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Subject[PATCH review 30/85] gfs2: Introduce qd2index
From: "Eric W. Biederman" <ebiederm@xmission.com>

Both qd_alloc and qd2offset perform the exact same computation
to get an index from a gfs2_quota_data. Make life a little
simpler and factor out this index computation.

Cc: Steven Whitehouse <swhiteho@redhat.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
---
fs/gfs2/quota.c | 10 ++++++++--
1 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c
index f8279ee..0e7c982 100644
--- a/fs/gfs2/quota.c
+++ b/fs/gfs2/quota.c
@@ -120,11 +120,17 @@ out:
return (atomic_read(&qd_lru_count) * sysctl_vfs_cache_pressure) / 100;
}

+static u64 qd2index(struct gfs2_quota_data *qd)
+{
+ return (2 * (u64)qd->qd_id) +
+ test_bit(QDF_USER, &qd->qd_flags) ? 0 : 1;
+}
+
static u64 qd2offset(struct gfs2_quota_data *qd)
{
u64 offset;

- offset = 2 * (u64)qd->qd_id + !test_bit(QDF_USER, &qd->qd_flags);
+ offset = qd2index(qd);
offset *= sizeof(struct gfs2_quota);

return offset;
@@ -147,7 +153,7 @@ static int qd_alloc(struct gfs2_sbd *sdp, int user, u32 id,
qd->qd_slot = -1;
INIT_LIST_HEAD(&qd->qd_reclaim);

- error = gfs2_glock_get(sdp, 2 * (u64)id + !user,
+ error = gfs2_glock_get(sdp, qd2index(qd),
&gfs2_quota_glops, CREATE, &qd->qd_gl);
if (error)
goto fail;
--
1.7.5.4


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