From a20fadf85312f7e999c7279af3e038e4f3539fbf Mon Sep 17 00:00:00 2001 From: Alexander Aring Date: Mon, 23 May 2016 15:13:00 +0200 Subject: [PATCH] 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 Acked-by: Oliver Hartkopp [mkl: provide static inline noops instead of using #ifdefs] Signed-off-by: Marc Kleine-Budde --- net/can/Makefile | 3 ++- net/can/af_can.h | 11 +++++++++++ net/can/proc.c | 3 +-- 3 files changed, 14 insertions(+), 3 deletions(-) diff --git a/net/can/Makefile b/net/can/Makefile index cef49eb1f5c7..10936754e3f2 100644 --- a/net/can/Makefile +++ b/net/can/Makefile @@ -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 diff --git a/net/can/af_can.h b/net/can/af_can.h index fca0fe9fc45a..38a79ff20022 100644 --- a/net/can/af_can.h +++ b/net/can/af_can.h @@ -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 */ diff --git a/net/can/proc.c b/net/can/proc.c index 1a19b985a868..85ef7bb0f176 100644 --- a/net/can/proc.c +++ b/net/can/proc.c @@ -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; }