linux-kernel - [PATCH] dpaa2-eth: debugfs: use div64

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Message-Id: <20200429084740.2665893-1-arnd@arndb.de>
Date:   Wed, 29 Apr 2020 10:47:22 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Ioana Ciornei <ioana.ciornei@....com>,
        Ioana Radulescu <ruxandra.radulescu@....com>,
        "David S. Miller" <davem@...emloft.net>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] dpaa2-eth: debugfs: use div64_u64 for division

A plain 64-bit division breaks building on 32-bit architectures:

ERROR: modpost: "__aeabi_uldivmod" [drivers/net/ethernet/freescale/dpaa2/fsl-dpaa2-eth.ko] undefined!

As this function is not performance critical, just use the external
helper instead.

Fixes: 460fd830dd9d ("dpaa2-eth: add channel stat to debugfs")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/net/ethernet/freescale/dpaa2/dpaa2-eth-debugfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth-debugfs.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth-debugfs.c
index 80291afff3ea..0a31e4268dfb 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth-debugfs.c
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth-debugfs.c
@@ -139,7 +139,7 @@ static int dpaa2_dbg_ch_show(struct seq_file *file, void *offset)
 			   ch->stats.dequeue_portal_busy,
 			   ch->stats.frames,
 			   ch->stats.cdan,
-			   ch->stats.frames / ch->stats.cdan,
+			   div64_u64(ch->stats.frames, ch->stats.cdan),
 			   ch->buf_count);
 	}
 
-- 
2.26.0