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Message-Id: <20230725185106.2147273-5-shikemeng@huaweicloud.com>
Date: Wed, 26 Jul 2023 02:51:00 +0800
From: Kemeng Shi <shikemeng@...weicloud.com>
To: tytso@....edu, adilger.kernel@...ger.ca, ritesh.list@...il.com,
ojaswin@...ux.ibm.com, linux-ext4@...r.kernel.org,
linux-kernel@...r.kernel.org
Cc: shikemeng@...weicloud.com
Subject: [PATCH v2 04/10] ext4: use is_power_of_2 helper in ext4_mb_regular_allocator
Use intuitive is_power_of_2 helper in ext4_mb_regular_allocator.
Signed-off-by: Kemeng Shi <shikemeng@...weicloud.com>
Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@...il.com>
---
fs/ext4/mballoc.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index bf309c4d686e..35c6224d453c 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -2794,10 +2794,7 @@ ext4_mb_regular_allocator(struct ext4_allocation_context *ac)
* requests upto maximum buddy size we have constructed.
*/
if (i >= sbi->s_mb_order2_reqs && i <= MB_NUM_ORDERS(sb)) {
- /*
- * This should tell if fe_len is exactly power of 2
- */
- if ((ac->ac_g_ex.fe_len & (~(1 << (i - 1)))) == 0)
+ if (is_power_of_2(ac->ac_g_ex.fe_len))
ac->ac_2order = array_index_nospec(i - 1,
MB_NUM_ORDERS(sb));
}
--
2.30.0
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