHIFT;
+        if (nr_pages > queue_max_phys_segments(q))
+                nr_pages = queue_max_phys_segments(q);
+        if (nr_pages > queue_max_hw_segments(q))
+                nr_pages = queue_max_hw_segments(q);
 
         return nr_pages;
 }
@@ -561,8 +561,8 @@ static int __bio_add_page(struct request_queue *q, struct bio *bio, struct page
          * make this too complex.
          */
 
-        while (bio->bi_phys_segments >= q->max_phys_segments
-               || bio->bi_phys_segments >= q->max_hw_segments) {
+        while (bio->bi_phys_segments >= queue_max_phys_segments(q)
+               || bio->bi_phys_segments >= queue_max_hw_segments(q)) {
 
                 if (retried_segments)
                         return 0;
@@ -633,7 +633,8 @@ static int __bio_add_page(struct request_queue *q, struct bio *bio, struct page
 int bio_add_pc_page(struct request_queue *q, struct bio *bio, struct page *page,
                     unsigned int len, unsigned int offset)
 {
-        return __bio_add_page(q, bio, page, len, offset, q->max_hw_sectors);
+        return __bio_add_page(q, bio, page, len, offset,
+                              queue_max_hw_sectors(q));
 }
 
 /**
@@ -653,7 +654,7 @@ int bio_add_page(struct bio *bio, struct page *page, unsigned int len,
                  unsigned int offset)
 {
         struct request_queue *q = bdev_get_queue(bio->bi_bdev);
-        return __bio_add_page(q, bio, page, len, offset, q->max_sectors);
+        return __bio_add_page(q, bio, page, len, offset, queue_max_sectors(q));
 }
 
 struct bio_map_data {
@@ -720,7 +721,7 @@ static int __bio_copy_iov(struct bio *bio, struct bio_vec *iovecs,
 
                 while (bv_len && iov_idx < iov_count) {
                         unsigned int bytes;
-                        char *iov_addr;
+                        char __user *iov_addr;
 
                         bytes = min_t(unsigned int,
                                       iov[iov_idx].iov_len - iov_off, bv_len);
@@ -1200,7 +1201,7 @@ static void bio_copy_kern_endio(struct bio *bio, int err)
                 char *addr = page_address(bvec->bv_page);
                 int len = bmd->iovecs[i].bv_len;
 
-                if (read && !err)
+                if (read)
                         memcpy(p, addr, len);
 
                 __free_page(bvec->bv_page);
@@ -1489,11 +1490,12 @@ struct bio_pair *bio_split(struct bio *bi, int first_sectors)
 sector_t bio_sector_offset(struct bio *bio, unsigned short index,
                            unsigned int offset)
 {
-        unsigned int sector_sz = queue_hardsect_size(bio->bi_bdev->bd_disk->queue);
+        unsigned int sector_sz;
         struct bio_vec *bv;
         sector_t sectors;
         int i;
 
+        sector_sz = queue_logical_block_size(bio->bi_bdev->bd_disk->queue);
         sectors = 0;
 
         if (index >= bio->bi_idx)
diff --git a/fs/block_dev.c b/fs/block_dev.c
index f45dbc18dd17..2dfc6cdcebbe 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -76,7 +76,7 @@ int set_blocksize(struct block_device *bdev, int size)
                 return -EINVAL;
 
         /* Size cannot be smaller than the size supported by the device */
-        if (size < bdev_hardsect_size(bdev))
+        if (size < bdev_logical_block_size(bdev))
                 return -EINVAL;
 
         /* Don't change the size if it is same as current */
@@ -106,7 +106,7 @@ EXPORT_SYMBOL(sb_set_blocksize);
 
 int sb_min_blocksize(struct super_block *sb, int size)
 {
-        int minsize = bdev_hardsect_size(sb->s_bdev);
+        int minsize = bdev_logical_block_size(sb->s_bdev);
         if (size < minsize)
                 size = minsize;
         return sb_set_blocksize(sb, size);
@@ -1111,7 +1111,7 @@ EXPORT_SYMBOL(check_disk_change);
 
 void bd_set_size(struct block_device *bdev, loff_t size)
 {
-        unsigned bsize = bdev_hardsect_size(bdev);
+        unsigned bsize = bdev_logical_block_size(bdev);
 
