linux-kernel - is_err checking

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Date:	Sat, 23 Jul 2016 16:56:14 +0200 (CEST)
From:	Julia Lawall <julia.lawall@...6.fr>
To:	kernel-janitors@...r.kernel.org
cc:	linux-kernel@...r.kernel.org
Subject: is_err checking

Code like the following looks a bit clunky to me:

if (IS_ERR(data->clk) && PTR_ERR(data->clk) != -EPROBE_DEFER)

Is there any reason not to always use eg

data->clk == ERR_PTR(-EPROBE_DEFER)

Code of the latter form is a bit more popular.  Perhaps one could want
something like:

IS_ERR_VALUE(data->clk, -EPROBE_DEFER)

but IS_ERR_VALUE is laready used for something else.

julia