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:	Sat, 14 Jul 2012 13:43:36 -0700
From:	Joe Perches <joe@...ches.com>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	Pekka Enberg <penberg@...nel.org>, mingo@...nel.org,
	linux-kernel@...r.kernel.org, x86@...nel.org,
	Tejun Heo <tj@...nel.org>
Subject: Re: [PATCH 2/3] x86/mm: Simplify for-loop in free_init_pages()

On Sat, 2012-07-14 at 13:36 -0700, Yinghai Lu wrote:
> On Sat, Jul 14, 2012 at 6:41 AM, Pekka Enberg <penberg@...nel.org> wrote:
> > As a cleanup, move initial "addr" assignment to the for-loop construct
> > in free_init_pages().

Not really a good idea.

> > diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
[]
> > @@ -349,8 +349,6 @@ void free_init_pages(char *what, unsigned long begin, unsigned long end)
> >         if (begin >= end)
> >                 return;
> >
> > -       addr = begin;
> > -
> >         /*
> >          * If debugging page accesses then do not free this memory but
> >          * mark them not present - any buggy init-section access will
> > @@ -371,7 +369,7 @@ void free_init_pages(char *what, unsigned long begin, unsigned long end)
> >
> >         printk(KERN_INFO "Freeing %s: %luk freed\n", what, (end - begin) >> 10);
> >
> > -       for (; addr < end; addr += PAGE_SIZE) {
> > +       for (addr = begin; addr < end; addr += PAGE_SIZE) {
> >                 ClearPageReserved(virt_to_page(addr));
> >                 init_page_count(virt_to_page(addr));
> >                 memset((void *)addr, POISON_FREE_INITMEM, PAGE_SIZE);
> > --

Now there's an unused variable warning when CONFIG_DEBUG_PAGEALLOC

--
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/

Powered by blists - more mailing lists