linux-kernel - [PATCH v2 9/9] ext4: clean up s_mb_rb_lock to fix build warnings with C=1

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Message-ID: <20240227091148.178435-10-libaokun1@huawei.com>
Date: Tue, 27 Feb 2024 17:11:48 +0800
From: Baokun Li <libaokun1@...wei.com>
To: <linux-ext4@...r.kernel.org>
CC: <tytso@....edu>, <adilger.kernel@...ger.ca>, <jack@...e.cz>,
	<ritesh.list@...il.com>, <ojaswin@...ux.ibm.com>, <adobriyan@...il.com>,
	<linux-kernel@...r.kernel.org>, <yi.zhang@...wei.com>,
	<yangerkun@...wei.com>, <libaokun1@...wei.com>
Subject: [PATCH v2 9/9] ext4: clean up s_mb_rb_lock to fix build warnings with C=1

Running sparse (make C=1) on mballoc.c we get the following warning:

 fs/ext4/mballoc.c:3194:13: warning: context imbalance in
  'ext4_mb_seq_structs_summary_start' - wrong count at exit

This is because __acquires(&EXT4_SB(sb)->s_mb_rb_lock) was called in
ext4_mb_seq_structs_summary_start(), but s_mb_rb_lock was removed in commit
83e80a6e3543 ("ext4: use buckets for cr 1 block scan instead of rbtree"),
so remove the __acquires to silence the warning.

Signed-off-by: Baokun Li <libaokun1@...wei.com>
---
 fs/ext4/mballoc.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 7ad089df2408..7ae8e04d6ef4 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -3192,7 +3192,6 @@ int ext4_seq_mb_stats_show(struct seq_file *seq, void *offset)
 }
 
 static void *ext4_mb_seq_structs_summary_start(struct seq_file *seq, loff_t *pos)
-__acquires(&EXT4_SB(sb)->s_mb_rb_lock)
 {
 	struct super_block *sb = pde_data(file_inode(seq->file));
 	unsigned long position;
-- 
2.31.1