diff options
| author | Max Reitz <mreitz@redhat.com> | 2015-12-18 16:04:25 +0100 |
|---|---|---|
| committer | Jeff Cody <jcody@redhat.com> | 2016-02-29 14:54:31 -0500 |
| commit | 939901dcd2093a5d6b40420314d1af8b185ec43c (patch) | |
| tree | de8fc5dce5d4a0b1615bd8972f0758c98127b31f /block/vhdx.c | |
| parent | b189346eb1784df95ed6fed610411dbf23d19e1f (diff) | |
vhdx: DIV_ROUND_UP() in vhdx_calc_bat_entries()
We have DIV_ROUND_UP(), so we can use it to produce more easily readable
code. It may be slower than the bit shifting currently performed
(because it actually performs a division), but since
vhdx_calc_bat_entries() is never used in a hot path, this is completely
fine.
Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-id: 1450451066-13335-2-git-send-email-mreitz@redhat.com
Signed-off-by: Jeff Cody <jcody@redhat.com>
Diffstat (limited to 'block/vhdx.c')
| -rw-r--r-- | block/vhdx.c | 10 |
1 files changed, 2 insertions, 8 deletions
diff --git a/block/vhdx.c b/block/vhdx.c index 72042e9082..1e7e03ebed 100644 --- a/block/vhdx.c +++ b/block/vhdx.c @@ -857,14 +857,8 @@ static void vhdx_calc_bat_entries(BDRVVHDXState *s) { uint32_t data_blocks_cnt, bitmap_blocks_cnt; - data_blocks_cnt = s->virtual_disk_size >> s->block_size_bits; - if (s->virtual_disk_size - (data_blocks_cnt << s->block_size_bits)) { - data_blocks_cnt++; - } - bitmap_blocks_cnt = data_blocks_cnt >> s->chunk_ratio_bits; - if (data_blocks_cnt - (bitmap_blocks_cnt << s->chunk_ratio_bits)) { - bitmap_blocks_cnt++; - } + data_blocks_cnt = DIV_ROUND_UP(s->virtual_disk_size, s->block_size); + bitmap_blocks_cnt = DIV_ROUND_UP(data_blocks_cnt, s->chunk_ratio); if (s->parent_entries) { s->bat_entries = bitmap_blocks_cnt * (s->chunk_ratio + 1); |