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Thu, 18 Mar 2021 04:08:48 -0700 (PDT) Received: from localhost.localdomain ([139.177.225.231]) by smtp.gmail.com with ESMTPSA id e21sm1779509pgv.74.2021.03.18.04.08.44 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Thu, 18 Mar 2021 04:08:47 -0700 (PDT) From: Muchun Song To: guro@fb.com, hannes@cmpxchg.org, mhocko@kernel.org, akpm@linux-foundation.org, shakeelb@google.com, vdavydov.dev@gmail.com Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, duanxiongchun@bytedance.com, Muchun Song Subject: [PATCH v4 5/5] mm: memcontrol: move PageMemcgKmem to the scope of CONFIG_MEMCG_KMEM Date: Thu, 18 Mar 2021 19:06:58 +0800 Message-Id: <20210318110658.60892-6-songmuchun@bytedance.com> X-Mailer: git-send-email 2.21.0 (Apple Git-122) In-Reply-To: <20210318110658.60892-1-songmuchun@bytedance.com> References: <20210318110658.60892-1-songmuchun@bytedance.com> MIME-Version: 1.0 X-Stat-Signature: zag9hfwjciacawhmqhzoaphgzai4zc8u X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 2BE2490009D6 Received-SPF: none (bytedance.com>: No applicable sender policy available) receiver=imf19; identity=mailfrom; envelope-from=""; helo=mail-pf1-f181.google.com; client-ip=209.85.210.181 X-HE-DKIM-Result: pass/pass X-HE-Tag: 1616065729-552528 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: The page only can be marked as kmem when CONFIG_MEMCG_KMEM is enabled. So move PageMemcgKmem() to the scope of the CONFIG_MEMCG_KMEM. As a bonus, on !CONFIG_MEMCG_KMEM build some code can be compiled out. Signed-off-by: Muchun Song Acked-by: Roman Gushchin Reviewed-by: Shakeel Butt Acked-by: Johannes Weiner --- include/linux/memcontrol.h | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index 395a113e4a3b..7fdc92e1983e 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -510,6 +510,7 @@ static inline struct mem_cgroup *page_memcg_check(str= uct page *page) return (struct mem_cgroup *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); } =20 +#ifdef CONFIG_MEMCG_KMEM /* * PageMemcgKmem - check if the page has MemcgKmem flag set * @page: a pointer to the page struct @@ -524,7 +525,6 @@ static inline bool PageMemcgKmem(struct page *page) return page->memcg_data & MEMCG_DATA_KMEM; } =20 -#ifdef CONFIG_MEMCG_KMEM /* * page_objcgs - get the object cgroups vector associated with a page * @page: a pointer to the page struct @@ -566,6 +566,11 @@ static inline struct obj_cgroup **page_objcgs_check(= struct page *page) } =20 #else +static inline bool PageMemcgKmem(struct page *page) +{ + return false; +} + static inline struct obj_cgroup **page_objcgs(struct page *page) { return NULL; --=20 2.11.0