The patch titled
Subject: mm/zsmalloc.c: combine two atomic ops in zs_pool_dec_isolated()
has been removed from the -mm tree. Its filename was
mm-zsmallocc-combine-two-atomic-ops-in-zs_pool_dec_isolated.patch
This patch was dropped because an updated version will be merged
------------------------------------------------------
From: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Subject: mm/zsmalloc.c: combine two atomic ops in zs_pool_dec_isolated()
atomic_long_dec_and_test() is equivalent to atomic_long_dec() and
atomic_long_read() == 0. Use it to make code more succinct.
Link: https://lkml.kernel.org/r/20210624123930.1769093-3-linmiaohe@xxxxxxxxxx
Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Cc: Nitin Gupta <ngupta@xxxxxxxxxx>
Cc: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/zsmalloc.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
--- a/mm/zsmalloc.c~mm-zsmallocc-combine-two-atomic-ops-in-zs_pool_dec_isolated
+++ a/mm/zsmalloc.c
@@ -1828,14 +1828,13 @@ static void putback_zspage_deferred(stru
static inline void zs_pool_dec_isolated(struct zs_pool *pool)
{
VM_BUG_ON(atomic_long_read(&pool->isolated_pages) <= 0);
- atomic_long_dec(&pool->isolated_pages);
/*
* Checking pool->destroying must happen after atomic_long_dec()
* for pool->isolated_pages above. Paired with the smp_mb() in
* zs_unregister_migration().
*/
smp_mb__after_atomic();
- if (atomic_long_read(&pool->isolated_pages) == 0 && pool->destroying)
+ if (atomic_long_dec_and_test(&pool->isolated_pages) && pool->destroying)
wake_up_all(&pool->migration_wait);
}
_
Patches currently in -mm which might be from linmiaohe@xxxxxxxxxx are
mm-page_allocc-remove-meaningless-vm_bug_on-in-pindex_to_order.patch
mm-page_allocc-simplify-the-code-by-using-macro-k.patch
mm-page_allocc-fix-obsolete-comment-in-free_pcppages_bulk.patch
mm-page_allocc-use-helper-function-zone_spans_pfn.patch
mm-page_allocc-avoid-allocating-highmem-pages-via-alloc_pages_exact.patch
mm-page_isolation-fix-potential-missing-call-to-unset_migratetype_isolate.patch
mm-page_isolation-guard-against-possible-putback-unisolated-page.patch
mm-zsmallocc-close-race-window-between-zs_pool_dec_isolated-and-zs_unregister_migration.patch
