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add releasepage hooks to block devices which can be used by file systems

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Implement blkdev_releasepage() to release the buffer_heads and pages
after we release private data belonging to a mounted filesystem.

Cc: Toshiyuki Okajima <toshi.okajima@jp.fujitsu.com>
Cc: linux-fsdevel@vger.kernel.org
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Theodore Ts'o
2009-01-03 09:47:09 -05:00
parent 0087d9fb3f
commit 87d8fe1ee6
3 changed files with 19 additions and 0 deletions
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2
fs/super.c
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@@ -800,6 +800,7 @@ int get_sb_bdev(struct file_system_type *fs_type,
}
s->s_flags |= MS_ACTIVE;
bdev->bd_super = s;
}
return simple_set_mnt(mnt, s);
@@ -819,6 +820,7 @@ void kill_block_super(struct super_block *sb)
struct block_device *bdev = sb->s_bdev;
fmode_t mode = sb->s_mode;
bdev->bd_super = 0;
generic_shutdown_super(sb);
sync_blockdev(bdev);
close_bdev_exclusive(bdev, mode);