md/raid5-ppl: Drop unused argument from ppl_handle_flush_request()

ppl_handle_flush_request() takes an struct r5log argument but doesn't
use it. It has no buisiness taking this argument as it is only used
by raid5-cache and has no way to derference it anyway. Remove
the argument.

No functional changes intended.

Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

drivers/md/raid5-log.h

@@ -41,7 +41,7 @@ void ppl_write_stripe_run(struct r5conf *conf);
 void ppl_stripe_write_finished(struct stripe_head *sh);
 int ppl_modify_log(struct r5conf *conf, struct md_rdev *rdev, bool add);
 void ppl_quiesce(struct r5conf *conf, int quiesce);
-int ppl_handle_flush_request(struct r5l_log *log, struct bio *bio);
+int ppl_handle_flush_request(struct bio *bio);
 extern struct md_sysfs_entry ppl_write_hint;
 
 static inline bool raid5_has_log(struct r5conf *conf)
@@ -108,7 +108,7 @@ static inline int log_handle_flush_request(struct r5conf *conf, struct bio *bio)
 	if (conf->log)
 		ret = r5l_handle_flush_request(conf->log, bio);
 	else if (raid5_has_ppl(conf))
-		ret = ppl_handle_flush_request(conf->log, bio);
+		ret = ppl_handle_flush_request(bio);
 
 	return ret;
 }

drivers/md/raid5-ppl.c

@@ -679,7 +679,7 @@ void ppl_quiesce(struct r5conf *conf, int quiesce)
 	}
 }
 
-int ppl_handle_flush_request(struct r5l_log *log, struct bio *bio)
+int ppl_handle_flush_request(struct bio *bio)
 {
 	if (bio->bi_iter.bi_size == 0) {
 		bio_endio(bio);