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
diff --git a/include/linux/futex.h b/include/linux/futex.h
index 7c5b694..f36bfd2 100644
--- a/include/linux/futex.h
+++ b/include/linux/futex.h
@@ -54,7 +54,6 @@ union futex_key {
#ifdef CONFIG_FUTEX
extern void exit_robust_list(struct task_struct *curr);
-extern void exit_pi_state_list(struct task_struct *curr);
#ifdef CONFIG_HAVE_FUTEX_CMPXCHG
#define futex_cmpxchg_enabled 1
#else
@@ -64,8 +63,14 @@ extern int futex_cmpxchg_enabled;
static inline void exit_robust_list(struct task_struct *curr)
{
}
+#endif
+
+#ifdef CONFIG_FUTEX_PI
+extern void exit_pi_state_list(struct task_struct *curr);
+#else
static inline void exit_pi_state_list(struct task_struct *curr)
{
}
#endif
+
#endif