diff options
| author | Nicolas Pitre <nicolas.pitre@linaro.org> | 2017-08-01 00:31:32 -0400 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2017-08-01 14:36:35 +0200 |
| commit | bc2eecd7ecce40af43b6eb3d256b6076257df846 (patch) | |
| tree | d4189369c4484b144f9cb3d72455ac3a5207dd37 /kernel/locking | |
| parent | f06e8c584fa0d05312c11ea66194f3d2efb93c21 (diff) | |
futex: Allow for compiling out PI support
This makes it possible to preserve basic futex support and compile out the
PI support when RT mutexes are not available.
Signed-off-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Darren Hart <dvhart@infradead.org>
Link: http://lkml.kernel.org/r/alpine.LFD.2.20.1708010024190.5981@knanqh.ubzr
Diffstat (limited to 'kernel/locking')
| -rw-r--r-- | kernel/locking/rtmutex_common.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/kernel/locking/rtmutex_common.h b/kernel/locking/rtmutex_common.h index 72ad45a9a794..8d039b928d61 100644 --- a/kernel/locking/rtmutex_common.h +++ b/kernel/locking/rtmutex_common.h @@ -40,6 +40,9 @@ struct rt_mutex_waiter { /* * Various helpers to access the waiters-tree: */ + +#ifdef CONFIG_RT_MUTEXES + static inline int rt_mutex_has_waiters(struct rt_mutex *lock) { return !RB_EMPTY_ROOT(&lock->waiters); @@ -69,6 +72,32 @@ task_top_pi_waiter(struct task_struct *p) pi_tree_entry); } +#else + +static inline int rt_mutex_has_waiters(struct rt_mutex *lock) +{ + return false; +} + +static inline struct rt_mutex_waiter * +rt_mutex_top_waiter(struct rt_mutex *lock) +{ + return NULL; +} + +static inline int task_has_pi_waiters(struct task_struct *p) +{ + return false; +} + +static inline struct rt_mutex_waiter * +task_top_pi_waiter(struct task_struct *p) +{ + return NULL; +} + +#endif + /* * lock->owner state tracking: */ |