[Xenomai-core] [PATCH 2/3] RTDM: Instrument rtdm_lock_get for proper use

[Jan Kiszka <jan.kiszka@domain.hid>]

In case the user thinks rtdm_lock_get could be used like spin_lock or
messes up the IRQ protection for other reasons, catch this with a
XENO_BUGON.

Signed-off-by: Jan Kiszka <jan.kiszka@domain.hid>
---

 include/rtdm/rtdm_driver.h |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/include/rtdm/rtdm_driver.h b/include/rtdm/rtdm_driver.h
index 058a9f8..fe42eea 100644
--- a/include/rtdm/rtdm_driver.h
+++ b/include/rtdm/rtdm_driver.h
@@ -655,7 +655,15 @@ typedef unsigned long rtdm_lockctx_t;
  *
  * Rescheduling: never.
  */
+#ifdef DOXYGEN_CPP /* Beautify doxygen output */
 #define rtdm_lock_get(lock)	rthal_spin_lock(lock)
+#else /* This is how it really works */
+#define rtdm_lock_get(lock)					\
+	do {							\
+		XENO_BUGON(RTDM, rthal_local_irq_test());	\
+		rthal_spin_lock(lock);				\
+	} while (0)
+#endif
 
 /**
  * Release lock without preemption restoration