[PATCH 12 of 18] x86/mm: Make page_lock/unlock() in arch/x86/mm.c externally callable

[Andres Lagar-Cavilla <andres@lagarcavilla.org>]

 xen/arch/x86/mm.c        |  4 ++--
 xen/include/asm-x86/mm.h |  3 +++
 2 files changed, 5 insertions(+), 2 deletions(-)


This is necessary for a new consumer of page_lock/unlock to follow in
the series.

Signed-off-by: Andres Lagar-Cavilla <andres@lagarcavilla.org>

diff -r cde3529132c1 -r ecf95feef9ac xen/arch/x86/mm.c
--- a/xen/arch/x86/mm.c
+++ b/xen/arch/x86/mm.c
@@ -1718,7 +1718,7 @@ static int free_l4_table(struct page_inf
 #define free_l4_table(page, preemptible) (-EINVAL)
 #endif
 
-static int page_lock(struct page_info *page)
+int page_lock(struct page_info *page)
 {
     unsigned long x, nx;
 
@@ -1735,7 +1735,7 @@ static int page_lock(struct page_info *p
     return 1;
 }
 
-static void page_unlock(struct page_info *page)
+void page_unlock(struct page_info *page)
 {
     unsigned long x, nx, y = page->u.inuse.type_info;
 
diff -r cde3529132c1 -r ecf95feef9ac xen/include/asm-x86/mm.h
--- a/xen/include/asm-x86/mm.h
+++ b/xen/include/asm-x86/mm.h
@@ -337,6 +337,9 @@ int is_iomem_page(unsigned long mfn);
 
 void clear_superpage_mark(struct page_info *page);
 
+int page_lock(struct page_info *page);
+void page_unlock(struct page_info *page);
+
 struct domain *page_get_owner_and_reference(struct page_info *page);
 void put_page(struct page_info *page);
 int  get_page(struct page_info *page, struct domain *domain);