From: Alexey Romanov Date: Thu, 11 Aug 2022 15:37:55 +0000 (+0300) Subject: zsmalloc: remove unnecessary size_class NULL check X-Git-Tag: v6.1-rc1~21^2~557 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=f24263a5a076dae41f3718f368df4fd8bf35888b;p=linux-block.git zsmalloc: remove unnecessary size_class NULL check pool->size_class array elements can't be NULL, so this check is not needed. In the whole code, we assign pool->size_class[i] values that are not NULL. Releasing memory for these values occurs in the zs_destroy_pool() function, which also releases and destroys the pool. In addition, in the zs_stats_size_show() and async_free_zspage(), with similar iterations over the array, we don't check it for NULL pointer. Link: https://lkml.kernel.org/r/20220811153755.16102-3-avromanov@sberdevices.ru Signed-off-by: Alexey Romanov Reviewed-by: Sergey Senozhatsky Cc: Minchan Kim Cc: Nitin Gupta Signed-off-by: Andrew Morton --- diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c index 09ab91a3fa3f..7b3bffc06078 100644 --- a/mm/zsmalloc.c +++ b/mm/zsmalloc.c @@ -2110,8 +2110,6 @@ unsigned long zs_compact(struct zs_pool *pool) for (i = ZS_SIZE_CLASSES - 1; i >= 0; i--) { class = pool->size_class[i]; - if (!class) - continue; if (class->index != i) continue; pages_freed += __zs_compact(pool, class); @@ -2156,8 +2154,6 @@ static unsigned long zs_shrinker_count(struct shrinker *shrinker, for (i = ZS_SIZE_CLASSES - 1; i >= 0; i--) { class = pool->size_class[i]; - if (!class) - continue; if (class->index != i) continue; @@ -2315,9 +2311,6 @@ void zs_destroy_pool(struct zs_pool *pool) int fg; struct size_class *class = pool->size_class[i]; - if (!class) - continue; - if (class->index != i) continue;