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mm/zsmalloc.c: improve readability for async_free_zspage()

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The class is extracted from pool->size_class[class_idx] again before
calling __free_zspage().  It looks like class will change after we fetch
the class lock.  But this is misleading as class will stay unchanged.

Link: https://lkml.kernel.org/r/20210624123930.1769093-4-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Nitin Gupta <ngupta@vflare.org>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Miaohe Lin 2021-06-30 18:53:04 -07:00 committed by Linus Torvalds
parent ce8475b6a4
commit 3384833726
1 changed files with 1 additions and 1 deletions
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mm/zsmalloc.c
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@ -2162,7 +2162,7 @@ static void async_free_zspage(struct work_struct *work)
VM_BUG_ON(fullness != ZS_EMPTY);
class = pool->size_class[class_idx];
spin_lock(&class->lock);
__free_zspage(pool, pool->size_class[class_idx], zspage);
__free_zspage(pool, class, zspage);
spin_unlock(&class->lock);
}
};