[PATCH -next] powerpc/security: Fix symbol undeclared warning

[Wang Wensheng]

Build kernel with `C=2`:
arch/powerpc/kernel/security.c:253:6: warning: symbol 'stf_barrier' was
not declared. Should it be static?

Signed-off-by: Wang Wensheng <wangwensheng4 at huawei.com>
---
 arch/powerpc/kernel/security.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/kernel/security.c b/arch/powerpc/kernel/security.c
index c9876aab3142..fbcd5611a67e 100644
--- a/arch/powerpc/kernel/security.c
+++ b/arch/powerpc/kernel/security.c
@@ -250,7 +250,7 @@ ssize_t cpu_show_spectre_v2(struct device *dev, struct device_attribute *attr, c
 
 static enum stf_barrier_type stf_enabled_flush_types;
 static bool no_stf_barrier;
-bool stf_barrier;
+static bool stf_barrier;
 
 static int __init handle_no_stf_barrier(char *p)
 {
-- 
2.25.0