linux-kernel - [PATCH 2/2] liblockdep: Stub task

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Message-ID: <20180828233752.GG18030@decadent.org.uk>
Date:   Wed, 29 Aug 2018 00:37:52 +0100
From:   Ben Hutchings <ben@...adent.org.uk>
To:     Sasha Levin <alexander.levin@...izon.com>
Cc:     linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] liblockdep: Stub task_struct::state

lockdep_print_held_locks() now checks task_struct::state.  Define it
so that all tasks are assumed to be running, since we have no
reasonble way to tell in user-space.

Fixes: 8cc05c71ba5f ("locking/lockdep: Move sanity check to inside ...")
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 tools/include/linux/lockdep.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tools/include/linux/lockdep.h b/tools/include/linux/lockdep.h
index 6b0c36a58fcb..8e84609afb04 100644
--- a/tools/include/linux/lockdep.h
+++ b/tools/include/linux/lockdep.h
@@ -31,12 +31,16 @@ struct task_struct {
 	gfp_t lockdep_reclaim_gfp;
 	int pid;
 	char comm[17];
+	long state;
 };
 
 extern struct task_struct *__curr(void);
 
 #define current (__curr())
 
+/* lockdep checks task_struct::state == TASK_RUNNING */
+#define TASK_RUNNING 0
+
 static inline int debug_locks_off(void)
 {
 	return 1;

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