linux-kernel - Re: [PATCH 11/13] kexec-bzImage: Support for loading bzImage using 64bit entry

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Message-ID: <539DD04F.9020507@zytor.com>
Date:	Sun, 15 Jun 2014 09:56:47 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Borislav Petkov <bp@...en8.de>, Vivek Goyal <vgoyal@...hat.com>
CC:	linux-kernel@...r.kernel.org, kexec@...ts.infradead.org,
	ebiederm@...ssion.com, mjg59@...f.ucam.org, greg@...ah.com,
	jkosina@...e.cz, dyoung@...hat.com, chaowang@...hat.com,
	bhe@...hat.com, akpm@...ux-foundation.org
Subject: Re: [PATCH 11/13] kexec-bzImage: Support for loading bzImage using
 64bit entry

On 06/15/2014 09:35 AM, Borislav Petkov wrote:
> 
>> +	if (memcmp((char *)&header->header, "HdrS", 4) != 0) {
> 
> Not strncmp? "HdrS" is a string...
> 

No, memcmp() is more appropriate.  It is really more of a byte sequence
than a string.

It could just as easily be done as:

	header->header == 0x53726448

	-hpa

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