diff options
| author | NeilBrown <neilb@suse.com> | 2016-01-07 03:02:34 +0300 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2016-01-07 08:36:18 +0300 |
| commit | b02bab6b0f928d49dbfb03e1e4e9dd43647623d7 (patch) | |
| tree | 1d7648d55adc0d47d6da533f7a96a70aa9cf8ec8 /crypto/async_tx/async_pq.c | |
| parent | 16605e8d50898ac88b5b504a7fbd63ecdcf37702 (diff) | |
| download | linux-b02bab6b0f928d49dbfb03e1e4e9dd43647623d7.tar.xz | |
async_tx: use GFP_NOWAIT rather than GFP_IO
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>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'crypto/async_tx/async_pq.c')
| -rw-r--r-- | crypto/async_tx/async_pq.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/crypto/async_tx/async_pq.c b/crypto/async_tx/async_pq.c index 5d355e0c2633..c0748bbd4c08 100644 --- a/crypto/async_tx/async_pq.c +++ b/crypto/async_tx/async_pq.c @@ -188,7 +188,7 @@ async_gen_syndrome(struct page **blocks, unsigned int offset, int disks, BUG_ON(disks > 255 || !(P(blocks, disks) || Q(blocks, disks))); if (device) - unmap = dmaengine_get_unmap_data(device->dev, disks, GFP_NOIO); + unmap = dmaengine_get_unmap_data(device->dev, disks, GFP_NOWAIT); /* XORing P/Q is only implemented in software */ if (unmap && !(submit->flags & ASYNC_TX_PQ_XOR_DST) && @@ -307,7 +307,7 @@ async_syndrome_val(struct page **blocks, unsigned int offset, int disks, BUG_ON(disks < 4); if (device) - unmap = dmaengine_get_unmap_data(device->dev, disks, GFP_NOIO); + unmap = dmaengine_get_unmap_data(device->dev, disks, GFP_NOWAIT); if (unmap && disks <= dma_maxpq(device, 0) && is_dma_pq_aligned(device, offset, 0, len)) { |