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authorZhen Lei <thunder.leizhen@huawei.com>2020-08-06 23:20:11 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-08-07 11:33:24 -0700
commite0f3ebba97f190ce988829ccc5b527e8eef40e01 (patch)
tree8de4841418c17557771fe40e07c0e8142d4f5efa /mm/swap_slots.c
parentd69a9575f57ef742df599f1186dcbfb28af0f846 (diff)
downloadlinux-e0f3ebba97f190ce988829ccc5b527e8eef40e01.tar.bz2
mm/swap_slots.c: remove redundant check for swap_slot_cache_initialized
Because enable_swap_slots_cache can only become true in enable_swap_slots_cache(), and depends on swap_slot_cache_initialized is true before. That means, when enable_swap_slots_cache is true, swap_slot_cache_initialized is true also. So the condition: "swap_slot_cache_enabled && swap_slot_cache_initialized" can be reduced to "swap_slot_cache_enabled" And in mathematics: "!swap_slot_cache_enabled || !swap_slot_cache_initialized" is equal to "!(swap_slot_cache_enabled && swap_slot_cache_initialized)" So no functional change. Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Tim Chen <tim.c.chen@linux.intel.com> Link: http://lkml.kernel.org/r/20200430061143.450-4-thunder.leizhen@huawei.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/swap_slots.c')
-rw-r--r--mm/swap_slots.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/mm/swap_slots.c b/mm/swap_slots.c
index b40394473a3c..3e6453573a89 100644
--- a/mm/swap_slots.c
+++ b/mm/swap_slots.c
@@ -46,8 +46,7 @@ static void __drain_swap_slots_cache(unsigned int type);
static void deactivate_swap_slots_cache(void);
static void reactivate_swap_slots_cache(void);
-#define use_swap_slot_cache (swap_slot_cache_active && \
- swap_slot_cache_enabled && swap_slot_cache_initialized)
+#define use_swap_slot_cache (swap_slot_cache_active && swap_slot_cache_enabled)
#define SLOTS_CACHE 0x1
#define SLOTS_CACHE_RET 0x2
@@ -94,7 +93,7 @@ static bool check_cache_active(void)
{
long pages;
- if (!swap_slot_cache_enabled || !swap_slot_cache_initialized)
+ if (!swap_slot_cache_enabled)
return false;
pages = get_nr_swap_pages();