Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
IronPort-SDR: Sxvg+RtMv0jpRvxACUOU6MEBwmFu+8toIb29UzNpVQeVvSzZZzxcIehKDCDSbdW0CHuAs0dDIC
 ywzlBB6RzJdA==
From:   SeongJae Park <sjpark@amazon.com>
To:     <akpm@linux-foundation.org>
CC:     SeongJae Park <sjpark@amazon.de>, <Jonathan.Cameron@Huawei.com>,
        <aarcange@redhat.com>, <acme@kernel.org>,
        <alexander.shishkin@linux.intel.com>, <amit@kernel.org>,
        <benh@kernel.crashing.org>, <brendan.d.gregg@gmail.com>,
        <brendanhiggins@google.com>, <cai@lca.pw>,
        <colin.king@canonical.com>, <corbet@lwn.net>, <david@redhat.com>,
        <dwmw@amazon.com>, <foersleo@amazon.de>, <irogers@google.com>,
        <jolsa@redhat.com>, <kirill@shutemov.name>, <mark.rutland@arm.com>,
        <mgorman@suse.de>, <minchan@kernel.org>, <mingo@redhat.com>,
        <namhyung@kernel.org>, <peterz@infradead.org>,
        <rdunlap@infradead.org>, <riel@surriel.com>, <rientjes@google.com>,
        <rostedt@goodmis.org>, <rppt@kernel.org>, <sblbir@amazon.com>,
        <shakeelb@google.com>, <shuah@kernel.org>, <sj38.park@gmail.com>,
        <snu@amazon.de>, <vbabka@suse.cz>, <vdavydov.dev@gmail.com>,
        <yang.shi@linux.alibaba.com>, <ying.huang@intel.com>,
        <linux-damon@amazon.com>, <linux-mm@kvack.org>,
        <linux-doc@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: [RFC v5 06/11] mm/rmap: Export essential functions for rmap_run
Date:   Tue, 7 Jul 2020 16:45:35 +0200
Message-ID: <20200707144540.21216-7-sjpark@amazon.com>
In-Reply-To: <20200707144540.21216-1-sjpark@amazon.com>
References: <20200707144540.21216-1-sjpark@amazon.com>
MIME-Version: 1.0
Content-Type: text/plain
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

From: SeongJae Park <sjpark@amazon.de>

This commit exports the three essential functions for ramp walk,
'page_lock_anon_vma_read()', 'rmap_walk()', and 'page_rmapping()', to
GPL modules.  Those will be used by DAMON for the physical memory
address based access monitoring in the following commit.

Signed-off-by: SeongJae Park <sjpark@amazon.de>
---
 mm/rmap.c | 2 ++
 mm/util.c | 1 +
 2 files changed, 3 insertions(+)

diff --git a/mm/rmap.c b/mm/rmap.c
index f79a206b271a..20ac37b27a7d 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -579,6 +579,7 @@ struct anon_vma *page_lock_anon_vma_read(struct page *page)
 	rcu_read_unlock();
 	return anon_vma;
 }
+EXPORT_SYMBOL_GPL(page_lock_anon_vma_read);
 
 void page_unlock_anon_vma_read(struct anon_vma *anon_vma)
 {
@@ -1934,6 +1935,7 @@ void rmap_walk(struct page *page, struct rmap_walk_control *rwc)
 	else
 		rmap_walk_file(page, rwc, false);
 }
+EXPORT_SYMBOL_GPL(rmap_walk);
 
 /* Like rmap_walk, but caller holds relevant rmap lock */
 void rmap_walk_locked(struct page *page, struct rmap_walk_control *rwc)
diff --git a/mm/util.c b/mm/util.c
index 988d11e6c17c..1df32546fe28 100644
--- a/mm/util.c
+++ b/mm/util.c
@@ -620,6 +620,7 @@ void *page_rmapping(struct page *page)
 	page = compound_head(page);
 	return __page_rmapping(page);
 }
+EXPORT_SYMBOL_GPL(page_rmapping);
 
 /*
  * Return true if this page is mapped into pagetables.
-- 
2.17.1