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ext4: use iomap for zeroing blocks in DAX mode

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Use iomap infrastructure for zeroing blocks when in DAX mode.
ext4_iomap_begin() handles read requests just fine and that's all that
is needed for iomap_zero_range().

Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Jan Kara 2016-11-20 18:08:05 -05:00 committed by Theodore Ts'o
parent 364443cbcf
commit 47e6935136
1 changed files with 4 additions and 2 deletions
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6
fs/ext4/inode.c
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@ -3859,8 +3859,10 @@ static int ext4_block_zero_page_range(handle_t *handle,
if (length > max || length < 0)
length = max;
if (IS_DAX(inode))
return dax_zero_page_range(inode, from, length, ext4_get_block);
if (IS_DAX(inode)) {
return iomap_zero_range(inode, from, length, NULL,
&ext4_iomap_ops);
}
return __ext4_block_zero_page_range(handle, mapping, from, length);
}