Merge branch 'for-linus/i2c-2636' of git://git.fluff.org/bjdooks/linux

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

diff --git a/fs/block_dev.c b/fs/block_dev.c
index b3171fb..50e8c85 100644 (file)
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -172,9 +172,8 @@ blkdev_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov,
        struct file *file = iocb->ki_filp;
        struct inode *inode = file->f_mapping->host;
 
-       return blockdev_direct_IO_no_locking_newtrunc(rw, iocb, inode,
-                               I_BDEV(inode), iov, offset, nr_segs,
-                               blkdev_get_blocks, NULL);
+       return __blockdev_direct_IO(rw, iocb, inode, I_BDEV(inode), iov, offset,
+                                   nr_segs, blkdev_get_blocks, NULL, NULL, 0);
 }
 
 int __sync_blockdev(struct block_device *bdev, int wait)
@@ -309,9 +308,8 @@ static int blkdev_write_begin(struct file *file, struct address_space *mapping,
                        loff_t pos, unsigned len, unsigned flags,
                        struct page **pagep, void **fsdata)
 {
-       *pagep = NULL;
-       return block_write_begin_newtrunc(file, mapping, pos, len, flags,
-                               pagep, fsdata, blkdev_get_block);
+       return block_write_begin(mapping, pos, len, flags, pagep,
+                                blkdev_get_block);
 }
 
 static int blkdev_write_end(struct file *file, struct address_space *mapping,
@@ -428,10 +426,13 @@ static inline void __bd_forget(struct inode *inode)
        inode->i_mapping = &inode->i_data;
 }
 
-static void bdev_clear_inode(struct inode *inode)
+static void bdev_evict_inode(struct inode *inode)
 {
        struct block_device *bdev = &BDEV_I(inode)->bdev;
        struct list_head *p;
+       truncate_inode_pages(&inode->i_data, 0);
+       invalidate_inode_buffers(inode); /* is it needed here? */
+       end_writeback(inode);
        spin_lock(&bdev_lock);
        while ( (p = bdev->bd_inodes.next) != &bdev->bd_inodes ) {
                __bd_forget(list_entry(p, struct inode, i_devices));
@@ -445,7 +446,7 @@ static const struct super_operations bdev_sops = {
        .alloc_inode = bdev_alloc_inode,
        .destroy_inode = bdev_destroy_inode,
        .drop_inode = generic_delete_inode,
-       .clear_inode = bdev_clear_inode,
+       .evict_inode = bdev_evict_inode,
 };
 
 static int bd_get_sb(struct file_system_type *fs_type,
@@ -1339,19 +1340,20 @@ static int __blkdev_get(struct block_device *bdev, fmode_t mode, int for_part)
        /*
         * hooks: /n/, see "layering violations".
         */
-       ret = devcgroup_inode_permission(bdev->bd_inode, perm);
-       if (ret != 0) {
-               bdput(bdev);
-               return ret;
+       if (!for_part) {
+               ret = devcgroup_inode_permission(bdev->bd_inode, perm);
+               if (ret != 0) {
+                       bdput(bdev);
+                       return ret;
+               }
        }
 
-       lock_kernel();
  restart:
 
        ret = -ENXIO;
        disk = get_gendisk(bdev->bd_dev, &partno);
        if (!disk)
-               goto out_unlock_kernel;
+               goto out;
 
        mutex_lock_nested(&bdev->bd_mutex, for_part);
        if (!bdev->bd_openers) {
@@ -1431,7 +1433,6 @@ static int __blkdev_get(struct block_device *bdev, fmode_t mode, int for_part)
        if (for_part)
                bdev->bd_part_count++;
        mutex_unlock(&bdev->bd_mutex);
-       unlock_kernel();
        return 0;
 
  out_clear:
@@ -1444,9 +1445,7 @@ static int __blkdev_get(struct block_device *bdev, fmode_t mode, int for_part)
        bdev->bd_contains = NULL;
  out_unlock_bdev:
        mutex_unlock(&bdev->bd_mutex);
- out_unlock_kernel:
-       unlock_kernel();
-
+ out:
        if (disk)
                module_put(disk->fops->owner);
        put_disk(disk);
@@ -1515,7 +1514,6 @@ static int __blkdev_put(struct block_device *bdev, fmode_t mode, int for_part)
        struct block_device *victim = NULL;
 
        mutex_lock_nested(&bdev->bd_mutex, for_part);
-       lock_kernel();
        if (for_part)
                bdev->bd_part_count--;
 
@@ -1540,7 +1538,6 @@ static int __blkdev_put(struct block_device *bdev, fmode_t mode, int for_part)
                        victim = bdev->bd_contains;
                bdev->bd_contains = NULL;
        }
-       unlock_kernel();
        mutex_unlock(&bdev->bd_mutex);
        bdput(bdev);
        if (victim)