On Thu, Jan 07, 2016 at 11:02:34AM +1100, NeilBrown wrote:
> 
> These async_XX functions are called from md/raid5 in an atomic
> section, between get_cpu() and put_cpu(), so they must not sleep.
> So use GFP_NOWAIT rather than GFP_IO.
> 
> Dan Williams writes: Longer term async_tx needs to be merged into md
> directly as we can allocate this unmap data statically per-stripe
> rather than per request.
> 
> Fixed: 7476bd79fc01 ("async_pq: convert to dmaengine_unmap_data")
> Cc: stable@vger.kernel.org (v3.13+)
> Reported-and-tested-by: Stanislav Samsonov <slava@annapurnalabs.com>
> Acked-by: Dan Williams <dan.j.williams@intel.com>
> Signed-off-by: NeilBrown <neilb@suse.com>
> ---
> 
> Thanks for taking this Vinod.
> It is currently in linux-next from my md tree, but I've just de-staged
> it so the next linux-next won't have it from me.

Okay this is not in dmaengine. But since we all agreed, I have picked and
will send to Linus later today. If anyone has any objections please speak up

Thanks
-- 
~Vinod