linux-kernel - Re: [PATCH 2/6] Blackfin Serial Driver: Add a debug function to serial driver.

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 for Android: free password hash cracker in your pocket

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

Date:	Wed, 15 Oct 2008 10:23:41 +0800
From:	gyang <graf.yang@...log.com>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	Bryan Wu <cooloney@...nel.org>, alan@...hat.com,
	linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org
Subject: Re: [PATCH 2/6] Blackfin Serial Driver: Add a debug function to
	serial driver.

Hi, Alan,

We are making a SMP like patch to blackfin, cpu_relax() is replaced by a
data cache flush function which will count it to a per-cpu counter.
If this serial function is called too early, the per-cpu data area have
not been initialized, this call will cause crash.
So we'd like to use barrier() instead of cpu_relax().

BRs,
Graf

在 2008-10-14二的 14:27 +0100，Alan Cox写道：
> > -		cpu_relax();
> > +		barrier();
> > +
> 
> Seems to be an odd unrelated change ?
--
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/