linux-kernel - Re: [PATCH] arch/x86/boot: sizeof macro

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Message-ID: <20171229194614.3iku5zg5oglrd2cl@gmail.com>
Date:   Fri, 29 Dec 2017 20:46:14 +0100
From:   Ingo Molnar <mingo@...nel.org>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     Saidgani Musaev <cpu808694@...il.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Thomas Gleixner <tglx@...utronix.de>, x86@...nel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] arch/x86/boot: sizeof macro


* Andy Shevchenko <andy.shevchenko@...il.com> wrote:

> On Fri, Dec 29, 2017 at 8:30 PM, Saidgani Musaev <cpu808694@...il.com> wrote:
> 
> No changelog, no explanation why...
> No SoB tag...
> 
> > -       ireg.cx  = sizeof buf;
> > +       ireg.cx  = sizeof(buf);
> 
> sizeof is operator, not a function.
> So, what are you trying to achieve?

That's true, but in the kernel coding style we use it as a function:

  triton:~/tip> git grep 'sizeof(' | wc -l
  116570

  triton:~/tip> git grep 'sizeof [:alnum:]' | wc -l
  177

Thanks,

	Ingo