net/hyperv: Remove unnecessary kmap_atomic in netvsc driver

__get_free_pages() doesn't return HI memory, so the memory is always mapped.
kmap_atomic() is not necessary here. This patch removes the kmap_atomic()
calls and related code for locking and page manipulation.

Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 2 insertions, 4 deletions

diff --git a/drivers/net/hyperv/hyperv_net.h b/drivers/net/hyperv/hyperv_net.h
index 49b131f71d7a..ff1b5209b45f 100644
--- a/drivers/net/hyperv/hyperv_net.h
+++ b/drivers/net/hyperv/hyperv_net.h
@@ -39,9 +39,6 @@ struct xferpage_packet {
         u32 count;
 };
 
-/* The number of pages which are enough to cover jumbo frame buffer. */
-#define NETVSC_PACKET_MAXPAGE           4
-
 /*
  * Represent netvsc packet which contains 1 RNDIS and 1 ethernet frame
  * within the RNDIS
@@ -77,8 +74,9 @@ struct hv_netvsc_packet {
 
         u32 total_data_buflen;
         /* Points to the send/receive buffer where the ethernet frame is */
+        void *data;
         u32 page_buf_cnt;
-        struct hv_page_buffer page_buf[NETVSC_PACKET_MAXPAGE];
+        struct hv_page_buffer page_buf[0];
 };
 
 struct netvsc_device_info {