[RFC PATCH] rcuperf: mem_begin can be static

[kbuild test robot <lkp@xxxxxxxxx>]

Fixes: e4b6bfefb245 ("rcuperf: Measure memory footprint during kfree_rcu() test (v4)")
Signed-off-by: kbuild test robot <lkp@xxxxxxxxx>
---
 rcuperf.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/rcu/rcuperf.c b/kernel/rcu/rcuperf.c
index c41f009acbbb5..4f642e7b25fa6 100644
--- a/kernel/rcu/rcuperf.c
+++ b/kernel/rcu/rcuperf.c
@@ -617,7 +617,7 @@ DEFINE_KFREE_OBJ(32); // goes on kmalloc-64 slab
 DEFINE_KFREE_OBJ(64); // goes on kmalloc-96 slab
 DEFINE_KFREE_OBJ(96); // goes on kmalloc-128 slab
 
-long long mem_begin;
+static long long mem_begin;
 
 static int
 kfree_perf_thread(void *arg)