ocfs2: speed up chain-list searching

Add short-circuit code to speed up searching

Link: https://lkml.kernel.org/r/[e-mail]
Signed-off-by: Heming Zhao <[e-mail]>
Reviewed-by: Joseph Qi <[e-mail]>
Cc: Changwei Ge <[e-mail]>
Cc: Gang He <[e-mail]>
Cc: Joel Becker <[e-mail]>
Cc: Jun Piao <[e-mail]>
Cc: Junxiao Bi <[e-mail]>
Cc: Mark Fasheh <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>

fs/ocfs2/suballoc.c

···
 	for (i = 0; i < le16_to_cpu(cl->cl_next_free_rec); i ++) {
 		if (i == victim)
 			continue;
-		if (!cl->cl_recs[i].c_free)
+		if (le32_to_cpu(cl->cl_recs[i].c_free) < bits_wanted)
 			continue;
 
 		ac->ac_chain = i;