From: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Date: Thu, 14 Nov 2013 22:31:25 +0000 (-0800)
Subject: arc: handle pgtable_page_ctor() fail
X-Git-Tag: accepted/tizen/common/20141203.182822~1120^2~49
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ca6ec3bbaaaf5941e970314a2eb3680b9e7e698a;p=platform%2Fkernel%2Flinux-arm64.git

arc: handle pgtable_page_ctor() fail

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Vineet Gupta <vgupta@synopsys.com> [for arch/arc bits]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/arch/arc/include/asm/pgalloc.h b/arch/arc/include/asm/pgalloc.h
index 36a9f20..81208bfd 100644
--- a/arch/arc/include/asm/pgalloc.h
+++ b/arch/arc/include/asm/pgalloc.h
@@ -105,11 +105,16 @@ static inline pgtable_t
 pte_alloc_one(struct mm_struct *mm, unsigned long address)
 {
 	pgtable_t pte_pg;
+	struct page *page;
 
 	pte_pg = __get_free_pages(GFP_KERNEL | __GFP_REPEAT, __get_order_pte());
-	if (pte_pg) {
-		memzero((void *)pte_pg, PTRS_PER_PTE * 4);
-		pgtable_page_ctor(virt_to_page(pte_pg));
+	if (!pte_pg)
+		return 0;
+	memzero((void *)pte_pg, PTRS_PER_PTE * 4);
+	page = virt_to_page(pte_pg);
+	if (!pgtable_page_ctor(page)) {
+		__free_page(page);
+		return 0;
 	}
 
 	return pte_pg;