[082/166] mm/zsmalloc: add missing annotation for migrate_read_lock()

Commit Message

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

From: Jules Irenge <[e-mail]>
Subject: mm/zsmalloc: add missing annotation for migrate_read_lock()

Sparse reports a warning at migrate_read_lock()()

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

The root cause is the missing annotation at migrate_read_lock()
Add the missing __acquires(&zspage->lock) annotation

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

 mm/zsmalloc.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Patch

--- a/mm/zsmalloc.c~mm-zsmalloc-add-missing-annotation-for-migrate_read_lock
+++ a/mm/zsmalloc.c
@@ -1833,7 +1833,7 @@  static void migrate_lock_init(struct zsp
 	rwlock_init(&zspage->lock);
 }
 
-static void migrate_read_lock(struct zspage *zspage)
+static void migrate_read_lock(struct zspage *zspage) __acquires(&zspage->lock)
 {
 	read_lock(&zspage->lock);
 }