linux-kernel - [PATCH] ext4: delete redundant calculations in ext4_mb_get_buddy_page

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Message-Id: <20231023013416.17246-1-gouhao@uniontech.com>
Date:   Mon, 23 Oct 2023 09:34:16 +0800
From:   Gou Hao <gouhao@...ontech.com>
To:     tytso@....edu, adilger.kernel@...ger.ca, jack@...e.cz,
        linux-ext4@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, gouhaojake@....com
Subject: [PATCH] ext4: delete redundant calculations in ext4_mb_get_buddy_page_lock()

'blocks_per_page' is always 1 after 'if (blocks_per_page >= 2)',
'pnum' and 'block' is equal in this case.

Signed-off-by: Gou Hao <gouhao@...ontech.com>
Signed-off-by: Gou Hao <gouhaojake@....com>
---
 fs/ext4/mballoc.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 454d5612641e..8442f5474b25 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -1456,9 +1456,7 @@ static int ext4_mb_get_buddy_page_lock(struct super_block *sb,
 		return 0;
 	}
 
-	block++;
-	pnum = block / blocks_per_page;
-	page = find_or_create_page(inode->i_mapping, pnum, gfp);
+	page = find_or_create_page(inode->i_mapping, ++block, gfp);
 	if (!page)
 		return -ENOMEM;
 	BUG_ON(page->mapping != inode->i_mapping);
-- 
2.34.1