         bdev->bd_inode->i_size = size;
         while (bsize < PAGE_CACHE_SIZE) {
diff --git a/fs/buffer.c b/fs/buffer.c
index 1864d0b63088..a3ef091a45bd 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -1085,12 +1085,12 @@ static struct buffer_head *
 __getblk_slow(struct block_device *bdev, sector_t block, int size)
 {
         /* Size must be multiple of hard sectorsize */
-        if (unlikely(size & (bdev_hardsect_size(bdev)-1) ||
+        if (unlikely(size & (bdev_logical_block_size(bdev)-1) ||
                         (size < 512 || size > PAGE_SIZE))) {
                 printk(KERN_ERR "getblk(): invalid block size %d requested\n",
                                         size);
-                printk(KERN_ERR "hardsect size: %d\n",
-                                        bdev_hardsect_size(bdev));
+                printk(KERN_ERR "logical block size: %d\n",
+                                        bdev_logical_block_size(bdev));
 
                 dump_stack();
                 return NULL;
diff --git a/fs/coda/file.c b/fs/coda/file.c
index 6a347fbc998a..ffd42815fda1 100644
--- a/fs/coda/file.c
+++ b/fs/coda/file.c
@@ -47,6 +47,8 @@ coda_file_splice_read(struct file *coda_file, loff_t *ppos,
                       struct pipe_inode_info *pipe, size_t count,
                       unsigned int flags)
 {
+        ssize_t (*splice_read)(struct file *, loff_t *,
+                               struct pipe_inode_info *, size_t, unsigned int);
         struct coda_file_info *cfi;
         struct file *host_file;
 
@@ -54,10 +56,11 @@ coda_file_splice_read(struct file *coda_file, loff_t *ppos,
         BUG_ON(!cfi || cfi->cfi_magic != CODA_MAGIC);
         host_file = cfi->cfi_container;
 
-        if (!host_file->f_op || !host_file->f_op->splice_read)
-                return -EINVAL;
+        splice_read = host_file->f_op->splice_read;
+        if (!splice_read)
+                splice_read = default_file_splice_read;
 
-        return host_file->f_op->splice_read(host_file, ppos, pipe, count,flags);
+        return splice_read(host_file, ppos, pipe, count, flags);
 }
 
 static ssize_t
diff --git a/fs/direct-io.c b/fs/direct-io.c
index 05763bbc2050..8b10b87dc01a 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -1127,7 +1127,7 @@ __blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
                 rw = WRITE_ODIRECT;
 
         if (bdev)
-                bdev_blkbits = blksize_bits(bdev_hardsect_size(bdev));
+                bdev_blkbits = blksize_bits(bdev_logical_block_size(bdev));
 
         if (offset & blocksize_mask) {
                 if (bdev)
diff --git a/fs/exofs/osd.c b/fs/exofs/osd.c
index b249ae97fb15..06ca92672eb5 100644
--- a/fs/exofs/osd.c
+++ b/fs/exofs/osd.c
@@ -50,10 +50,10 @@ int exofs_check_ok_resid(struct osd_request *or, u64 *in_resid, u64 *out_resid)
 
         /* FIXME: should be include in osd_sense_info */
         if (in_resid)
-                *in_resid = or->in.req ? or->in.req->data_len : 0;
+                *in_resid = or->in.req ? or->in.req->resid_len : 0;
 
         if (out_resid)
-                *out_resid = or->out.req ? or->out.req->data_len : 0;
+                *out_resid = or->out.req ? or->out.req->resid_len : 0;
 
         return ret;
 }
diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index d8b73d4abe3e..3c70d52afb10 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -1696,7 +1696,7 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
                 goto failed_mount;
         }
 
-        hblock = bdev_hardsect_size(sb->s_bdev);
+        hblock = bdev_logical_block_size(sb->s_bdev);
         if (sb->s_blocksize != blocksize) {
                 /*
                  * Make sure the blocksize for the filesystem is larger
@@ -2120,7 +2120,7 @@ static journal_t *ext3_get_dev_journal(struct super_block *sb,
         }
 
         blocksize = sb->s_blocksize;
-        hblock = bdev_hardsect_size(bdev);
+        hblock = bdev_logical_block_size(bdev);
         if (blocksize < hblock) {
                 printk(KERN_ERR
                         "EXT3-fs: blocksize too small for journal device.\n");
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index c191d0f65fed..f016707597a7 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -3035,7 +3035,7 @@ static journal_t *ext4_get_dev_journal(struct super_block *sb,
         }
 
         blocksize = sb->s_blocksize;
-        hblock = bdev_hardsect_size(bdev);
+        hblock = bdev_logical_block_size(bdev);
         if (blocksize < hblock) {
                 ext4_msg(sb, KERN_ERR,
                         "blocksize too small for journal device");
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index f234aba36fb8..cc34f271b3e7 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -525,11 +525,11 @@ static int init_sb(struct gfs2_sbd *sdp, int silent)
         }
 
