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[2.102.13.223]) by smtp.googlemail.com with ESMTPSA id y12sm8660782wmj.6.2020.02.14.12.48.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 14 Feb 2020 12:48:38 -0800 (PST) From: Jules Irenge To: linux-kernel@vger.kernel.org Cc: boqun.feng@gmail.com, Jules Irenge , Mike Kravetz , Andrew Morton , linux-mm@kvack.org (open list:HUGETLB FILESYSTEM) Subject: [PATCH 06/30] mm/hugetlb: Add missing annotation for gather_surplus_pages() Date: Fri, 14 Feb 2020 20:47:17 +0000 Message-Id: <20200214204741.94112-7-jbi.octave@gmail.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200214204741.94112-1-jbi.octave@gmail.com> References: <0/30> <20200214204741.94112-1-jbi.octave@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000007, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Sparse reports a warning at gather_surplus_pages() warning: context imbalance in hugetlb_cow() - unexpected unlock The root cause is the missing annotation at gather_surplus_pages() Add the missing __must_hold(&hugetlb_lock) Signed-off-by: Jules Irenge --- mm/hugetlb.c | 1 + 1 file changed, 1 insertion(+) diff --git a/mm/hugetlb.c b/mm/hugetlb.c index dd8737a94bec..ff7dda27b33f 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -1695,6 +1695,7 @@ struct page *alloc_huge_page_vma(struct hstate *h, = struct vm_area_struct *vma, * of size 'delta'. */ static int gather_surplus_pages(struct hstate *h, int delta) + __must_hold(&hugetlb_lock) { struct list_head surplus_list; struct page *page, *tmp; --=20 2.24.1