linux-kernel - Re: replace "memset(...,0,PAGE_SIZE)" calls with "clear

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:	Mon, 1 Jan 2007 09:09:31 -0800
From:	Randy Dunlap <rdunlap@...otime.net>
To:	Paul Mundt <lethal@...ux-sh.org>
Cc:	Folkert van Heusden <folkert@...heusden.com>,
	"Robert P. J. Day" <rpjday@...dspring.com>,
	Arjan van de Ven <arjan@...radead.org>,
	Denis Vlasenko <vda.linux@...glemail.com>,
	Linux kernel mailing list <linux-kernel@...r.kernel.org>
Subject: Re: replace "memset(...,0,PAGE_SIZE)" calls with "clear_page()"?

On Mon, 1 Jan 2007 17:42:31 +0900 Paul Mundt wrote:

> On Mon, Jan 01, 2007 at 02:59:32AM +0100, Folkert van Heusden wrote:
> > > > regarding alignment that don't allow clear_page() to be used
> > > > copy_page() in the memcpy() case), but it's going to need a lot of
> > 
> > Maybe these optimalisations should be in the coding style docs?
> > 
> For what purpose? CodingStyle is not about documenting usage constraints
> for every minor part of the kernel. If someone intends to use an API,
> it's up to them to figure out the semantics for doing so. Let's not
> confuse common sense with style.
> -

I agree, these aren't CodingStyle material.  They could make sense
in some other doc, either MM/VM-related or more general.

I've often wanted a somewhat introductory doc about Linux environmental
assumptions (memory model, pointers/longs, data cleared to 0,
many other items that I don't have on my fingertips).

---
~Randy
-
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/