linux-kernel - [PATCH 10/34] arc: handle pgtable_page

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Date:	Thu, 10 Oct 2013 21:05:35 +0300
From:	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	linux-arch@...r.kernel.org,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	Vineet Gupta <vgupta@...opsys.com>
Subject: [PATCH 10/34] arc: handle pgtable_page_ctor() fail

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
Cc: Vineet Gupta <vgupta@...opsys.com>
---
 arch/arc/include/asm/pgalloc.h | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/arch/arc/include/asm/pgalloc.h b/arch/arc/include/asm/pgalloc.h
index 36a9f20c21..81208bfd9d 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;
-- 
1.8.4.rc3

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