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| author | Zhen Lei <thunder.leizhen@huawei.com> | 2020-08-06 23:20:08 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-08-07 11:33:23 -0700 |
| commit | d69a9575f57ef742df599f1186dcbfb28af0f846 (patch) | |
| tree | 95d44b130d6800e2b9b83900b3b9709ffe3b5819 /mm/swap_slots.c | |
| parent | f90eae2a0f8ec43081c2d590004da9dd55a64791 (diff) | |
| download | linux-d69a9575f57ef742df599f1186dcbfb28af0f846.tar.bz2 | |
mm/swap_slots.c: simplify enable_swap_slots_cache()
Whether swap_slot_cache_initialized is true or false,
__reenable_swap_slots_cache() is always called. To make this meaning
clear, leave only one call to __reenable_swap_slots_cache(). This also
make it clearer what extra needs be done when swap_slot_cache_initialized
is false.
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/20200430061143.450-3-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 | 22 |
1 files changed, 10 insertions, 12 deletions
diff --git a/mm/swap_slots.c b/mm/swap_slots.c index 01609b5f0c55..b40394473a3c 100644 --- a/mm/swap_slots.c +++ b/mm/swap_slots.c @@ -240,21 +240,19 @@ static int free_slot_cache(unsigned int cpu) int enable_swap_slots_cache(void) { - int ret = 0; - mutex_lock(&swap_slots_cache_enable_mutex); - if (swap_slot_cache_initialized) { - __reenable_swap_slots_cache(); - goto out_unlock; - } + if (!swap_slot_cache_initialized) { + int ret; - ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "swap_slots_cache", - alloc_swap_slot_cache, free_slot_cache); - if (WARN_ONCE(ret < 0, "Cache allocation failed (%s), operating " - "without swap slots cache.\n", __func__)) - goto out_unlock; + ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "swap_slots_cache", + alloc_swap_slot_cache, free_slot_cache); + if (WARN_ONCE(ret < 0, "Cache allocation failed (%s), operating " + "without swap slots cache.\n", __func__)) + goto out_unlock; + + swap_slot_cache_initialized = true; + } - swap_slot_cache_initialized = true; __reenable_swap_slots_cache(); out_unlock: mutex_unlock(&swap_slots_cache_enable_mutex); |