psi: make psi_enable static

psi_enable is not used outside of psi.c, make it static.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Suren Baghdasaryan <[email protected]>
Suggested-by: Andrew Morton <[email protected]>
Acked-by: Johannes Weiner <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

Author: surenbaghdasaryan

kernel/sched/psi.c

@@ -140,9 +140,9 @@ static int psi_bug __read_mostly;
 DEFINE_STATIC_KEY_FALSE(psi_disabled);
 
 #ifdef CONFIG_PSI_DEFAULT_DISABLED
-bool psi_enable;
+static bool psi_enable;
 #else
-bool psi_enable = true;
+static bool psi_enable = true;
 #endif
 static int __init setup_psi(char *str)
 {