From: Pavel Begunkov <asml.silence@xxxxxxxxx> [ Upstream commit d4347d50407daea6237872281ece64c4bdf1ec99 ] bio_put() with REQ_ALLOC_CACHE assumes that it's executed not from an irq context. Let's add a warning if the invariant is not respected, especially since there is a couple of places removing REQ_POLLED by hand without also clearing REQ_ALLOC_CACHE. Signed-off-by: Pavel Begunkov <asml.silence@xxxxxxxxx> Reviewed-by: Christoph Hellwig <hch@xxxxxx> Link: https://lore.kernel.org/r/558d78313476c4e9c233902efa0092644c3d420a.1666122465.git.asml.silence@xxxxxxxxx Signed-off-by: Jens Axboe <axboe@xxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- block/bio.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/block/bio.c b/block/bio.c index 77e3b764a078..fc2364cf1775 100644 --- a/block/bio.c +++ b/block/bio.c @@ -741,7 +741,7 @@ void bio_put(struct bio *bio) return; } - if (bio->bi_opf & REQ_ALLOC_CACHE) { + if ((bio->bi_opf & REQ_ALLOC_CACHE) && !WARN_ON_ONCE(in_interrupt())) { struct bio_alloc_cache *cache; bio_uninit(bio); -- 2.35.1
