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. Signed-off-by: Jules Irenge <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Linus Torvalds <[email protected]>
sudhin-joseph · Apr 7, 2020 · 77337ed · 77337ed
1 parent bb8b93b
commit 77337ed
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/mm/compaction.c b/mm/compaction.c
@@ -481,6 +481,7 @@ static bool test_and_set_skip(struct compact_control *cc, struct page *page,
  */
 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) {