[PATCH] can: only call can_stat_update with procfs
From: Arnd Bergmann <arnd@arndb.de>
Date: 2016-06-20 15:54:04
Also in:
linux-can, lkml
Subsystem:
can network layer, the rest · Maintainers:
Oliver Hartkopp, Marc Kleine-Budde, Linus Torvalds
The change to leave out procfs support in CAN when CONFIG_PROC_FS
is not set was incomplete and leads to a build error:
net/built-in.o: In function `can_init':
:(.init.text+0x9858): undefined reference to `can_stat_update'
ERROR: "can_stat_update" [net/can/can.ko] undefined!
This tries a better approach, encapsulating all of the calls
within IS_ENABLED(), so we also leave out the timer function
from the object file.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: a20fadf85312 ("can: build proc support only if CONFIG_PROC_FS is activated")
---
net/can/af_can.c | 22 ++++++++++++----------
net/can/af_can.h | 11 -----------
2 files changed, 12 insertions(+), 21 deletions(-)
diff --git a/net/can/af_can.c b/net/can/af_can.c
index 166d436196c1..1108079d934f 100644
--- a/net/can/af_can.c
+++ b/net/can/af_can.c@@ -911,14 +911,14 @@ static __init int can_init(void) if (!rcv_cache) return -ENOMEM; - if (stats_timer) { + if (IS_ENABLED(CONFIG_PROC_FS)) { + if (stats_timer) { /* the statistics are updated every second (timer triggered) */ - setup_timer(&can_stattimer, can_stat_update, 0); - mod_timer(&can_stattimer, round_jiffies(jiffies + HZ)); - } else - can_stattimer.function = NULL; - - can_init_proc(); + setup_timer(&can_stattimer, can_stat_update, 0); + mod_timer(&can_stattimer, round_jiffies(jiffies + HZ)); + } + can_init_proc(); + } /* protocol register */ sock_register(&can_family_ops);
@@ -933,10 +933,12 @@ static __exit void can_exit(void) { struct net_device *dev; - if (stats_timer) - del_timer_sync(&can_stattimer); + if (IS_ENABLED(CONFIG_PROC_FS)) { + if (stats_timer) + del_timer_sync(&can_stattimer); - can_remove_proc(); + can_remove_proc(); + } /* protocol unregister */ dev_remove_pack(&canfd_packet);
diff --git a/net/can/af_can.h b/net/can/af_can.h
index 38a79ff20022..fca0fe9fc45a 100644
--- a/net/can/af_can.h
+++ b/net/can/af_can.h@@ -113,19 +113,8 @@ struct s_pstats { extern struct dev_rcv_lists can_rx_alldev_list; /* function prototypes for the CAN networklayer procfs (proc.c) */ -#ifdef CONFIG_PROC_FS void can_init_proc(void); void can_remove_proc(void); -#else -static inline void can_init_proc(void) -{ - pr_info("can: Can't create /proc/net/can. CONFIG_PROC_FS missing!\n"); -} - -static inline void can_remove_proc(void) -{ -} -#endif void can_stat_update(unsigned long data); /* structures and variables from af_can.c needed in proc.c for reading */
--
2.9.0