[PATCH v2 08/17] md/raid5-cache: Pass the log through to r5c_finish_cache_stripe()

[Logan Gunthorpe <logang@xxxxxxxxxxxx>]

r5c_finish_cache_stripe() dereferences conf->log, which will need an
rcu_read_lock(). But that is not necessary here as the log is already
available in the call sites through other means.

No functional changes intended.

Signed-off-by: Logan Gunthorpe <logang@xxxxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
---
 drivers/md/raid5-cache.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/drivers/md/raid5-cache.c b/drivers/md/raid5-cache.c
index 24110b687055..8284ce3e5cf6 100644
--- a/drivers/md/raid5-cache.c
+++ b/drivers/md/raid5-cache.c
@@ -507,10 +507,9 @@ static void r5c_handle_parity_cached(struct stripe_head *sh)
  * Setting proper flags after writing (or flushing) data and/or parity to the
  * log device. This is called from r5l_log_endio() or r5l_log_flush_endio().
  */
-static void r5c_finish_cache_stripe(struct stripe_head *sh)
+static void r5c_finish_cache_stripe(struct r5l_log *log,
+				    struct stripe_head *sh)
 {
-	struct r5l_log *log = sh->raid_conf->log;
-
 	if (log->r5c_journal_mode == R5C_JOURNAL_MODE_WRITE_THROUGH) {
 		BUG_ON(test_bit(STRIPE_R5C_CACHING, &sh->state));
 		/*
@@ -528,14 +527,14 @@ static void r5c_finish_cache_stripe(struct stripe_head *sh)
 	}
 }
 
-static void r5l_io_run_stripes(struct r5l_io_unit *io)
+static void r5l_io_run_stripes(struct r5l_log *log, struct r5l_io_unit *io)
 {
 	struct stripe_head *sh, *next;
 
 	list_for_each_entry_safe(sh, next, &io->stripe_list, log_list) {
 		list_del_init(&sh->log_list);
 
-		r5c_finish_cache_stripe(sh);
+		r5c_finish_cache_stripe(log, sh);
 
 		set_bit(STRIPE_HANDLE, &sh->state);
 		raid5_release_stripe(sh);
@@ -554,7 +553,7 @@ static void r5l_log_run_stripes(struct r5l_log *log)
 			break;
 
 		list_move_tail(&io->log_sibling, &log->finished_ios);
-		r5l_io_run_stripes(io);
+		r5l_io_run_stripes(log, io);
 	}
 }
 
@@ -1284,7 +1283,7 @@ static void r5l_log_flush_endio(struct bio *bio)
 
 	spin_lock_irqsave(&log->io_list_lock, flags);
 	list_for_each_entry(io, &log->flushing_ios, log_sibling)
-		r5l_io_run_stripes(io);
+		r5l_io_run_stripes(log, io);
 	list_splice_tail_init(&log->flushing_ios, &log->finished_ios);
 	spin_unlock_irqrestore(&log->io_list_lock, flags);
 
-- 
2.30.2