Re: [PATCH] bio: Make the test correct for idx in __bio_clone_fast
From: Minfei Huang
Date: Mon Jan 18 2016 - 08:00:36 EST
Any comment is appreciate.
On 12/19/15 at 01:09P, Minfei Huang wrote:
> It is more lucky that kernel crash does not happen, since we test the
> bi_pool in function __bio_clone_fast.
> The idx will be still equal to BIO_POOL_NONE, if there is no bvec to be
> Fix the bug_on condition to make the test correct.
> Signed-off-by: Minfei Huang <mnfhuang@xxxxxxxxx>
> block/bio.c | 3 +--
> 1 file changed, 1 insertion(+), 2 deletions(-)
> diff --git a/block/bio.c b/block/bio.c
> index 4f184d9..041ece0 100644
> --- a/block/bio.c
> +++ b/block/bio.c
> @@ -573,8 +573,7 @@ EXPORT_SYMBOL(bio_phys_segments);
> void __bio_clone_fast(struct bio *bio, struct bio *bio_src)
> - BUG_ON(bio->bi_pool && BIO_POOL_IDX(bio) != BIO_POOL_NONE);
> + BUG_ON(BIO_POOL_IDX(bio) != BIO_POOL_NONE);
> * most users will be overriding ->bi_bdev with a new target,
> * so we don't set nor calculate new physical/hw segment counts here