staging: comedi: ni_labpc_cs: use comedi_pcmcia_{enable,disable}

[pandora-kernel.git] / fs / block_dev.c

diff --git a/fs/block_dev.c b/fs/block_dev.c
index a1e09b4..172f849 100644 (file)
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -321,7 +321,7 @@ static int blkdev_write_end(struct file *file, struct address_space *mapping,
  * for a block special file file->f_path.dentry->d_inode->i_size is zero
  * so we compute the size by hand (just as in block_read/write above)
  */
-static loff_t block_llseek(struct file *file, loff_t offset, int origin)
+static loff_t block_llseek(struct file *file, loff_t offset, int whence)
 {
        struct inode *bd_inode = file->f_mapping->host;
        loff_t size;
@@ -331,7 +331,7 @@ static loff_t block_llseek(struct file *file, loff_t offset, int origin)
        size = i_size_read(bd_inode);
 
        retval = -EINVAL;
-       switch (origin) {
+       switch (whence) {
                case SEEK_END:
                        offset += size;
                        break;
@@ -1544,6 +1544,22 @@ ssize_t blkdev_aio_write(struct kiocb *iocb, const struct iovec *iov,
 }
 EXPORT_SYMBOL_GPL(blkdev_aio_write);
 
+static ssize_t blkdev_aio_read(struct kiocb *iocb, const struct iovec *iov,
+                        unsigned long nr_segs, loff_t pos)
+{
+       struct file *file = iocb->ki_filp;
+       struct inode *bd_inode = file->f_mapping->host;
+       loff_t size = i_size_read(bd_inode);
+
+       if (pos >= size)
+               return 0;
+
+       size -= pos;
+       if (size < INT_MAX)
+               nr_segs = iov_shorten((struct iovec *)iov, nr_segs, size);
+       return generic_file_aio_read(iocb, iov, nr_segs, pos);
+}
+
 /*
  * Try to release a page associated with block device when the system
  * is under memory pressure.
@@ -1574,7 +1590,7 @@ const struct file_operations def_blk_fops = {
        .llseek         = block_llseek,
        .read           = do_sync_read,
        .write          = do_sync_write,
-       .aio_read       = generic_file_aio_read,
+       .aio_read       = blkdev_aio_read,
        .aio_write      = blkdev_aio_write,
        .mmap           = generic_file_mmap,
        .fsync          = blkdev_fsync,