[072/181] mm/swap_slots.c: remove always zero and unused return value of enable_swap_slots_cache()

Commit Message

Andrew Morton Oct. 13, 2020, 11:52 p.m. UTC

From: Miaohe Lin <[e-mail]>
Subject: mm/swap_slots.c: remove always zero and unused return value of enable_swap_slots_cache()

enable_swap_slots_cache() always return zero and its return value is just
ignored by the caller.  So make enable_swap_slots_cache() void.

Link: https://lkml.kernel.org/r/[e-mail]
Signed-off-by: Miaohe Lin <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
---

 include/linux/swap_slots.h |    2 +-
 mm/swap_slots.c            |    3 +--
 2 files changed, 2 insertions(+), 3 deletions(-)

Patch

--- a/include/linux/swap_slots.h~mm-swap_slotsc-remove-always-zero-and-unused-return-value-of-enable_swap_slots_cache
+++ a/include/linux/swap_slots.h
@@ -23,7 +23,7 @@  struct swap_slots_cache {
 
 void disable_swap_slots_cache_lock(void);
 void reenable_swap_slots_cache_unlock(void);
-int enable_swap_slots_cache(void);
+void enable_swap_slots_cache(void);
 int free_swap_slot(swp_entry_t entry);
 
 extern bool swap_slot_cache_enabled;
--- a/mm/swap_slots.c~mm-swap_slotsc-remove-always-zero-and-unused-return-value-of-enable_swap_slots_cache
+++ a/mm/swap_slots.c
@@ -237,7 +237,7 @@  static int free_slot_cache(unsigned int
 	return 0;
 }
 
-int enable_swap_slots_cache(void)
+void enable_swap_slots_cache(void)
 {
 	mutex_lock(&swap_slots_cache_enable_mutex);
 	if (!swap_slot_cache_initialized) {
@@ -255,7 +255,6 @@  int enable_swap_slots_cache(void)
 	__reenable_swap_slots_cache();
 out_unlock:
 	mutex_unlock(&swap_slots_cache_enable_mutex);
-	return 0;
 }
 
 /* called with swap slot cache's alloc lock held */