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gfs2: Clean up ail2_empty 

Clean up the logic in ail2_empty (no functional change).

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
This commit is contained in:
Andreas Gruenbacher 2020-12-11 14:45:23 +01:00
parent e7501bf88c
commit 6e80674af0
1 changed files with 21 additions and 17 deletions
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38
fs/gfs2/log.c
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@ -367,29 +367,33 @@ static void gfs2_ail_empty_tr(struct gfs2_sbd *sdp, struct gfs2_trans *tr,
}
}
static void __ail2_empty(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
{
gfs2_ail_empty_tr(sdp, tr, &tr->tr_ail2_list);
list_del(&tr->tr_list);
gfs2_assert_warn(sdp, list_empty(&tr->tr_ail1_list));
gfs2_assert_warn(sdp, list_empty(&tr->tr_ail2_list));
gfs2_trans_free(sdp, tr);
}
static void ail2_empty(struct gfs2_sbd *sdp, unsigned int new_tail)
{
struct gfs2_trans *tr, *safe;
struct list_head *ail2_list = &sdp->sd_ail2_list;
unsigned int old_tail = sdp->sd_log_tail;
int wrap = (new_tail < old_tail);
int a, b, rm;
struct gfs2_trans *tr, *safe;
spin_lock(&sdp->sd_ail_lock);
list_for_each_entry_safe(tr, safe, &sdp->sd_ail2_list, tr_list) {
a = (old_tail <= tr->tr_first);
b = (tr->tr_first < new_tail);
rm = (wrap) ? (a || b) : (a && b);
if (!rm)
continue;
gfs2_ail_empty_tr(sdp, tr, &tr->tr_ail2_list);
list_del(&tr->tr_list);
gfs2_assert_warn(sdp, list_empty(&tr->tr_ail1_list));
gfs2_assert_warn(sdp, list_empty(&tr->tr_ail2_list));
gfs2_trans_free(sdp, tr);
if (old_tail <= new_tail) {
list_for_each_entry_safe(tr, safe, ail2_list, tr_list) {
if (old_tail <= tr->tr_first && tr->tr_first < new_tail)
__ail2_empty(sdp, tr);
}
} else {
list_for_each_entry_safe(tr, safe, ail2_list, tr_list) {
if (old_tail <= tr->tr_first || tr->tr_first < new_tail)
__ail2_empty(sdp, tr);
}
}
spin_unlock(&sdp->sd_ail_lock);
}