Herbert Xu <[email protected]> writes:
> --
> diff --git a/fs/buffer.c b/fs/buffer.c
> index 71649ef..b998f08 100644
> --- a/fs/buffer.c
> +++ b/fs/buffer.c
> @@ -2790,6 +2790,7 @@ int submit_bh(int rw, struct buffer_head
> BUG_ON(!buffer_locked(bh));
> BUG_ON(!buffer_mapped(bh));
> BUG_ON(!bh->b_end_io);
> + WARN_ON(bh_offset(bh) + bh->b_size > PAGE_SIZE);
What happens when someone implements direct large page IO?
-Andi
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