fs: Add helper to clean bdev aliases under a bh and use it
Add a helper function that clears buffer heads from a block device
aliasing passed bh. Use this helper function from filesystems instead of
the original unmap_underlying_metadata() to save some boiler plate code
and also have a better name for the functionalily since it is not
unmapping anything for a *long* time.
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/fs/ntfs/file.c b/fs/ntfs/file.c
index bf72a2c..99510d8 100644
--- a/fs/ntfs/file.c
+++ b/fs/ntfs/file.c
@@ -740,8 +740,7 @@ static int ntfs_prepare_pages_for_non_resident_write(struct page **pages,
set_buffer_uptodate(bh);
if (unlikely(was_hole)) {
/* We allocated the buffer. */
- unmap_underlying_metadata(bh->b_bdev,
- bh->b_blocknr);
+ clean_bdev_bh_alias(bh);
if (bh_end <= pos || bh_pos >= end)
mark_buffer_dirty(bh);
else
@@ -784,7 +783,7 @@ static int ntfs_prepare_pages_for_non_resident_write(struct page **pages,
continue;
}
/* We allocated the buffer. */
- unmap_underlying_metadata(bh->b_bdev, bh->b_blocknr);
+ clean_bdev_bh_alias(bh);
/*
* If the buffer is fully outside the write, zero it,
* set it uptodate, and mark it dirty so it gets
