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can: build proc support only if CONFIG_PROC_FS is activated 

When building can subsystem with CONFIG_PROC_FS=n I detected some unused
variables warning by using proc functions. In CAN the proc handling is
nicely placed in one object file. This patch adds simple add a
dependency on CONFIG_PROC_FS for CAN's proc.o file and corresponding
static inline no-op functions.

Signed-off-by: Alexander Aring <aar@pengutronix.de>
Acked-by: Oliver Hartkopp <socketcan@hartkopp.net>
[mkl: provide static inline noops instead of using #ifdefs]
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Alexander Aring 2016-05-23 15:13:00 +02:00 committed by Marc Kleine-Budde
parent 3636876a56
commit a20fadf853
3 changed files with 14 additions and 3 deletions
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3
net/can/Makefile
View File

@ -3,7 +3,8 @@
#
obj-$(CONFIG_CAN) += can.o
can-y := af_can.o proc.o
can-y := af_can.o
can-$(CONFIG_PROC_FS) += proc.o
obj-$(CONFIG_CAN_RAW) += can-raw.o
can-raw-y := raw.o

11
net/can/af_can.h
View File

@ -113,8 +113,19 @@ 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 */

3
net/can/proc.c
View File

@ -517,8 +517,7 @@ void can_init_proc(void)
can_dir = proc_mkdir("can", init_net.proc_net);
if (!can_dir) {
printk(KERN_INFO "can: failed to create /proc/net/can . "
"CONFIG_PROC_FS missing?\n");
pr_info("can: failed to create /proc/net/can.\n");
return;
}