         /* Set up the buffer cache and SB for real */
-        if (sdp->sd_sb.sb_bsize < bdev_hardsect_size(sb->s_bdev)) {
+        if (sdp->sd_sb.sb_bsize < bdev_logical_block_size(sb->s_bdev)) {
                 ret = -EINVAL;
                 fs_err(sdp, "FS block size (%u) is too small for device "
                        "block size (%u)\n",
-                       sdp->sd_sb.sb_bsize, bdev_hardsect_size(sb->s_bdev));
+                       sdp->sd_sb.sb_bsize, bdev_logical_block_size(sb->s_bdev));
                 goto out;
         }
         if (sdp->sd_sb.sb_bsize > PAGE_SIZE) {
diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c
index 6122c7ee3648..de3239731db8 100644
--- a/fs/gfs2/rgrp.c
+++ b/fs/gfs2/rgrp.c
@@ -842,7 +842,7 @@ static void gfs2_rgrp_send_discards(struct gfs2_sbd *sdp, u64 offset,
         struct super_block *sb = sdp->sd_vfs;
         struct block_device *bdev = sb->s_bdev;
         const unsigned int sects_per_blk = sdp->sd_sb.sb_bsize /
-                                           bdev_hardsect_size(sb->s_bdev);
+                                           bdev_logical_block_size(sb->s_bdev);
         u64 blk;
         sector_t start = 0;
         sector_t nr_sects = 0;
diff --git a/fs/nilfs2/the_nilfs.c b/fs/nilfs2/the_nilfs.c
index 7f65b3be4aa9..a91f15b8673c 100644
--- a/fs/nilfs2/the_nilfs.c
+++ b/fs/nilfs2/the_nilfs.c
@@ -515,7 +515,7 @@ int init_nilfs(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi, char *data)
 
         blocksize = BLOCK_SIZE << le32_to_cpu(sbp->s_log_block_size);
         if (sb->s_blocksize != blocksize) {
-                int hw_blocksize = bdev_hardsect_size(sb->s_bdev);
+                int hw_blocksize = bdev_logical_block_size(sb->s_bdev);
 
                 if (blocksize < hw_blocksize) {
                         printk(KERN_ERR
diff --git a/fs/ntfs/super.c b/fs/ntfs/super.c
index f76951dcd4a6..6aa7c4713536 100644
--- a/fs/ntfs/super.c
+++ b/fs/ntfs/super.c
@@ -25,7 +25,7 @@
 #include <linux/slab.h>
 #include <linux/string.h>
 #include <linux/spinlock.h>
-#include <linux/blkdev.h>       /* For bdev_hardsect_size(). */
+#include <linux/blkdev.h>       /* For bdev_logical_block_size(). */
 #include <linux/backing-dev.h>
 #include <linux/buffer_head.h>
 #include <linux/vfs.h>
@@ -2785,13 +2785,13 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
                 goto err_out_now;
 
         /* We support sector sizes up to the PAGE_CACHE_SIZE. */
-        if (bdev_hardsect_size(sb->s_bdev) > PAGE_CACHE_SIZE) {
+        if (bdev_logical_block_size(sb->s_bdev) > PAGE_CACHE_SIZE) {
                 if (!silent)
                         ntfs_error(sb, "Device has unsupported sector size "
                                         "(%i).  The maximum supported sector "
                                         "size on this architecture is %lu "
                                         "bytes.",
-                                        bdev_hardsect_size(sb->s_bdev),
+                                        bdev_logical_block_size(sb->s_bdev),
                                         PAGE_CACHE_SIZE);
                 goto err_out_now;
         }
diff --git a/fs/ocfs2/cluster/heartbeat.c b/fs/ocfs2/cluster/heartbeat.c
index 4f85eceab376..09cc25d04611 100644
--- a/fs/ocfs2/cluster/heartbeat.c
+++ b/fs/ocfs2/cluster/heartbeat.c
@@ -1371,7 +1371,7 @@ static ssize_t o2hb_region_dev_write(struct o2hb_region *reg,
 
         bdevname(reg->hr_bdev, reg->hr_dev_name);
 
-        sectsize = bdev_hardsect_size(reg->hr_bdev);
+        sectsize = bdev_logical_block_size(reg->hr_bdev);
         if (sectsize != reg->hr_block_bytes) {
                 mlog(ML_ERROR,
                      "blocksize %u incorrect for device, expected %d",
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index 79ff8d9d37e0..5c6163f55039 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -713,7 +713,7 @@ static int ocfs2_sb_probe(struct super_block *sb,
         *bh = NULL;
 
