disable kernel build waring

hc

2024-05-10 093a6c67005148ae32a5c9e4553491b9f5c2457b

 kernel/include/linux/swap_slots.h
..
..
@@ -23,7 +23,7 @@
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 void disable_swap_slots_cache_lock(void);
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 void reenable_swap_slots_cache_unlock(void);
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-int enable_swap_slots_cache(void);
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+void enable_swap_slots_cache(void);
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 int free_swap_slot(swp_entry_t entry);
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 extern bool swap_slot_cache_enabled;