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From: Jules Irenge <jbi.octave@gmail.com>
To: linux-kernel@vger.kernel.org
Cc: boqun.feng@gmail.com, Luis Chamberlain <mcgrof@kernel.org>,
	Kees Cook <keescook@chromium.org>,
	Iurii Zaikin <yzaikin@google.com>,
	Alexey Dobriyan <adobriyan@gmail.com>,
	linux-fsdevel@vger.kernel.org (open list:PROC SYSCTL)
Subject: [PATCH 4/7] sysctl: Add missing annotation for start_unregistering()
Date: Tue, 31 Mar 2020 21:46:40 +0100	[thread overview]
Message-ID: <20200331204643.11262-5-jbi.octave@gmail.com> (raw)
In-Reply-To: <20200331204643.11262-1-jbi.octave@gmail.com>

Sparse reports a warning at start_unregistering()

warning: context imbalance in start_unregistering()
	- unexpected unlock

The root cause is the missing annotation at start_unregistering()
Add the missing __must_hold(&sysctl_lock) annotation.

Signed-off-by: Jules Irenge <jbi.octave@gmail.com>
---
 fs/proc/proc_sysctl.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index c75bb4632ed1..d1b5e2b35564 100644
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -307,6 +307,7 @@ static void proc_sys_prune_dcache(struct ctl_table_header *head)
 
 /* called under sysctl_lock, will reacquire if has to wait */
 static void start_unregistering(struct ctl_table_header *p)
+	__must_hold(&sysctl_lock)
 {
 	/*
 	 * if p->used is 0, nobody will ever touch that entry again;
-- 
2.24.1


  parent reply	other threads:[~2020-03-31 20:47 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <0/7>
2020-03-31 20:46 ` [PATCH 0/7] Lock warnings cleanup Jules Irenge
2020-03-31 20:46   ` [PATCH 1/7] fs: Add missing annotation for iput_final() Jules Irenge
2020-03-31 20:46   ` [PATCH 2/7] fsnotify: Add missing annotation for fsnotify_finish_user_wait() Jules Irenge
2020-04-01  9:24     ` Jan Kara
2020-04-03 16:15       ` Jules Irenge
2020-04-03 16:52         ` Jan Kara
2020-03-31 20:46   ` [PATCH 3/7] dax: Add missing annotation for wait_entry_unlocked() Jules Irenge
2020-04-01 10:01     ` Jan Kara
2020-04-01 16:04       ` Jules Irenge
2020-03-31 20:46   ` Jules Irenge [this message]
2020-04-02 16:06     ` [PATCH 4/7] sysctl: Add missing annotation for start_unregistering() Luis Chamberlain
2020-03-31 20:46   ` [PATCH 5/7] btrfs: Add missing annotation for btrfs_lock_cluster() Jules Irenge
2020-04-01 15:57     ` David Sterba
2020-03-31 20:46   ` [PATCH 6/7] btrfs: Add missing annotation for btrfs_tree_lock() Jules Irenge
2020-03-31 20:46   ` [PATCH 7/7] tty: serial_core: Add missing annotation for _unlock_and_check_sysrq() Jules Irenge
2020-04-16 13:58     ` Greg Kroah-Hartman

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