[IA64] virt_to_page() can be called with NULL arg

It does not return NULL when arg is NULL.

Signed-off-by: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Signed-off-by: Kirill Korotaev <dev@openvz.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>

diff --git a/include/asm-ia64/pgalloc.h b/include/asm-ia64/pgalloc.h
index 393e04c42a2c127affc71db782b51214221e0934..560c287b12330c4e4f35860297a13f28c874a52b 100644 (file)
--- a/include/asm-ia64/pgalloc.h
+++ b/include/asm-ia64/pgalloc.h
@@ -137,7 +137,8 @@ pmd_populate_kernel(struct mm_struct *mm, pmd_t * pmd_entry, pte_t * pte)
 static inline struct page *pte_alloc_one(struct mm_struct *mm,
                                         unsigned long addr)
 {
-       return virt_to_page(pgtable_quicklist_alloc());
+       void *pg = pgtable_quicklist_alloc();
+       return pg ? virt_to_page(pg) : NULL;
 }
 
 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,