[PATCH RFC PKS/PMEM 07/58] drivers/drbd: Utilize new kmap_thread()

[ira.weiny@xxxxxxxxx]

From: Ira Weiny <ira.weiny@xxxxxxxxx>

The kmap() calls in this driver are localized to a single thread.  To
avoid the over head of global PKRS updates use the new kmap_thread()
call.

Cc: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Ira Weiny <ira.weiny@xxxxxxxxx>
---
 drivers/block/drbd/drbd_main.c     |  4 ++--
 drivers/block/drbd/drbd_receiver.c | 12 ++++++------
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index 573dbf6f0c31..f0d0c6b0745e 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -1532,9 +1532,9 @@ static int _drbd_no_send_page(struct drbd_peer_device 
*peer_device, struct page
        int err;
 
        socket = peer_device->connection->data.socket;
-       addr = kmap(page) + offset;
+       addr = kmap_thread(page) + offset;
        err = drbd_send_all(peer_device->connection, socket, addr, size, 
msg_flags);
-       kunmap(page);
+       kunmap_thread(page);
        if (!err)
                peer_device->device->send_cnt += size >> 9;
        return err;
diff --git a/drivers/block/drbd/drbd_receiver.c 
b/drivers/block/drbd/drbd_receiver.c
index 422363daa618..4704bc0564e2 100644
--- a/drivers/block/drbd/drbd_receiver.c
+++ b/drivers/block/drbd/drbd_receiver.c
@@ -1951,13 +1951,13 @@ read_in_block(struct drbd_peer_device *peer_device, u64 
id, sector_t sector,
        page = peer_req->pages;
        page_chain_for_each(page) {
                unsigned len = min_t(int, ds, PAGE_SIZE);
-               data = kmap(page);
+               data = kmap_thread(page);
                err = drbd_recv_all_warn(peer_device->connection, data, len);
                if (drbd_insert_fault(device, DRBD_FAULT_RECEIVE)) {
                        drbd_err(device, "Fault injection: Corrupting data on 
receive\n");
                        data[0] = data[0] ^ (unsigned long)-1;
                }
-               kunmap(page);
+               kunmap_thread(page);
                if (err) {
                        drbd_free_peer_req(device, peer_req);
                        return NULL;
@@ -1992,7 +1992,7 @@ static int drbd_drain_block(struct drbd_peer_device 
*peer_device, int data_size)
 
        page = drbd_alloc_pages(peer_device, 1, 1);
 
-       data = kmap(page);
+       data = kmap_thread(page);
        while (data_size) {
                unsigned int len = min_t(int, data_size, PAGE_SIZE);
 
@@ -2001,7 +2001,7 @@ static int drbd_drain_block(struct drbd_peer_device 
*peer_device, int data_size)
                        break;
                data_size -= len;
        }
-       kunmap(page);
+       kunmap_thread(page);
        drbd_free_pages(peer_device->device, page, 0);
        return err;
 }
@@ -2033,10 +2033,10 @@ static int recv_dless_read(struct drbd_peer_device 
*peer_device, struct drbd_req
        D_ASSERT(peer_device->device, sector == bio->bi_iter.bi_sector);
 
        bio_for_each_segment(bvec, bio, iter) {
-               void *mapped = kmap(bvec.bv_page) + bvec.bv_offset;
+               void *mapped = kmap_thread(bvec.bv_page) + bvec.bv_offset;
                expect = min_t(int, data_size, bvec.bv_len);
                err = drbd_recv_all_warn(peer_device->connection, mapped, 
expect);
-               kunmap(bvec.bv_page);
+               kunmap_thread(bvec.bv_page);
                if (err)
                        return err;
                data_size -= expect;
-- 
2.28.0.rc0.12.gb6a658bd00c9