[PATCH] net: can: Convert timers to use timer_setup()

[Kees Cook]

In preparation for unconditionally passing the struct timer_list pointer to
all timer callbacks, switch to using the new timer_setup() and from_timer()
to pass the timer pointer explicitly.

Cc: Oliver Hartkopp <socket...@hartkopp.net>
Cc: Marc Kleine-Budde <m...@pengutronix.de>
Cc: "David S. Miller" <da...@davemloft.net>
Cc: linux-...@vger.kernel.org
Cc: netdev@vger.kernel.org
Cc: Thomas Gleixner <t...@linutronix.de>
Signed-off-by: Kees Cook <keesc...@chromium.org>
---
This requires commit 686fef928bba ("timer: Prepare to change timer
callback argument type") in v4.14-rc3, but should be otherwise
stand-alone.
---
 net/can/af_can.c | 4 ++--
 net/can/af_can.h | 2 +-
 net/can/proc.c   | 8 ++++----
 3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/net/can/af_can.c b/net/can/af_can.c
index 88edac0f3e36..1f75e11ac35a 100644
--- a/net/can/af_can.c
+++ b/net/can/af_can.c
@@ -882,8 +882,8 @@ static int can_pernet_init(struct net *net)
        if (IS_ENABLED(CONFIG_PROC_FS)) {
                /* the statistics are updated every second (timer triggered) */
                if (stats_timer) {
-                       setup_timer(&net->can.can_stattimer, can_stat_update,
-                                   (unsigned long)net);
+                       timer_setup(&net->can.can_stattimer, can_stat_update,
+                                   0);
                        mod_timer(&net->can.can_stattimer,
                                  round_jiffies(jiffies + HZ));
                }
diff --git a/net/can/af_can.h b/net/can/af_can.h
index d0ef45bb2a72..eca6463c6213 100644
--- a/net/can/af_can.h
+++ b/net/can/af_can.h
@@ -113,6 +113,6 @@ struct s_pstats {
 /* function prototypes for the CAN networklayer procfs (proc.c) */
 void can_init_proc(struct net *net);
 void can_remove_proc(struct net *net);
-void can_stat_update(unsigned long data);
+void can_stat_update(struct timer_list *t);
 
 #endif /* AF_CAN_H */
diff --git a/net/can/proc.c b/net/can/proc.c
index 83045f00c63c..d979b3dc49a6 100644
--- a/net/can/proc.c
+++ b/net/can/proc.c
@@ -115,9 +115,9 @@ static unsigned long calc_rate(unsigned long oldjif, 
unsigned long newjif,
        return rate;
 }
 
-void can_stat_update(unsigned long data)
+void can_stat_update(struct timer_list *t)
 {
-       struct net *net = (struct net *)data;
+       struct net *net = from_timer(net, t, can.can_stattimer);
        struct s_stats *can_stats = net->can.can_stats;
        unsigned long j = jiffies; /* snapshot */
 
@@ -221,7 +221,7 @@ static int can_stats_proc_show(struct seq_file *m, void *v)
 
        seq_putc(m, '\n');
 
-       if (net->can.can_stattimer.function == can_stat_update) {
+       if (net->can.can_stattimer.function == 
(TIMER_FUNC_TYPE)can_stat_update) {
                seq_printf(m, " %8ld %% total match ratio (RXMR)\n",
                                can_stats->total_rx_match_ratio);
 
@@ -291,7 +291,7 @@ static int can_reset_stats_proc_show(struct seq_file *m, 
void *v)
 
        user_reset = 1;
 
-       if (net->can.can_stattimer.function == can_stat_update) {
+       if (net->can.can_stattimer.function == 
(TIMER_FUNC_TYPE)can_stat_update) {
                seq_printf(m, "Scheduled statistic reset #%ld.\n",
                                can_pstats->stats_reset + 1);
        } else {
-- 
2.7.4


-- 
Kees Cook
Pixel Security