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fs: Add helper to clean bdev aliases under a bh and use it

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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 <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Jan Kara 2016-11-04 18:08:15 +01:00 • committed by Jens Axboe
commit e64855c6cf
10 changed files with 16 additions and 19 deletions
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3
fs/ufs/balloc.c
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@ -307,8 +307,7 @@ static void ufs_change_blocknr(struct inode *inode, sector_t beg,
(unsigned long long)(pos + newb), pos);
bh->b_blocknr = newb + pos;
unmap_underlying_metadata(bh->b_bdev,
bh->b_blocknr);
clean_bdev_bh_alias(bh);
mark_buffer_dirty(bh);
++j;
bh = bh->b_this_page;

3
fs/ufs/inode.c
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@ -1070,8 +1070,7 @@ static int ufs_alloc_lastblock(struct inode *inode, loff_t size)
if (buffer_new(bh)) {
clear_buffer_new(bh);
unmap_underlying_metadata(bh->b_bdev,
bh->b_blocknr);
clean_bdev_bh_alias(bh);
/*
* we do not zeroize fragment, because of
* if it maped to hole, it already contains zeroes