netdev - [PATCH v2] net/ena: Fix build warning in ena_xdp

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Message-Id: <20200428044945.123511-1-gshan@redhat.com>
Date:   Tue, 28 Apr 2020 14:49:45 +1000
From:   Gavin Shan <gshan@...hat.com>
To:     netdev@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, netanel@...zon.com,
        akiyano@...zon.com, gtzalik@...zon.com, davem@...emloft.net,
        gshan@...hat.com, shan.gavin@...il.com
Subject: [PATCH v2] net/ena: Fix build warning in ena_xdp_set()

This fixes the following build warning in ena_xdp_set(), which is
observed on aarch64 with 64KB page size.

   In file included from ./include/net/inet_sock.h:19,
      from ./include/net/ip.h:27,
      from drivers/net/ethernet/amazon/ena/ena_netdev.c:46:
   drivers/net/ethernet/amazon/ena/ena_netdev.c: In function         \
   ‘ena_xdp_set’:                                                    \
   drivers/net/ethernet/amazon/ena/ena_netdev.c:557:6: warning:      \
   format ‘%lu’                                                      \
   expects argument of type ‘long unsigned int’, but argument 4      \
   has type ‘int’                                                    \
   [-Wformat=] "Failed to set xdp program, the current MTU (%d) is   \
   larger than the maximum allowed MTU (%lu) while xdp is on",

Signed-off-by: Gavin Shan <gshan@...hat.com>
---
v2: Make ENA_PAGE_SIZE to be "unsigned long" and verify on aarch64
    with 4KB or 64KB page size configuration
---
 drivers/net/ethernet/amazon/ena/ena_netdev.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.h b/drivers/net/ethernet/amazon/ena/ena_netdev.h
index 97dfd0c67e84..9e1860d81908 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.h
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.h
@@ -69,7 +69,7 @@
  * 16kB.
  */
 #if PAGE_SIZE > SZ_16K
-#define ENA_PAGE_SIZE SZ_16K
+#define ENA_PAGE_SIZE (_AC(SZ_16K, UL))
 #else
 #define ENA_PAGE_SIZE PAGE_SIZE
 #endif
-- 
2.23.0