From: Thomas Hood <jdthood@mail.com>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Question about rtc_lock
Date: 06 Oct 2001 09:06:24 -0400 [thread overview]
Message-ID: <1002373586.813.119.camel@thanatos> (raw)
In-Reply-To: <E15pr4y-0001CV-00@the-village.bc.nu>
In-Reply-To: <E15pr4y-0001CV-00@the-village.bc.nu>
On Sat, 2001-10-06 at 09:01, Alan Cox wrote:
> > spin_lock(&rtc_lock);
> > CMOS_WRITE(v, sbf_port);
> > spin_unlock(&rtc_lock);
> >
> > Does this code run with irqs disabled, or should these
> > spinlocks be _irq ?
>
> The CMOS isnt accessed from IRQ handlers
No, but what if the rtc interrupts while the lock is held in this
bit of code?
Thomas
next prev parent reply other threads:[~2001-10-06 13:06 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-10-06 3:49 Question about rtc_lock Thomas Hood
2001-10-06 13:01 ` Alan Cox
2001-10-06 13:06 ` Thomas Hood [this message]
2001-10-06 13:13 ` Alan Cox
2001-10-06 14:40 ` Thomas Hood
2001-10-06 15:24 ` Jonathan Lundell
2001-10-07 3:24 ` Thomas Hood
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