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| author | Chuck Lever <chuck.lever@oracle.com> | 2017-08-14 15:38:30 -0400 |
|---|---|---|
| committer | Anna Schumaker <Anna.Schumaker@Netapp.com> | 2017-08-15 14:01:50 -0400 |
| commit | 6748b0caf82101f1f01208e48f5c4fd3ce76d562 (patch) | |
| tree | 3d4a42e2a3448db7d4e82eb1237540e8c5cd0712 /net/sunrpc/xprtrdma/fmr_ops.c | |
| parent | 28d9d56f4c7759e1f12e5b1bff60210082812edc (diff) | |
| download | talos-op-linux-6748b0caf82101f1f01208e48f5c4fd3ce76d562.tar.gz talos-op-linux-6748b0caf82101f1f01208e48f5c4fd3ce76d562.zip | |
xprtrdma: Remove imul instructions from chunk list encoders
Re-arrange the pointer arithmetic in the chunk list encoders to
eliminate several more integer multiplication instructions during
Transport Header encoding.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'net/sunrpc/xprtrdma/fmr_ops.c')
| -rw-r--r-- | net/sunrpc/xprtrdma/fmr_ops.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/net/sunrpc/xprtrdma/fmr_ops.c b/net/sunrpc/xprtrdma/fmr_ops.c index d3f84bb1d443..6c7151341194 100644 --- a/net/sunrpc/xprtrdma/fmr_ops.c +++ b/net/sunrpc/xprtrdma/fmr_ops.c @@ -177,7 +177,7 @@ fmr_op_maxpages(struct rpcrdma_xprt *r_xprt) /* Use the ib_map_phys_fmr() verb to register a memory region * for remote access via RDMA READ or RDMA WRITE. */ -static int +static struct rpcrdma_mr_seg * fmr_op_map(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg, int nsegs, bool writing, struct rpcrdma_mw **out) { @@ -188,7 +188,7 @@ fmr_op_map(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg, mw = rpcrdma_get_mw(r_xprt); if (!mw) - return -ENOBUFS; + return ERR_PTR(-ENOBUFS); pageoff = offset_in_page(seg1->mr_offset); seg1->mr_offset -= pageoff; /* start of page */ @@ -232,13 +232,13 @@ fmr_op_map(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg, mw->mw_offset = dma_pages[0] + pageoff; *out = mw; - return mw->mw_nents; + return seg; out_dmamap_err: pr_err("rpcrdma: failed to DMA map sg %p sg_nents %d\n", mw->mw_sg, i); rpcrdma_put_mw(r_xprt, mw); - return -EIO; + return ERR_PTR(-EIO); out_maperr: pr_err("rpcrdma: ib_map_phys_fmr %u@0x%llx+%i (%d) status %i\n", @@ -247,7 +247,7 @@ out_maperr: ib_dma_unmap_sg(r_xprt->rx_ia.ri_device, mw->mw_sg, mw->mw_nents, mw->mw_dir); rpcrdma_put_mw(r_xprt, mw); - return -EIO; + return ERR_PTR(-EIO); } /* Invalidate all memory regions that were registered for "req". |