         /* may be > 512 */
-        *sector_size = bdev_hardsect_size(sb->s_bdev);
+        *sector_size = bdev_logical_block_size(sb->s_bdev);
         if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
                 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
                      *sector_size, OCFS2_MAX_BLOCKSIZE);
diff --git a/fs/partitions/check.c b/fs/partitions/check.c
index 99e33ef40be4..0af36085eb28 100644
--- a/fs/partitions/check.c
+++ b/fs/partitions/check.c
@@ -219,6 +219,13 @@ ssize_t part_size_show(struct device *dev,
         return sprintf(buf, "%llu\n",(unsigned long long)p->nr_sects);
 }
 
+ssize_t part_alignment_offset_show(struct device *dev,
+                                   struct device_attribute *attr, char *buf)
+{
+        struct hd_struct *p = dev_to_part(dev);
+        return sprintf(buf, "%llu\n", (unsigned long long)p->alignment_offset);
+}
+
 ssize_t part_stat_show(struct device *dev,
                        struct device_attribute *attr, char *buf)
 {
@@ -272,6 +279,7 @@ ssize_t part_fail_store(struct device *dev,
 static DEVICE_ATTR(partition, S_IRUGO, part_partition_show, NULL);
 static DEVICE_ATTR(start, S_IRUGO, part_start_show, NULL);
 static DEVICE_ATTR(size, S_IRUGO, part_size_show, NULL);
+static DEVICE_ATTR(alignment_offset, S_IRUGO, part_alignment_offset_show, NULL);
 static DEVICE_ATTR(stat, S_IRUGO, part_stat_show, NULL);
 #ifdef CONFIG_FAIL_MAKE_REQUEST
 static struct device_attribute dev_attr_fail =
@@ -282,6 +290,7 @@ static struct attribute *part_attrs[] = {
         &dev_attr_partition.attr,
         &dev_attr_start.attr,
         &dev_attr_size.attr,
+        &dev_attr_alignment_offset.attr,
         &dev_attr_stat.attr,
 #ifdef CONFIG_FAIL_MAKE_REQUEST
         &dev_attr_fail.attr,
@@ -383,6 +392,7 @@ struct hd_struct *add_partition(struct gendisk *disk, int partno,
         pdev = part_to_dev(p);
 
         p->start_sect = start;
+        p->alignment_offset = queue_sector_alignment_offset(disk->queue, start);
         p->nr_sects = len;
         p->partno = partno;
         p->policy = get_disk_ro(disk);
diff --git a/fs/partitions/ibm.c b/fs/partitions/ibm.c
index 46297683cd34..fc71aab08460 100644
--- a/fs/partitions/ibm.c
+++ b/fs/partitions/ibm.c
@@ -76,7 +76,7 @@ ibm_partition(struct parsed_partitions *state, struct block_device *bdev)
         Sector sect;
 
         res = 0;
-        blocksize = bdev_hardsect_size(bdev);
+        blocksize = bdev_logical_block_size(bdev);
         if (blocksize <= 0)
                 goto out_exit;
         i_size = i_size_read(bdev->bd_inode);
diff --git a/fs/partitions/msdos.c b/fs/partitions/msdos.c
index 796511886f28..0028d2ef0662 100644
--- a/fs/partitions/msdos.c
+++ b/fs/partitions/msdos.c
@@ -110,7 +110,7 @@ parse_extended(struct parsed_partitions *state, struct block_device *bdev,
         Sector sect;
         unsigned char *data;
         u32 this_sector, this_size;
-        int sector_size = bdev_hardsect_size(bdev) / 512;
+        int sector_size = bdev_logical_block_size(bdev) / 512;
         int loopct = 0;         /* number of links followed
                                    without finding a data partition */
         int i;
@@ -415,7 +415,7 @@ static struct {
  
 int msdos_partition(struct parsed_partitions *state, struct block_device *bdev)
 {
-        int sector_size = bdev_hardsect_size(bdev) / 512;
+        int sector_size = bdev_logical_block_size(bdev) / 512;
         Sector sect;
         unsigned char *data;
         struct partition *p;
diff --git a/fs/pipe.c b/fs/pipe.c
index 13414ec45b8d..f7dd21ad85a6 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -302,6 +302,20 @@ int generic_pipe_buf_confirm(struct pipe_inode_info *info,
         return 0;
 }
 
