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    Subject[patch 23/50] locking/rtmutex: Include only rbtree types
    From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

    rtmutex.h needs the definition of struct rb_root_cached. rbtree.h includes
    kernel.h which includes spinlock.h. That works nicely for non-RT enabled
    kernels, but on RT enabled kernels spinlocks are based on rtmutexes which
    creates another circular header dependency as spinlocks.h will require
    rtmutex.h.

    Include rbtree_types.h instead.

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
    Signed-off-by: Thomas Gleixner <tglx@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 9c1c67f2d810..7bbee67720dc 100644
    --- a/include/linux/rtmutex.h
    +++ b/include/linux/rtmutex.h
    @@ -14,7 +14,7 @@
    #define __LINUX_RT_MUTEX_H

    #include <linux/linkage.h>
    -#include <linux/rbtree.h>
    +#include <linux/rbtree_types.h>
    #include <linux/spinlock_types_raw.h>

    extern int max_lock_depth; /* for sysctl */
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