linux-kernel - [PATCH] tracing/osnoise: set several trace_osnoise.c variables storage-class-specifier to static

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Message-Id: <20230309150414.4036764-1-trix@redhat.com>
Date:   Thu,  9 Mar 2023 10:04:14 -0500
From:   Tom Rix <trix@...hat.com>
To:     rostedt@...dmis.org, bristot@...nel.org, mhiramat@...nel.org
Cc:     linux-kernel@...r.kernel.org, linux-trace-kernel@...r.kernel.org,
        Tom Rix <trix@...hat.com>
Subject: [PATCH] tracing/osnoise: set several trace_osnoise.c variables storage-class-specifier to static

smatch reports several similar warnings
kernel/trace/trace_osnoise.c:220:1: warning:
  symbol '__pcpu_scope_per_cpu_osnoise_var' was not declared. Should it be static?
kernel/trace/trace_osnoise.c:243:1: warning:
  symbol '__pcpu_scope_per_cpu_timerlat_var' was not declared. Should it be static?
kernel/trace/trace_osnoise.c:335:14: warning:
  symbol 'interface_lock' was not declared. Should it be static?
kernel/trace/trace_osnoise.c:2242:5: warning:
  symbol 'timerlat_min_period' was not declared. Should it be static?
kernel/trace/trace_osnoise.c:2243:5: warning:
  symbol 'timerlat_max_period' was not declared. Should it be static?

These variables are only used in trace_osnoise.c, so it should be static

Signed-off-by: Tom Rix <trix@...hat.com>
---
 kernel/trace/trace_osnoise.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/kernel/trace/trace_osnoise.c b/kernel/trace/trace_osnoise.c
index f68ca1e6460f..cf395d2e8775 100644
--- a/kernel/trace/trace_osnoise.c
+++ b/kernel/trace/trace_osnoise.c
@@ -217,7 +217,7 @@ struct osnoise_variables {
 /*
  * Per-cpu runtime information.
  */
-DEFINE_PER_CPU(struct osnoise_variables, per_cpu_osnoise_var);
+static DEFINE_PER_CPU(struct osnoise_variables, per_cpu_osnoise_var);
 
 /*
  * this_cpu_osn_var - Return the per-cpu osnoise_variables on its relative CPU
@@ -240,7 +240,7 @@ struct timerlat_variables {
 	u64			count;
 };
 
-DEFINE_PER_CPU(struct timerlat_variables, per_cpu_timerlat_var);
+static DEFINE_PER_CPU(struct timerlat_variables, per_cpu_timerlat_var);
 
 /*
  * this_cpu_tmr_var - Return the per-cpu timerlat_variables on its relative CPU
@@ -332,7 +332,7 @@ struct timerlat_sample {
 /*
  * Protect the interface.
  */
-struct mutex interface_lock;
+static struct mutex interface_lock;
 
 /*
  * Tracer data.
@@ -2239,8 +2239,8 @@ static struct trace_min_max_param osnoise_print_stack = {
 /*
  * osnoise/timerlat_period: min 100 us, max 1 s
  */
-u64 timerlat_min_period = 100;
-u64 timerlat_max_period = 1000000;
+static u64 timerlat_min_period = 100;
+static u64 timerlat_max_period = 1000000;
 static struct trace_min_max_param timerlat_period = {
 	.lock	= &interface_lock,
 	.val	= &osnoise_data.timerlat_period,
-- 
2.27.0