+/**
+ * generic_pipe_buf_release - put a reference to a &struct pipe_buffer
+ * @pipe:       the pipe that the buffer belongs to
+ * @buf:        the buffer to put a reference to
+ *
+ * Description:
+ *      This function releases a reference to @buf.
+ */
+void generic_pipe_buf_release(struct pipe_inode_info *pipe,
+                              struct pipe_buffer *buf)
+{
+        page_cache_release(buf->page);
+}
+
 static const struct pipe_buf_operations anon_pipe_buf_ops = {
         .can_merge = 1,
         .map = generic_pipe_buf_map,
diff --git a/fs/read_write.c b/fs/read_write.c
index 9d1e76bb9ee1..6c8c55dec2bc 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -805,12 +805,6 @@ static ssize_t do_sendfile(int out_fd, int in_fd, loff_t *ppos,
                 goto out;
         if (!(in_file->f_mode & FMODE_READ))
                 goto fput_in;
-        retval = -EINVAL;
-        in_inode = in_file->f_path.dentry->d_inode;
-        if (!in_inode)
-                goto fput_in;
-        if (!in_file->f_op || !in_file->f_op->splice_read)
-                goto fput_in;
         retval = -ESPIPE;
         if (!ppos)
                 ppos = &in_file->f_pos;
@@ -834,6 +828,7 @@ static ssize_t do_sendfile(int out_fd, int in_fd, loff_t *ppos,
         retval = -EINVAL;
         if (!out_file->f_op || !out_file->f_op->sendpage)
                 goto fput_out;
+        in_inode = in_file->f_path.dentry->d_inode;
         out_inode = out_file->f_path.dentry->d_inode;
         retval = rw_verify_area(WRITE, out_file, &out_file->f_pos, count);
         if (retval < 0)
diff --git a/fs/splice.c b/fs/splice.c
index 666953d59a35..73766d24f97b 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -507,9 +507,131 @@ ssize_t generic_file_splice_read(struct file *in, loff_t *ppos,
 
         return ret;
 }
-
 EXPORT_SYMBOL(generic_file_splice_read);
 
+static const struct pipe_buf_operations default_pipe_buf_ops = {
+        .can_merge = 0,
+        .map = generic_pipe_buf_map,
+        .unmap = generic_pipe_buf_unmap,
+        .confirm = generic_pipe_buf_confirm,
+        .release = generic_pipe_buf_release,
+        .steal = generic_pipe_buf_steal,
+        .get = generic_pipe_buf_get,
+};
+
+static ssize_t kernel_readv(struct file *file, const struct iovec *vec,
+                            unsigned long vlen, loff_t offset)
+{
+        mm_segment_t old_fs;
+        loff_t pos = offset;
+        ssize_t res;
+
+        old_fs = get_fs();
+        set_fs(get_ds());
+        /* The cast to a user pointer is valid due to the set_fs() */
+        res = vfs_readv(file, (const struct iovec __user *)vec, vlen, &pos);
+        set_fs(old_fs);
+
+        return res;
+}
+
+static ssize_t kernel_write(struct file *file, const char *buf, size_t count,
+                            loff_t pos)
+{
+        mm_segment_t old_fs;
+        ssize_t res;
+
+        old_fs = get_fs();
+        set_fs(get_ds());
+        /* The cast to a user pointer is valid due to the set_fs() */
+        res = vfs_write(file, (const char __user *)buf, count, &pos);
+        set_fs(old_fs);
+
+        return res;
+}
+
+ssize_t default_file_splice_read(struct file *in, loff_t *ppos,
+                                 struct pipe_inode_info *pipe, size_t len,
+                                 unsigned int flags)
+{
+        unsigned int nr_pages;
+        unsigned int nr_freed;
+        size_t offset;
+        struct page *pages[PIPE_BUFFERS];
+        struct partial_page partial[PIPE_BUFFERS];
+        struct iovec vec[PIPE_BUFFERS];
+        pgoff_t index;
+        ssize_t res;
+        size_t this_len;
+        int error;
+        int i;
+        struct splice_pipe_desc spd = {
+                .pages = pages,
+                .partial = partial,
+                .flags = flags,
+                .ops = &default_pipe_buf_ops,
+                .spd_release = spd_release_page,
+        };
+
+        index = *ppos >> PAGE_CACHE_SHIFT;
+        offset = *ppos & ~PAGE_CACHE_MASK;
+        nr_pages = (len + offset + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
+
+        for (i = 0; i < nr_pages && i < PIPE_BUFFERS && len; i++) {
+                struct page *page;
+
+                page = alloc_page(GFP_USER);
+                error = -ENOMEM;
+                if (!page)
+                        goto err;
+
+                this_len = min_t(size_t, len, PAGE_CACHE_SIZE - offset);
+                vec[i].iov_base = (void __user *) page_address(page);
+                vec[i].iov_len = this_len;
+                pages[i] = page;
+                spd.nr_pages++;
+                len -= this_len;
+                offset = 0;
+        }
+
+        res = kernel_readv(in, vec, spd.nr_pages, *ppos);
+        if (res < 0) {
+                error = res;
+                goto err;
+        }
+
+        error = 0;
+        if (!res)
+                goto err;
+
+        nr_freed = 0;
+        for (i = 0; i < spd.nr_pages; i++) {
+                this_len = min_t(size_t, vec[i].iov_len, res);
+                partial[i].offset = 0;
+                partial[i].len = this_len;
+                if (!this_len) {
+                        __free_page(pages[i]);
+                        pages[i] = NULL;
+                        nr_freed++;
+                }
+                res -= this_len;
+        }
+        spd.nr_pages -= nr_freed;
+
+        res = splice_to_pipe(pipe, &spd);
+        if (res > 0)
+                *ppos += res;
+
+        return res;
+
+err:
+        for (i = 0; i < spd.nr_pages; i++)
+                __free_page(pages[i]);
+
+        return error;
+}
+EXPORT_SYMBOL(default_file_splice_read);
+
 /*
  * Send 'sd->len' bytes to socket from 'sd->file' at position 'sd->pos'
  * using sendpage(). Return the number of bytes sent.
@@ -881,6 +1003,36 @@ generic_file_splice_write(struct pipe_inode_info *pipe, struct file *out,
 
