lkml.org 
[lkml]   [2001]   [Oct]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: Question about rtc_lock
From
Date
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


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:04    [W:0.054 / U:3.372 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site