From: Jens Axboe <axboe@xxxxxxxxx>
commit 11eb695feb636fa5211067189cad25ac073e7fe5 upstream.
This isn't strictly needed in terms of correctness, but it does allow
polling to know if the bio has been put already by a different task
and hence avoid polling something that we don't need to.
Cc: stable@xxxxxxxxxxxxxxx
Fixes: be4d234d7aeb ("bio: add allocation cache abstraction")
Reviewed-by: Keith Busch <kbusch@xxxxxxxxxx>
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
block/bio.c | 1 +
1 file changed, 1 insertion(+)
--- a/block/bio.c
+++ b/block/bio.c
@@ -747,6 +747,7 @@ void bio_put(struct bio *bio)
bio_uninit(bio);
cache = per_cpu_ptr(bio->bi_pool->cache, get_cpu());
bio->bi_next = cache->free_list;
+ bio->bi_bdev = NULL;
cache->free_list = bio;
if (++cache->nr > ALLOC_CACHE_MAX + ALLOC_CACHE_SLACK)
bio_alloc_cache_prune(cache, ALLOC_CACHE_SLACK);