 EXPORT_SYMBOL(generic_file_splice_write);
 
+static int write_pipe_buf(struct pipe_inode_info *pipe, struct pipe_buffer *buf,
+                          struct splice_desc *sd)
+{
+        int ret;
+        void *data;
+
+        ret = buf->ops->confirm(pipe, buf);
+        if (ret)
+                return ret;
+
+        data = buf->ops->map(pipe, buf, 0);
+        ret = kernel_write(sd->u.file, data + buf->offset, sd->len, sd->pos);
+        buf->ops->unmap(pipe, buf, data);
+
+        return ret;
+}
+
+static ssize_t default_file_splice_write(struct pipe_inode_info *pipe,
+                                         struct file *out, loff_t *ppos,
+                                         size_t len, unsigned int flags)
+{
+        ssize_t ret;
+
+        ret = splice_from_pipe(pipe, out, ppos, len, flags, write_pipe_buf);
+        if (ret > 0)
+                *ppos += ret;
+
+        return ret;
+}
+
 /**
  * generic_splice_sendpage - splice data from a pipe to a socket
  * @pipe:       pipe to splice from
@@ -908,11 +1060,10 @@ EXPORT_SYMBOL(generic_splice_sendpage);
 static long do_splice_from(struct pipe_inode_info *pipe, struct file *out,
                            loff_t *ppos, size_t len, unsigned int flags)
 {
+        ssize_t (*splice_write)(struct pipe_inode_info *, struct file *,
+                                loff_t *, size_t, unsigned int);
         int ret;
 
-        if (unlikely(!out->f_op || !out->f_op->splice_write))
-                return -EINVAL;
-
         if (unlikely(!(out->f_mode & FMODE_WRITE)))
                 return -EBADF;
 
@@ -923,7 +1074,11 @@ static long do_splice_from(struct pipe_inode_info *pipe, struct file *out,
         if (unlikely(ret < 0))
                 return ret;
 
-        return out->f_op->splice_write(pipe, out, ppos, len, flags);
+        splice_write = out->f_op->splice_write;
+        if (!splice_write)
+                splice_write = default_file_splice_write;
+
+        return splice_write(pipe, out, ppos, len, flags);
 }
 
 /*
@@ -933,11 +1088,10 @@ static long do_splice_to(struct file *in, loff_t *ppos,
                          struct pipe_inode_info *pipe, size_t len,
                          unsigned int flags)
 {
+        ssize_t (*splice_read)(struct file *, loff_t *,
+                               struct pipe_inode_info *, size_t, unsigned int);
         int ret;
 
-        if (unlikely(!in->f_op || !in->f_op->splice_read))
-                return -EINVAL;
-
         if (unlikely(!(in->f_mode & FMODE_READ)))
                 return -EBADF;
 
@@ -945,7 +1099,11 @@ static long do_splice_to(struct file *in, loff_t *ppos,
         if (unlikely(ret < 0))
                 return ret;
 
-        return in->f_op->splice_read(in, ppos, pipe, len, flags);
+        splice_read = in->f_op->splice_read;
+        if (!splice_read)
+                splice_read = default_file_splice_read;
+
+        return splice_read(in, ppos, pipe, len, flags);
 }
 
 /**
@@ -1112,6 +1270,9 @@ long do_splice_direct(struct file *in, loff_t *ppos, struct file *out,
         return ret;
 }
 
