linux-kernel - RE: [Patch 1/2] cciss: fix for 2TB support

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Message-ID: <226E1C65E4F6164E8EA5FD3CC913AE8C5C80F7@G3W0639.americas.hpqcorp.net>
Date:	Thu, 22 Feb 2007 21:22:19 -0000
From:	"Miller, Mike (OS Dev)" <Mike.Miller@...com>
To:	"Mike Miller (OS Dev)" <mikem@...rdog.cca.cpqcorp.net>,
	"Andrew Morton" <akpm@...ux-foundation.org>
Cc:	<jens.axboe@...cle.com>, <linux-kernel@...r.kernel.org>,
	<linux-scsi@...r.kernel.org>, <gregkh@...ell.com>
Subject: RE: [Patch 1/2] cciss: fix for 2TB support

 

> -----Original Message-----
> From: Mike Miller (OS Dev) [mailto:mikem@...rdog.cca.cpqcorp.net] 
> 
> Andrew,
> Using this test program and changing the type of x to int, 
> long, long long signed and unsigned the comparison always 
> worked on x86, x86_64, and ia64. It looks to me like the 
> comparsion will always do what we expect. Unless you see some 
> other problem.
> 
> 
> #include <stdio.h>
> 
> int main(int argc, char *argv[])
> {
> 	unsigned long long x;
> 	
> 	x =  0x00000000ffffffff;
> 
> 	printf(sizeof(x) == 8 ? 
> 		"x = %lld, sizeof(x) = %d\n" :
> 		"x = %ld, sizeof(x) = %d\n",  x, sizeof(x));
> 	if (x == 0xffffffff)
> 		printf("equal\n");
> 	else
> 		printf("not equal\n");
> 	
> }
> 
> -- mikem
> 
BTW: also changed x to be 8 f's, 16 f's, and 8 and 8 as shown.
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