add releasepage hooks to block devices which can be used by file systems
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>
diff --git a/fs/super.c b/fs/super.c
index ddba069..d5fd449 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -800,6 +800,7 @@
}
s->s_flags |= MS_ACTIVE;
+ bdev->bd_super = s;
}
return simple_set_mnt(mnt, s);
@@ -819,6 +820,7 @@
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);