[077/166] mm/compaction: add missing annotation for compact_lock_irqsave

Commit Message

Andrew Morton April 7, 2020, 3:08 a.m. UTC

From: Jules Irenge <[e-mail]>
Subject: mm/compaction: add missing annotation for compact_lock_irqsave

Sparse reports a warning at compact_lock_irqsave()

warning: context imbalance in compact_lock_irqsave() - wrong count at exit

The root cause is the missing annotation at compact_lock_irqsave()
Add the missing __acquires(lock) annotation.

Link: http://lkml.kernel.org/r/[e-mail]
Signed-off-by: Jules Irenge <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
---

 mm/compaction.c |    1 +
 1 file changed, 1 insertion(+)

Patch

--- a/mm/compaction.c~mm-compaction-add-missing-annotation-for-compact_lock_irqsave
+++ a/mm/compaction.c
@@ -481,6 +481,7 @@  static bool test_and_set_skip(struct com
  */
 static bool compact_lock_irqsave(spinlock_t *lock, unsigned long *flags,
 						struct compact_control *cc)
+	__acquires(lock)
 {
 	/* Track if the lock is contended in async mode */
 	if (cc->mode == MIGRATE_ASYNC && !cc->contended) {