+static int splice_pipe_to_pipe(struct pipe_inode_info *ipipe,
+                               struct pipe_inode_info *opipe,
+                               size_t len, unsigned int flags);
 /*
  * After the inode slimming patch, i_pipe/i_bdev/i_cdev share the same
  * location, so checking ->i_pipe is not enough to verify that this is a
@@ -1132,12 +1293,32 @@ static long do_splice(struct file *in, loff_t __user *off_in,
                       struct file *out, loff_t __user *off_out,
                       size_t len, unsigned int flags)
 {
-        struct pipe_inode_info *pipe;
+        struct pipe_inode_info *ipipe;
+        struct pipe_inode_info *opipe;
         loff_t offset, *off;
         long ret;
 
-        pipe = pipe_info(in->f_path.dentry->d_inode);
-        if (pipe) {
+        ipipe = pipe_info(in->f_path.dentry->d_inode);
+        opipe = pipe_info(out->f_path.dentry->d_inode);
+
+        if (ipipe && opipe) {
+                if (off_in || off_out)
+                        return -ESPIPE;
+
+                if (!(in->f_mode & FMODE_READ))
+                        return -EBADF;
+
+                if (!(out->f_mode & FMODE_WRITE))
+                        return -EBADF;
+
+                /* Splicing to self would be fun, but... */
+                if (ipipe == opipe)
+                        return -EINVAL;
+
+                return splice_pipe_to_pipe(ipipe, opipe, len, flags);
+        }
+
+        if (ipipe) {
                 if (off_in)
                         return -ESPIPE;
                 if (off_out) {
@@ -1149,7 +1330,7 @@ static long do_splice(struct file *in, loff_t __user *off_in,
                 } else
                         off = &out->f_pos;
 
-                ret = do_splice_from(pipe, out, off, len, flags);
+                ret = do_splice_from(ipipe, out, off, len, flags);
 
                 if (off_out && copy_to_user(off_out, off, sizeof(loff_t)))
                         ret = -EFAULT;
@@ -1157,8 +1338,7 @@ static long do_splice(struct file *in, loff_t __user *off_in,
                 return ret;
         }
 
-        pipe = pipe_info(out->f_path.dentry->d_inode);
-        if (pipe) {
+        if (opipe) {
                 if (off_out)
                         return -ESPIPE;
                 if (off_in) {
@@ -1170,7 +1350,7 @@ static long do_splice(struct file *in, loff_t __user *off_in,
                 } else
                         off = &in->f_pos;
 
-                ret = do_splice_to(in, off, pipe, len, flags);
+                ret = do_splice_to(in, off, opipe, len, flags);
 
                 if (off_in && copy_to_user(off_in, off, sizeof(loff_t)))
                         ret = -EFAULT;
@@ -1511,7 +1691,7 @@ SYSCALL_DEFINE6(splice, int, fd_in, loff_t __user *, off_in,
  * Make sure there's data to read. Wait for input if we can, otherwise
  * return an appropriate error.
  */
-static int link_ipipe_prep(struct pipe_inode_info *pipe, unsigned int flags)
+static int ipipe_prep(struct pipe_inode_info *pipe, unsigned int flags)
 {
         int ret;
 
@@ -1549,7 +1729,7 @@ static int link_ipipe_prep(struct pipe_inode_info *pipe, unsigned int flags)
  * Make sure there's writeable room. Wait for room if we can, otherwise
  * return an appropriate error.
  */
-static int link_opipe_prep(struct pipe_inode_info *pipe, unsigned int flags)
+static int opipe_prep(struct pipe_inode_info *pipe, unsigned int flags)
 {
         int ret;
 
@@ -1587,6 +1767,124 @@ static int link_opipe_prep(struct pipe_inode_info *pipe, unsigned int flags)
 }
 
