linux-kernel - Re: Hexagon-setup: Combine four seq_printf() calls into one call in show

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Message-ID: <48d54097-6be3-d39d-2af9-d4ad90c3c417@users.sourceforge.net>
Date:   Fri, 21 Oct 2016 19:33:30 +0200
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     Theodore Ts'o <tytso@....edu>, linux-hexagon@...r.kernel.org
Cc:     Julia Lawall <julia.lawall@...6.fr>,
        Richard Kuo <rkuo@...eaurora.org>,
        LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: Re: Hexagon-setup: Combine four seq_printf() calls into one call in
 show_cpuinfo()

>> Is it really so difficult to interpret the suggested construction
>> of a single (and relatively small) format string?
> 
> It's not so difficult, so much as it makes things worse.  It's easier
> the way it originally was.

Thanks for your view on this refactoring approach.


> It might be interesting to see if the compiler could be taught
> to collapse the function calls,

How does this wish fit to your previous rejection?


> but (a) this isn't performance critical,

This can be.


> and (b) the number of bytes saved is really tiny.

I imagine that the corresponding code and data size reduction could
be occasionally useful, couldn't it?


> But at least if the compiler was doing the work, it would at least deal with
> it everywhere.

I would find such an optimisation possibility also nice.

Can it become acceptable to achieve a similar effect by the application
of scripts for the semantic patch language in the meantime?

Regards,
Markus