RDMA/hfi1: Remove use of kmap()

kmap() is being deprecated and will break uses of device dax after PKS
protection is introduced.[1]

The kmap() used in sdma does not need to be global.  Use the new
kmap_local_page() which works with PKS and may provide better performance
for this thread local mapping anyway.

[1] https://lore.kernel.org/lkml/20201009195033.3208459-59-ira.weiny@intel.com/

Link: https://lore.kernel.org/r/20210622061422.2633501-2-ira.weiny@intel.com
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

diff --git a/drivers/infiniband/hw/hfi1/sdma.c b/drivers/infiniband/hw/hfi1/sdma.c
index 1fcc6e9..eb15c31 100644 (file)
--- a/drivers/infiniband/hw/hfi1/sdma.c
+++ b/drivers/infiniband/hw/hfi1/sdma.c
@@ -3130,7 +3130,7 @@ int ext_coal_sdma_tx_descs(struct hfi1_devdata *dd, struct sdma_txreq *tx,
                }
 
                if (type == SDMA_MAP_PAGE) {
-                       kvaddr = kmap(page);
+                       kvaddr = kmap_local_page(page);
                        kvaddr += offset;
                } else if (WARN_ON(!kvaddr)) {
                        __sdma_txclean(dd, tx);
@@ -3140,7 +3140,7 @@ int ext_coal_sdma_tx_descs(struct hfi1_devdata *dd, struct sdma_txreq *tx,
                memcpy(tx->coalesce_buf + tx->coalesce_idx, kvaddr, len);
                tx->coalesce_idx += len;
                if (type == SDMA_MAP_PAGE)
-                       kunmap(page);
+                       kunmap_local(kvaddr);
 
                /* If there is more data, return */
                if (tx->tlen - tx->coalesce_idx)