linux-kernel - [PATCHv2 21/59] mm/page_ext: Export lookup_page

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Message-Id: <20190731150813.26289-22-kirill.shutemov@linux.intel.com>
Date:   Wed, 31 Jul 2019 18:07:35 +0300
From:   "Kirill A. Shutemov" <kirill@...temov.name>
To:     Andrew Morton <akpm@...ux-foundation.org>, x86@...nel.org,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>, Borislav Petkov <bp@...en8.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Andy Lutomirski <luto@...capital.net>,
        David Howells <dhowells@...hat.com>
Cc:     Kees Cook <keescook@...omium.org>,
        Dave Hansen <dave.hansen@...el.com>,
        Kai Huang <kai.huang@...ux.intel.com>,
        Jacob Pan <jacob.jun.pan@...ux.intel.com>,
        Alison Schofield <alison.schofield@...el.com>,
        linux-mm@...ck.org, kvm@...r.kernel.org, keyrings@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Subject: [PATCHv2 21/59] mm/page_ext: Export lookup_page_ext() symbol

page_keyid() is inline funcation that uses lookup_page_ext(). KVM is
going to use page_keyid() and since KVM can be built as a module
lookup_page_ext() has to be exported.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
---
 mm/page_ext.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/mm/page_ext.c b/mm/page_ext.c
index c52b77c13cd9..eeca218891e7 100644
--- a/mm/page_ext.c
+++ b/mm/page_ext.c
@@ -139,6 +139,7 @@ struct page_ext *lookup_page_ext(const struct page *page)
 					MAX_ORDER_NR_PAGES);
 	return get_entry(base, index);
 }
+EXPORT_SYMBOL_GPL(lookup_page_ext);
 
 static int __init alloc_node_page_ext(int nid)
 {
@@ -209,6 +210,7 @@ struct page_ext *lookup_page_ext(const struct page *page)
 		return NULL;
 	return get_entry(section->page_ext, pfn);
 }
+EXPORT_SYMBOL_GPL(lookup_page_ext);
 
 static void *__meminit alloc_page_ext(size_t size, int nid)
 {
-- 
2.21.0