From e57d143091f1c0b1a98140a4d2e63e113afb62c0 Mon Sep 17 00:00:00 2001
From: Peter Zijlstra <peterz@infradead.org>
Date: Thu, 8 Aug 2019 08:47:14 +0200
Subject: mutex: Fix up mutex_waiter usage
The patch moving bits into mutex.c was a little too much; by also
moving struct mutex_waiter a few less common CONFIGs would no longer
build.
Fixes: 5f35d5a66b3e ("locking/mutex: Make __mutex_owner static to mutex.c")
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
include/linux/mutex.h | 13 +++++++++++++
1 file changed, 13 insertions(+)
(limited to 'include')
diff --git a/include/linux/mutex.h b/include/linux/mutex.h
index eb8c62aba263..aca8f36dfac9 100644
--- a/include/linux/mutex.h
+++ b/include/linux/mutex.h
@@ -65,6 +65,19 @@ struct mutex {
#endif
};
+/*
+ * This is the control structure for tasks blocked on mutex,
+ * which resides on the blocked task's kernel stack:
+ */
+struct mutex_waiter {
+ struct list_head list;
+ struct task_struct *task;
+ struct ww_acquire_ctx *ww_ctx;
+#ifdef CONFIG_DEBUG_MUTEXES
+ void *magic;
+#endif
+};
+
#ifdef CONFIG_DEBUG_MUTEXES
#define __DEBUG_MUTEX_INITIALIZER(lockname) \
--
cgit v1.2.3-70-g09d2