linux-kernel - Re: [PATCH 4/4] MIPS/kernel/proc: Combine four seq_printf() calls into one call in show

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Date:   Tue, 25 Oct 2016 11:08:22 +0200
From:   Ralf Baechle <ralf@...ux-mips.org>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     SF Markus Elfring <elfring@...rs.sourceforge.net>,
        Linux MIPS Mailing List <linux-mips@...ux-mips.org>,
        Andrea Gelmini <andrea.gelmini@...ma.net>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Leonid Yegoshin <Leonid.Yegoshin@...tec.com>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Matt Redfearn <matt.redfearn@...tec.com>,
        Paul Burton <paul.burton@...tec.com>,
        Paul Gortmaker <paul.gortmaker@...driver.com>,
        Zubair Lutfullah Kakakhel <Zubair.Kakakhel@...tec.com>,
        LKML <linux-kernel@...r.kernel.org>,
        "kernel-janitors@...r.kernel.org" <kernel-janitors@...r.kernel.org>
Subject: Re: [PATCH 4/4] MIPS/kernel/proc: Combine four seq_printf() calls
 into one call in show_cpuinfo()

On Tue, Oct 25, 2016 at 10:55:42AM +0200, Geert Uytterhoeven wrote:

> > -       seq_printf(m, "shadow register sets\t: %d\n",
> > -                     cpu_data[n].srsets);
> > -       seq_printf(m, "kscratch registers\t: %d\n",
> > -                     hweight8(cpu_data[n].kscratch_mask));
> > -       seq_printf(m, "package\t\t\t: %d\n", cpu_data[n].package);
> > -       seq_printf(m, "core\t\t\t: %d\n", cpu_data[n].core);
> > +       seq_printf(m,
> > +                  "shadow register sets\t: %d\n"
> > +                  "kscratch registers\t: %d\n"
> > +                  "package\t\t\t: %d\n"
> > +                  "core\t\t\t: %d\n",
> > +                  cpu_data[n].srsets,
> > +                  hweight8(cpu_data[n].kscratch_mask),
> > +                  cpu_data[n].package,
> > +                  cpu_data[n].core);
> 
> I think the code is much easier to read with separate seq_printf()s for
> each line printed.

Which is why I originally implemented this as separate function calls.
Code size and performance are hardly an argument for /proc/cpuinfo.

  Ralf