timer_list: Guard procfs specific code

[ Upstream commit a9314773a91a1d3b36270085246a6715a326ff00 ]

With CONFIG_PROC_FS=n the following warning is emitted:

kernel/time/timer_list.c:361:36: warning: unused variable
'timer_list_sops' [-Wunused-const-variable]
   static const struct seq_operations timer_list_sops = {

Add #ifdef guard around procfs specific code.

Signed-off-by: Nathan Huckleberry <nhuck@google.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Cc: john.stultz@linaro.org
Cc: sboyd@kernel.org
Cc: clang-built-linux@googlegroups.com
Link: https://github.com/ClangBuiltLinux/linux/issues/534
Link: https://lkml.kernel.org/r/20190614181604.112297-1-nhuck@google.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/kernel/time/timer_list.c b/kernel/time/timer_list.c
index d647dab..07afcfe 100644 (file)
--- a/kernel/time/timer_list.c
+++ b/kernel/time/timer_list.c
@@ -287,23 +287,6 @@ static inline void timer_list_header(struct seq_file *m, u64 now)
        SEQ_printf(m, "\n");
 }
 
-static int timer_list_show(struct seq_file *m, void *v)
-{
-       struct timer_list_iter *iter = v;
-
-       if (iter->cpu == -1 && !iter->second_pass)
-               timer_list_header(m, iter->now);
-       else if (!iter->second_pass)
-               print_cpu(m, iter->cpu, iter->now);
-#ifdef CONFIG_GENERIC_CLOCKEVENTS
-       else if (iter->cpu == -1 && iter->second_pass)
-               timer_list_show_tickdevices_header(m);
-       else
-               print_tickdevice(m, tick_get_device(iter->cpu), iter->cpu);
-#endif
-       return 0;
-}
-
 void sysrq_timer_list_show(void)
 {
        u64 now = ktime_to_ns(ktime_get());
@@ -322,6 +305,24 @@ void sysrq_timer_list_show(void)
        return;
 }
 
+#ifdef CONFIG_PROC_FS
+static int timer_list_show(struct seq_file *m, void *v)
+{
+       struct timer_list_iter *iter = v;
+
+       if (iter->cpu == -1 && !iter->second_pass)
+               timer_list_header(m, iter->now);
+       else if (!iter->second_pass)
+               print_cpu(m, iter->cpu, iter->now);
+#ifdef CONFIG_GENERIC_CLOCKEVENTS
+       else if (iter->cpu == -1 && iter->second_pass)
+               timer_list_show_tickdevices_header(m);
+       else
+               print_tickdevice(m, tick_get_device(iter->cpu), iter->cpu);
+#endif
+       return 0;
+}
+
 static void *move_iter(struct timer_list_iter *iter, loff_t offset)
 {
        for (; offset; offset--) {
@@ -381,3 +382,4 @@ static int __init init_timer_list_procfs(void)
        return 0;
 }
 __initcall(init_timer_list_procfs);
+#endif