[PATCH] mm, swap: make swap_slots_cache_mutex and swap_slots_cache_enable_mutex static

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From: Colin Ian King <colin.king@xxxxxxxxxxxxx>

The mutexes swap_slots_cache_mutex and swap_slots_cache_enable_mutex are
local to the source and do not need to be in global scope, so make them
static.

Cleans up sparse warnings:
symbol 'swap_slots_cache_mutex' was not declared. Should it be static?
symbol 'swap_slots_cache_enable_mutex' was not declared. Should it be
static?

Signed-off-by: Colin Ian King <colin.king@xxxxxxxxxxxxx>
---
 mm/swap_slots.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/swap_slots.c b/mm/swap_slots.c
index a791411fed71..008ccb22fee6 100644
--- a/mm/swap_slots.c
+++ b/mm/swap_slots.c
@@ -38,9 +38,9 @@ static DEFINE_PER_CPU(struct swap_slots_cache, swp_slots);
 static bool	swap_slot_cache_active;
 bool	swap_slot_cache_enabled;
 static bool	swap_slot_cache_initialized;
-DEFINE_MUTEX(swap_slots_cache_mutex);
+static DEFINE_MUTEX(swap_slots_cache_mutex);
 /* Serialize swap slots cache enable/disable operations */
-DEFINE_MUTEX(swap_slots_cache_enable_mutex);
+static DEFINE_MUTEX(swap_slots_cache_enable_mutex);
 
 static void __drain_swap_slots_cache(unsigned int type);
 static void deactivate_swap_slots_cache(void);
-- 
2.17.0

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