linux-kernel - [tip: locking/core] locking/rtmutex: Prevent future include recursion hell

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Date:   Tue, 17 Aug 2021 20:14:23 -0000
From:   "tip-bot2 for Sebastian Andrzej Siewior" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Ingo Molnar <mingo@...nel.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: locking/core] locking/rtmutex: Prevent future include recursion hell

The following commit has been merged into the locking/core branch of tip:

Commit-ID:     a403abbdc715986760821e67731d60ff65bde4bd
Gitweb:        https://git.kernel.org/tip/a403abbdc715986760821e67731d60ff65bde4bd
Author:        Sebastian Andrzej Siewior <bigeasy@...utronix.de>
AuthorDate:    Sun, 15 Aug 2021 23:28:16 +02:00
Committer:     Ingo Molnar <mingo@...nel.org>
CommitterDate: Tue, 17 Aug 2021 17:27:28 +02:00

locking/rtmutex: Prevent future include recursion hell

rtmutex only needs raw_spinlock_t, but it includes spinlock_types.h, which
is not a problem on an non RT enabled kernel.

RT kernels substitute regular spinlocks with 'sleeping' spinlocks, which
are based on rtmutexes, and therefore must be able to include rtmutex.h.

Include <linux/spinlock_types_raw.h> instead.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Signed-off-by: Ingo Molnar <mingo@...nel.org>
Link: https://lore.kernel.org/r/20210815211303.428224188@linutronix.de
---
 include/linux/rtmutex.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/rtmutex.h b/include/linux/rtmutex.h
index 174419e..4be97ae 100644
--- a/include/linux/rtmutex.h
+++ b/include/linux/rtmutex.h
@@ -16,7 +16,7 @@
 #include <linux/compiler.h>
 #include <linux/linkage.h>
 #include <linux/rbtree.h>
-#include <linux/spinlock_types.h>
+#include <linux/spinlock_types_raw.h>
 
 extern int max_lock_depth; /* for sysctl */