[PATCH 5.2 282/413] bcache: Revert "bcache: free heap cache_set->flush_btree in bch_journal_free"

[Greg Kroah-Hartman]

From: Coly Li <colyli@xxxxxxx>

commit ba82c1ac1667d6efb91a268edb13fc9cdaecec9b upstream.

This reverts commit 6268dc2c4703aabfb0b35681be709acf4c2826c6.

This patch depends on commit c4dc2497d50d ("bcache: fix high CPU
occupancy during journal") which is reverted in previous patch. So
revert this one too.

Fixes: 6268dc2c4703 ("bcache: free heap cache_set->flush_btree in bch_journal_free")
Signed-off-by: Coly Li <colyli@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Cc: Shenghui Wang <shhuiw@xxxxxxxxxxx>
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/md/bcache/journal.c |    1 -
 1 file changed, 1 deletion(-)

--- a/drivers/md/bcache/journal.c
+++ b/drivers/md/bcache/journal.c
@@ -843,7 +843,6 @@ void bch_journal_free(struct cache_set *
 	free_pages((unsigned long) c->journal.w[1].data, JSET_BITS);
 	free_pages((unsigned long) c->journal.w[0].data, JSET_BITS);
 	free_fifo(&c->journal.pin);
-	free_heap(&c->flush_btree);
 }
 
 int bch_journal_alloc(struct cache_set *c)