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authorWei Yang <richard.weiyang@linux.alibaba.com>2020-04-02 07:06:16 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2020-04-02 19:35:27 +0300
commit2406b76fe815dbc7f97a19995b8d80eacc887895 (patch)
tree6b29743a8b0556347e9e188f7dbb4dd6d10359d7 /mm/swap_slots.c
parent218209487c3da2f6d861b236c11226b6eca7b7b7 (diff)
downloadlinux-2406b76fe815dbc7f97a19995b8d80eacc887895.tar.xz
mm/swap_slots.c: assign|reset cache slot by value directly
Currently we use a tmp pointer, pentry, to transfer and reset swap cache slot, which is a little redundant. Swap cache slot stores the entry value directly, assign and reset it by value would be straight forward. Also this patch merges the else and if, since this is the only case we refill and repeat swap cache. Signed-off-by: Wei Yang <richard.weiyang@linux.alibaba.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/20200311055352.50574-1-richard.weiyang@linux.alibaba.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/swap_slots.c')
-rw-r--r--mm/swap_slots.c12
1 files changed, 5 insertions, 7 deletions
diff --git a/mm/swap_slots.c b/mm/swap_slots.c
index 63a7b4563a57..0975adc72253 100644
--- a/mm/swap_slots.c
+++ b/mm/swap_slots.c
@@ -309,7 +309,7 @@ direct_free:
swp_entry_t get_swap_page(struct page *page)
{
- swp_entry_t entry, *pentry;
+ swp_entry_t entry;
struct swap_slots_cache *cache;
entry.val = 0;
@@ -336,13 +336,11 @@ swp_entry_t get_swap_page(struct page *page)
if (cache->slots) {
repeat:
if (cache->nr) {
- pentry = &cache->slots[cache->cur++];
- entry = *pentry;
- pentry->val = 0;
+ entry = cache->slots[cache->cur];
+ cache->slots[cache->cur++].val = 0;
cache->nr--;
- } else {
- if (refill_swap_slots_cache(cache))
- goto repeat;
+ } else if (refill_swap_slots_cache(cache)) {
+ goto repeat;
}
}
mutex_unlock(&cache->alloc_lock);