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] [day] [month] [year] [list]
Date:	Wed, 12 May 2010 15:24:09 +1000
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	tglx@...uxtronix.de, mingo@...e.hu, davem@...emloft.net,
	lethal@...ux-sh.org
Subject: Re: [PATCH 05/25] lmb: Factor the lowest level alloc function

On Tue, 2010-05-11 at 14:30 +0200, Thomas Gleixner wrote:
> On Mon, 10 May 2010, Benjamin Herrenschmidt wrote:
> >  
> > @@ -396,33 +406,24 @@ u64 __init __lmb_alloc_base(u64 size, u64 align, u64 max_addr)
> >  	if (max_addr == LMB_ALLOC_ANYWHERE)
> >  		max_addr = LMB_REAL_LIMIT;
> >  
> > +	/* Pump up max_addr */
> > +	if (max_addr == LMB_ALLOC_ANYWHERE)
> > +		max_addr = ~(u64)0;
> > +	
> 
>   That if is pretty useless as you set max_addr to LMB_REAL_LIMIT
>   right above.

Well, actually no :-) LMB_REAL_LIMIT can actually be == to
LMB_ALLOC_ANYWHERE which at this stage in the series is still 0, so we
must not miss the second bit.

Subsequent patches remove this anyways as LMB_ALLOC_ANYWHERE gets turned
into ~0 which makes more sense.

So it's a bit weird looking, but it's correct and transitory code only.

Cheers,
Ben.


--
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