Julia Lawall wrote:
> The variable x is initialized twice to the same (side effect-free)
> expression. Drop one initialization.
[...]
> --- a/drivers/char/mmtimer.c
> +++ b/drivers/char/mmtimer.c
> @@ -546,9 +546,9 @@ static void mmtimer_tasklet(unsigned long data)
> {
> int nodeid = data;
> struct mmtimer_node *mn = &timers[nodeid];
> - struct mmtimer *x = rb_entry(mn->next, struct mmtimer, list);
> + struct mmtimer *x;
> struct k_itimer *t;
> unsigned long flags;
The next x = rb_entry(mn->next, struct mmtimer, list); is preceded by a
test whether mn->next is NULL.
Unless that test is redundant too, your patch fixes a potential NULL
pointer dereference, introduced by commit cbacdd95 "SGI Altix mmtimer:
allow larger number of timers per node" in 2.6.26.
--
Stefan Richter
-=====-==-=- ---= =---=
http://arcgraph.de/sr/
--
To unsubscribe from this list: send the line "unsubscribe kernel-janitors" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
