linux-kernel - Re: [RFC][PATCH v3 12/22] mm, mn10300: add gfp flags variant of pte allocations

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Date:	Fri, 18 Mar 2011 20:00:45 +0000
From:	Prasad Joshi <prasadjoshi124@...il.com>
To:	dhowells@...hat.com, yasutake.koichi@...panasonic.com,
	linux-am33-list@...hat.com, linux-kernel@...r.kernel.org,
	prasadjoshi124@...il.com, mitra@...nfotech.com
Subject: Re: [RFC][PATCH v3 12/22] mm, mn10300: add gfp flags variant of
 pte allocations


- Added __pte_alloc_one_kernel to allocate page using specified GFP flag

- Changed pte_alloc_one_kernel to call __pte_alloc_one_kernel using
  GFP_KERNEL | __GFP_REPEAT allocation flags

- Helps in fixing the Bug 30702

Signed-off-by: Prasad Joshi <prasadjoshi124@...il.com>
Signed-off-by: Anand Mitra <mitra@...nfotech.com>
---
 arch/mn10300/include/asm/pgalloc.h |    2 ++
 arch/mn10300/mm/pgtable.c          |   10 ++++++++--
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/arch/mn10300/include/asm/pgalloc.h b/arch/mn10300/include/asm/pgalloc.h
index 146bacf..35150ae 100644
--- a/arch/mn10300/include/asm/pgalloc.h
+++ b/arch/mn10300/include/asm/pgalloc.h
@@ -37,6 +37,8 @@ extern pgd_t *pgd_alloc(struct mm_struct *);
 extern void pgd_free(struct mm_struct *, pgd_t *);
 
 extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
+extern pte_t *__pte_alloc_one_kernel(struct mm_struct *, unsigned long, gfp_t);
+
 extern struct page *pte_alloc_one(struct mm_struct *, unsigned long);
 
 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
diff --git a/arch/mn10300/mm/pgtable.c b/arch/mn10300/mm/pgtable.c
index 450f7ba..05077b4 100644
--- a/arch/mn10300/mm/pgtable.c
+++ b/arch/mn10300/mm/pgtable.c
@@ -62,14 +62,20 @@ void set_pmd_pfn(unsigned long vaddr, unsigned long pfn, pgprot_t flags)
 	local_flush_tlb_one(vaddr);
 }
 
-pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
+pte_t *__pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address, 
+		gfp_t gfp_mask)
 {
-	pte_t *pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT);
+	pte_t *pte = (pte_t *)__get_free_page(gfp_mask);
 	if (pte)
 		clear_page(pte);
 	return pte;
 }
 
+pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
+{
+	return __pte_alloc_one_kernel(mm, address, GFP_KERNEL | __GFP_REPEAT);
+}
+
 struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
 {
 	struct page *pte;
-- 
1.7.0.4

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