linux-kernel - Re: [net-next PATCH 1/2] mlxsw: spectrum_kvdl: use div

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Message-Id: <20180226.113323.393948046273779787.davem@davemloft.net>
Date:   Mon, 26 Feb 2018 11:33:23 -0500 (EST)
From:   David Miller <davem@...emloft.net>
To:     arnd@...db.de
Cc:     arkadis@...lanox.com, jiri@...lanox.com, idosch@...lanox.com,
        weiyongjun1@...wei.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [net-next PATCH 1/2] mlxsw: spectrum_kvdl: use div_u64() for
 64-bit division

From: Arnd Bergmann <arnd@...db.de>
Date: Fri, 23 Feb 2018 14:15:31 +0100

> Calculating the number of entries now uses 64-bit arithmetic that
> causes a link error on 32-bit architectures:
> 
> drivers/net/ethernet/mellanox/mlxsw/spectrum_kvdl.o: In function `mlxsw_sp_kvdl_init':
> spectrum_kvdl.c:(.text+0x51c): undefined reference to `__aeabi_uldivmod'
> 
> We could probably use a 32-bit division here as before, but since this is
> not in a performance critical path, div_u64() seems cleaner here.
> 
> Fixes: 887839e6960d ("mlxsw: spectrum_kvdl: Add support for dynamic partition set")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

Applied.