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

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Message-ID: <20151007064331.GC2152@nanopsycho.orion>
Date:	Wed, 7 Oct 2015 08:43:31 +0200
From:	Jiri Pirko <jiri@...nulli.us>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	netdev@...r.kernel.org, davem@...emloft.net,
	Jiri Pirko <jiri@...lanox.com>,
	Ido Schimmel <idosch@...lanox.com>,
	linux-kernel@...r.kernel.org, Elad Raz <eladr@...lanox.com>,
	Scott Feldman <sfeldma@...il.com>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] mlxsw: fix warnings for big-endian 32-bit dma_addr_t

Tue, Oct 06, 2015 at 11:47:44PM CEST, arnd@...db.de wrote:
>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 changes the type of the local variable to u64, which gets rid of the
>warning and seems nicer than adding #ifdefs.
>
>Signed-off-by: Arnd Bergmann <arnd@...db.de>
>Fixes: eda6500a987a "mlxsw: Add PCI bus implementation"

Acked-by: Jiri Pirko <jiri@...lanox.com>

Thanks!
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