linux-kernel - Re: How to printk unsigned long long variable?

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 15 Jun 2007 09:14:25 -0700
From:	Roland Dreier <rdreier@...co.com>
To:	"jidong xiao" <jidong.xiao@...il.com>
Cc:	"Randy Dunlap" <randy.dunlap@...cle.com>,
	"Vegard Nossum" <vegard.nossum@...il.com>,
	linux-kernel@...r.kernel.org
Subject: Re: How to printk unsigned long long variable?

 > Is this right?

 >        dev->dev.dma_mask = bus->controller->dma_mask;
 >        printk(KERN_ERR "hey,jason,see,dma_mask is
 > %llu\n",*(dev->dev.dma_mask));

No, why do you have the '*' -- dma_mask isn't a pointer, is it?

You probably want:

	printk(KERN_ERR "hey,jason,see,dma_mask is %llx\n",
	       (unsigned long long) dev->dev.dma_mask);

(I would use a "%llx" format because masks are much clearer in hex).
The cast to unsigned long long is there because u64 is just unsigned
long on some 64-bit platforms, so you get a warning about the format
not matching on some architectures without the cast.

 - R.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/