[PATCH 3/3] locking: Add lock context annotations in the spinlock implementation

[Bart Van Assche <bvanassche@acm.org>]

Make the spinlock implementation compatible with lock context analysis
(CONTEXT_ANALYSIS := 1) by adding lock context annotations to the
_raw_##op##_...() macros.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
---
 kernel/locking/spinlock.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/kernel/locking/spinlock.c b/kernel/locking/spinlock.c
index 7685defd7c52..b42d293da38b 100644
--- a/kernel/locking/spinlock.c
+++ b/kernel/locking/spinlock.c
@@ -64,8 +64,9 @@ EXPORT_PER_CPU_SYMBOL(__mmiowb_state);
  * time (making _this_ CPU preemptible if possible), and we also signal
  * towards that other CPU that it should break the lock ASAP.
  */
-#define BUILD_LOCK_OPS(op, locktype)					\
+#define BUILD_LOCK_OPS(op, locktype, lock_ctx_op)			\
 static void __lockfunc __raw_##op##_lock(locktype##_t *lock)		\
+	lock_ctx_op(lock)						\
 {									\
 	for (;;) {							\
 		preempt_disable();					\
@@ -78,6 +79,7 @@ static void __lockfunc __raw_##op##_lock(locktype##_t *lock)		\
 }									\
 									\
 static unsigned long __lockfunc __raw_##op##_lock_irqsave(locktype##_t *lock) \
+	lock_ctx_op(lock)						\
 {									\
 	unsigned long flags;						\
 									\
@@ -96,11 +98,13 @@ static unsigned long __lockfunc __raw_##op##_lock_irqsave(locktype##_t *lock) \
 }									\
 									\
 static void __lockfunc __raw_##op##_lock_irq(locktype##_t *lock)	\
+	lock_ctx_op(lock)						\
 {									\
 	_raw_##op##_lock_irqsave(lock);					\
 }									\
 									\
 static void __lockfunc __raw_##op##_lock_bh(locktype##_t *lock)		\
+	lock_ctx_op(lock)						\
 {									\
 	unsigned long flags;						\
 									\
@@ -123,11 +127,11 @@ static void __lockfunc __raw_##op##_lock_bh(locktype##_t *lock)		\
  *         __[spin|read|write]_lock_irqsave()
  *         __[spin|read|write]_lock_bh()
  */
-BUILD_LOCK_OPS(spin, raw_spinlock);
+BUILD_LOCK_OPS(spin, raw_spinlock, __acquires);
 
 #ifndef CONFIG_PREEMPT_RT
-BUILD_LOCK_OPS(read, rwlock);
-BUILD_LOCK_OPS(write, rwlock);
+BUILD_LOCK_OPS(read, rwlock, __acquires_shared);
+BUILD_LOCK_OPS(write, rwlock, __acquires);
 #endif
 
 #endif