linux-kernel - Re: [PATCH] ACPI: replace strlen("string") with sizeof("string") -1

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Message-ID: <CAFLxGvz=cYJQhCi99trBN8=hGA9XmY8Z7weNmnASYTqAbr0PEw@mail.gmail.com>
Date:	Mon, 30 Jul 2012 16:41:48 +0200
From:	richard -rw- weinberger <richard.weinberger@...il.com>
To:	Ian Campbell <ijc@...lion.org.uk>
Cc:	Len Brown <lenb@...nel.org>,
	Alan Stern <stern@...land.harvard.edu>,
	linux-acpi@...r.kernel.org, linux-pm@...ts.linux-foundation.org,
	Pavel Vasilyev <pavel@...linux.ru>,
	linux-kernel@...r.kernel.org, Len Brown <len.brown@...el.com>
Subject: Re: [PATCH] ACPI: replace strlen("string") with sizeof("string") -1

On Mon, Jul 30, 2012 at 4:26 PM, Ian Campbell <ijc@...lion.org.uk> wrote:
> I thought gcc optimised strlen("string literal") into a compile time
> constant too. It does in a little userspace test I just wrote, but I
> didn't look at its behaviour with the kernel's strlen.

It depends whether you use the built-in strlen() or not.
AFAIK the kernel does not use the built-in variant.

-- 
Thanks,
//richard
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