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

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Message-ID: <1343658373.15432.18.camel@zakaz.uk.xensource.com>
Date:	Mon, 30 Jul 2012 15:26:13 +0100
From:	Ian Campbell <ijc@...lion.org.uk>
To:	Len Brown <lenb@...nel.org>
Cc:	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 Thu, 2012-07-26 at 21:39 -0400, Len Brown wrote:
> ...both give the number of chars in the string
> without the '\0', as strncmp() wants,
> but sizeof() is compile-time.

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.

Ian.

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