 /*
+ * Splice contents of ipipe to opipe.
+ */
+static int splice_pipe_to_pipe(struct pipe_inode_info *ipipe,
+                               struct pipe_inode_info *opipe,
+                               size_t len, unsigned int flags)
+{
+        struct pipe_buffer *ibuf, *obuf;
+        int ret = 0, nbuf;
+        bool input_wakeup = false;
+
+
+retry:
+        ret = ipipe_prep(ipipe, flags);
+        if (ret)
+                return ret;
+
+        ret = opipe_prep(opipe, flags);
+        if (ret)
+                return ret;
+
+        /*
+         * Potential ABBA deadlock, work around it by ordering lock
+         * grabbing by pipe info address. Otherwise two different processes
+         * could deadlock (one doing tee from A -> B, the other from B -> A).
+         */
+        pipe_double_lock(ipipe, opipe);
+
+        do {
+                if (!opipe->readers) {
+                        send_sig(SIGPIPE, current, 0);
+                        if (!ret)
+                                ret = -EPIPE;
+                        break;
+                }
+
+                if (!ipipe->nrbufs && !ipipe->writers)
+                        break;
+
+                /*
+                 * Cannot make any progress, because either the input
+                 * pipe is empty or the output pipe is full.
+                 */
+                if (!ipipe->nrbufs || opipe->nrbufs >= PIPE_BUFFERS) {
+                        /* Already processed some buffers, break */
+                        if (ret)
+                                break;
+
+                        if (flags & SPLICE_F_NONBLOCK) {
+                                ret = -EAGAIN;
+                                break;
+                        }
+
+                        /*
+                         * We raced with another reader/writer and haven't
+                         * managed to process any buffers.  A zero return
+                         * value means EOF, so retry instead.
+                         */
+                        pipe_unlock(ipipe);
+                        pipe_unlock(opipe);
+                        goto retry;
+                }
+
+                ibuf = ipipe->bufs + ipipe->curbuf;
+                nbuf = (opipe->curbuf + opipe->nrbufs) % PIPE_BUFFERS;
+                obuf = opipe->bufs + nbuf;
+
+                if (len >= ibuf->len) {
+                        /*
+                         * Simply move the whole buffer from ipipe to opipe
+                         */
+                        *obuf = *ibuf;
+                        ibuf->ops = NULL;
+                        opipe->nrbufs++;
+                        ipipe->curbuf = (ipipe->curbuf + 1) % PIPE_BUFFERS;
+                        ipipe->nrbufs--;
+                        input_wakeup = true;
+                } else {
+                        /*
+                         * Get a reference to this pipe buffer,
+                         * so we can copy the contents over.
+                         */
+                        ibuf->ops->get(ipipe, ibuf);
+                        *obuf = *ibuf;
+
+                        /*
+                         * Don't inherit the gift flag, we need to
+                         * prevent multiple steals of this page.
+                         */
+                        obuf->flags &= ~PIPE_BUF_FLAG_GIFT;
+
+                        obuf->len = len;
+                        opipe->nrbufs++;
+                        ibuf->offset += obuf->len;
+                        ibuf->len -= obuf->len;
+                }
+                ret += obuf->len;
+                len -= obuf->len;
+        } while (len);
+
+        pipe_unlock(ipipe);
+        pipe_unlock(opipe);
+
+        /*
+         * If we put data in the output pipe, wakeup any potential readers.
+         */
+        if (ret > 0) {
+                smp_mb();
+                if (waitqueue_active(&opipe->wait))
+                        wake_up_interruptible(&opipe->wait);
+                kill_fasync(&opipe->fasync_readers, SIGIO, POLL_IN);
+        }
+        if (input_wakeup)
+                wakeup_pipe_writers(ipipe);
+
+        return ret;
+}
+
+/*
  * Link contents of ipipe to opipe.
  */
 static int link_pipe(struct pipe_inode_info *ipipe,
@@ -1690,9 +1988,9 @@ static long do_tee(struct file *in, struct file *out, size_t len,
                  * Keep going, unless we encounter an error. The ipipe/opipe
                  * ordering doesn't really matter.
                  */
-                ret = link_ipipe_prep(ipipe, flags);
+                ret = ipipe_prep(ipipe, flags);
                 if (!ret) {
-                        ret = link_opipe_prep(opipe, flags);
+                        ret = opipe_prep(opipe, flags);
                         if (!ret)
                                 ret = link_pipe(ipipe, opipe, len, flags);
                 }
diff --git a/fs/udf/super.c b/fs/udf/super.c
index 72348cc855a4..0ba44107d8f1 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -1915,7 +1915,7 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
         if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) {
                 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
         } else {
-                uopt.blocksize = bdev_hardsect_size(sb->s_bdev);
+                uopt.blocksize = bdev_logical_block_size(sb->s_bdev);
                 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
                 if (!ret && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) {
                         if (!silent)
diff --git a/fs/xfs/linux-2.6/xfs_buf.c b/fs/xfs/linux-2.6/xfs_buf.c
index e28800a9f2b5..1418b916fc27 100644
--- a/fs/xfs/linux-2.6/xfs_buf.c
+++ b/fs/xfs/linux-2.6/xfs_buf.c
@@ -1501,7 +1501,7 @@ xfs_setsize_buftarg_early(
         struct block_device     *bdev)
 {
         return xfs_setsize_buftarg_flags(btp,
-                        PAGE_CACHE_SIZE, bdev_hardsect_size(bdev), 0);
+                        PAGE_CACHE_SIZE, bdev_logical_block_size(bdev), 0);
 }
 
 int