Add missing check for memory allocation fail.

Signed-off-by: Kirill A. Shutemov <kirill.shute...@linux.intel.com>
Cc: Mikael Starvik <star...@axis.com>
Cc: Jesper Nilsson <jesper.nils...@axis.com>
---
 arch/cris/include/asm/pgalloc.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/cris/include/asm/pgalloc.h b/arch/cris/include/asm/pgalloc.h
index 6da975db11..d9504d38c2 100644
--- a/arch/cris/include/asm/pgalloc.h
+++ b/arch/cris/include/asm/pgalloc.h
@@ -32,6 +32,8 @@ static inline pgtable_t pte_alloc_one(struct mm_struct *mm, 
unsigned long addres
 {
        struct page *pte;
        pte = alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0);
+       if (!pte)
+               return NULL;
        pgtable_page_ctor(pte);
        return pte;
 }
-- 
1.8.4.rc3

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