linux-kernel - [PATCH] mm/slab_common: use helper function is_power_of

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Date:   Thu, 17 Feb 2022 17:16:09 +0800
From:   Miaohe Lin <linmiaohe@...wei.com>
To:     <akpm@...ux-foundation.org>, <cl@...ux.com>, <penberg@...nel.org>,
        <rientjes@...gle.com>, <iamjoonsoo.kim@....com>, <vbabka@...e.cz>
CC:     <linux-mm@...ck.org>, <linux-kernel@...r.kernel.org>,
        <linmiaohe@...wei.com>
Subject: [PATCH] mm/slab_common: use helper function is_power_of_2()

Use helper function is_power_of_2() to check if KMALLOC_MIN_SIZE is power
of two. Minor readability improvement.

Signed-off-by: Miaohe Lin <linmiaohe@...wei.com>
---
 mm/slab_common.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/slab_common.c b/mm/slab_common.c
index 23f2ab0713b7..6ee64d6208b3 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -807,7 +807,7 @@ void __init setup_kmalloc_cache_index_table(void)
 	unsigned int i;
 
 	BUILD_BUG_ON(KMALLOC_MIN_SIZE > 256 ||
-		(KMALLOC_MIN_SIZE & (KMALLOC_MIN_SIZE - 1)));
+		!is_power_of_2(KMALLOC_MIN_SIZE));
 
 	for (i = 8; i < KMALLOC_MIN_SIZE; i += 8) {
 		unsigned int elem = size_index_elem(i);
-- 
2.23.0