lkml.org 
[lkml]   [2004]   [Jan]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] rwlock_is_locked undefined for UP systems
On Fri, Jan 16, 2004 at 07:15:11PM +0530, Prashanth T wrote:
> Hi,
> I had to use rwlock_is_locked( ) with linux2.6 for kdb and noticed that
> this routine to be undefined for UP. I have attached the patch for 2.6.1
> below to return 0 for rwlock_is_locked( ) on UP systems.
> Please let me know.

we don't implement spin_is_locked on UP either because there's no really
usefull return value. The lock will never be taken on !SMP && !PREEMPT,
but OTOH it's also not needed, so any assert on will give false results.
And the assert is probably the only thing that the _is_locked routines
could used for sanely.

-
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 14:00    [from the cache]
©2003-2011 Jasper Spaans