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| author | Zhen Lei <thunder.leizhen@huawei.com> | 2020-08-06 23:20:11 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-08-07 11:33:24 -0700 |
| commit | e0f3ebba97f190ce988829ccc5b527e8eef40e01 (patch) | |
| tree | 8de4841418c17557771fe40e07c0e8142d4f5efa /mm/swap_slots.c | |
| parent | d69a9575f57ef742df599f1186dcbfb28af0f846 (diff) | |
| download | linux-stable-e0f3ebba97f190ce988829ccc5b527e8eef40e01.tar.gz linux-stable-e0f3ebba97f190ce988829ccc5b527e8eef40e01.tar.bz2 linux-stable-e0f3ebba97f190ce988829ccc5b527e8eef40e01.zip | |
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.c | 5 |
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(); |