linux-kernel - Re: [PATCH v2] mlxsw: fix warnings for big-endian 32-bit dma_addr

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Date:	Thu, 08 Oct 2015 05:07:19 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	arnd@...db.de
Cc:	joe@...ches.com, netdev@...r.kernel.org, jiri@...lanox.com,
	idosch@...lanox.com, linux-kernel@...r.kernel.org,
	eladr@...lanox.com, sfeldma@...il.com,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2] mlxsw: fix warnings for big-endian 32-bit dma_addr_t

From: Arnd Bergmann <arnd@...db.de>
Date: Wed, 07 Oct 2015 08:58:34 +0200

> The recently added mlxsw driver produces warnings in ARM
> allmodconfig:
> 
> drivers/net/ethernet/mellanox/mlxsw/pci.c: In function 'mlxsw_pci_cmd_exec':
> drivers/net/ethernet/mellanox/mlxsw/pci.c:1585:59: warning: right shift count >= width of type [-Wshift-count-overflow]
> linux/byteorder/big_endian.h:38:51: note: in definition of macro '__cpu_to_be32'
> drivers/net/ethernet/mellanox/mlxsw/pci.c:76:2: note: in expansion of macro 'iowrite32be'
> 
> This uses upper_32_bits() to extract the bits while avoiding that warning.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> Acked-by: Jiri Pirko <jiri@...lanox.com>
> Fixes: eda6500a987a "mlxsw: Add PCI bus implementation"

Applied, thanks.
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