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gfs2: Introduce qd2index 

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>
This commit is contained in:
Eric W. Biederman 2013-01-31 18:33:38 -08:00
parent 558e85289f
commit 2f6c9896f7
1 changed files with 8 additions and 2 deletions
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10
fs/gfs2/quota.c
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@ -120,11 +120,17 @@ int gfs2_shrink_qd_memory(struct shrinker *shrink, struct shrink_control *sc)
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;