[lkml]   [2006]   [Jan]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH] powerpc: remove useless spinlock from mpc83xx watchdog
On Iau, 2006-01-19 at 00:58 -0600, Kumar Gala wrote:
> Since we can only open the watchdog once having a spinlock to protect
> multiple access is pointless.
> Signed-off-by: Kumar Gala <>


This is a common mistake.

open is called on the open() call and is indeed in this case 'single
open', but file handles can be inherited and many users may have access
to a single file handle.


f = open("/dev/watchdog", O_RDWR);
while(1) {
write(f, "Boing", 5);

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2006-01-19 10:52    [from the cache]
©2003-2014 Jasper Spaans. hosted at Digital Ocean