linux-kernel - Re: [PATCH] clk: axi-clkgen: Remove sometimes impossible check

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Date:	Sat, 30 Jan 2016 15:59:37 +0100
From:	Lars-Peter Clausen <lars@...afoo.de>
To:	Stephen Boyd <sboyd@...eaurora.org>,
	Mike Turquette <mturquette@...libre.com>
Cc:	linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org
Subject: Re: [PATCH] clk: axi-clkgen: Remove sometimes impossible check

On 01/30/2016 02:13 AM, Stephen Boyd wrote:
> The size of unsigned long on 64-bit architectures is equal to the
> size of u64, so this check is impossible there. This throws off
> static checkers:
> 
> drivers/clk/clk-axi-clkgen.c:331 axi_clkgen_recalc_rate() warn:
> impossible condition '(tmp > (~0)) => (0-u64max > u64max)'
> 
> Let's change this code to use min_t() instead so that we
> get the same effect on architectures where sizeof(unsigned long)
> doesn't equal sizeof(u64).
> 
> Cc: Lars-Peter Clausen <lars@...afoo.de>
> Signed-off-by: Stephen Boyd <sboyd@...eaurora.org>

Thanks.

Acked-by: Lars-Peter Clausen <lars@...afoo.de>