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rbd: make snap_size order parameter optional 

Only one of the two callers of _rbd_dev_v2_snap_size() needs the
order value returned.  So make that an optional argument--a null
pointer if the caller doesn't need it.

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
This commit is contained in:
Alex Elder 2013-04-25 15:09:41 -05:00 committed by Sage Weil
parent 522a0cc0f0
commit c86f86e9e7
1 changed files with 3 additions and 3 deletions
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6
drivers/block/rbd.c
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@ -3494,7 +3494,8 @@ static int _rbd_dev_v2_snap_size(struct rbd_device *rbd_dev, u64 snap_id,
if (ret < sizeof (size_buf))
return -ERANGE;
*order = size_buf.order;
if (order)
*order = size_buf.order;
*snap_size = le64_to_cpu(size_buf.size);
dout(" snap_id 0x%016llx order = %u, snap_size = %llu\n",
@ -3939,11 +3940,10 @@ static char *rbd_dev_v2_snap_info(struct rbd_device *rbd_dev, u32 which,
u64 *snap_size, u64 *snap_features)
{
u64 snap_id;
u8 order;
int ret;
snap_id = rbd_dev->header.snapc->snaps[which];
ret = _rbd_dev_v2_snap_size(rbd_dev, snap_id, &order, snap_size);
ret = _rbd_dev_v2_snap_size(rbd_dev, snap_id, NULL, snap_size);
if (ret)
return ERR_PTR(ret);
ret = _rbd_dev_v2_snap_features(rbd_dev, snap_id, snap_features);