[PATCH 3/3] mm/hugetlb: Assert hugetlb_lock in __hugetlb_cgroup_commit_charge

From: Peter Xu <peterx@redhat.com>
To: linux-mm@kvack.org, linux-kernel@vger.kernel.org
Cc: peterx@redhat.com, David Hildenbrand <david@redhat.com>,
	Mina Almasry <almasrymina@google.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Muchun Song <muchun.song@linux.dev>,
	David Rientjes <rientjes@google.com>
Subject: [PATCH 3/3] mm/hugetlb: Assert hugetlb_lock in __hugetlb_cgroup_commit_charge
Date: Wed, 17 Apr 2024 17:18:36 -0400	[thread overview]
Message-ID: <20240417211836.2742593-4-peterx@redhat.com> (raw)
In-Reply-To: <20240417211836.2742593-1-peterx@redhat.com>

This is similar to __hugetlb_cgroup_uncharge_folio() where it relies on
holding hugetlb_lock.  Add the similar assertion like the other one, since
it looks like such things may help some day.

Signed-off-by: Peter Xu <peterx@redhat.com>
---
 mm/hugetlb_cgroup.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/hugetlb_cgroup.c b/mm/hugetlb_cgroup.c
index aa4486bd3904..e20339a346b9 100644
--- a/mm/hugetlb_cgroup.c
+++ b/mm/hugetlb_cgroup.c
@@ -308,7 +308,7 @@ static void __hugetlb_cgroup_commit_charge(int idx, unsigned long nr_pages,
 {
 	if (hugetlb_cgroup_disabled() || !h_cg)
 		return;
-
+	lockdep_assert_held(&hugetlb_lock);
 	__set_hugetlb_cgroup(folio, h_cg, rsvd);
 	if (!rsvd) {
 		unsigned long usage =
-- 
2.44.0

