linux-kernel - Re: [RFC][PATCH v3 16/22] mm, m32r: add gfp flags variant of pmd and pte allocations

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Message-ID: <20110318200452.GQ4746@prasad-kvm>
Date:	Fri, 18 Mar 2011 20:04:52 +0000
From:	Prasad Joshi <prasadjoshi124@...il.com>
To:	takata@...ux-m32r.org, linux-m32r@...linux-m32r.org,
	linux-m32r-ja@...linux-m32r.org, linux-kernel@...r.kernel.org,
	prasadjoshi124@...il.com, mitra@...nfotech.com
Subject: Re: [RFC][PATCH v3 16/22] mm, m32r: add gfp flags variant of pmd
 and pte allocations


- Added function __pmd_alloc_one which is same as pmd_alloc_one, but accepts
   an extra argument for gfp_t flag.

- Added function __pte_alloc_one_kernel to allocated zeroed page using
  allocation flag passed as an argument.

- Changed pte_alloc_one_kernel to call __pte_alloc_one_kernel using
  GFP_KERNEL allocation flag.

- Helps in fixing the Bug 30702

Signed-off-by: Prasad Joshi <prasadjoshi124@...il.com>
Signed-off-by: Anand Mitra <mitra@...nfotech.com>
---
 arch/m32r/include/asm/pgalloc.h |   11 ++++++++---
 1 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/arch/m32r/include/asm/pgalloc.h b/arch/m32r/include/asm/pgalloc.h
index 0fc7361..0c1e4ae 100644
--- a/arch/m32r/include/asm/pgalloc.h
+++ b/arch/m32r/include/asm/pgalloc.h
@@ -30,12 +30,16 @@ static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
 	free_page((unsigned long)pgd);
 }
 
+static __inline__ pte_t *__pte_alloc_one_kernel(struct mm_struct *mm,
+	unsigned long address, gfp_t gfp_mask)
+{
+	return (pte_t *)__get_free_page(gfp_mask | __GFP_ZERO);
+}
+
 static __inline__ pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
 	unsigned long address)
 {
-	pte_t *pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_ZERO);
-
-	return pte;
+	return __pte_alloc_one_kernel(mm, address, GFP_KERNEL);
 }
 
 static __inline__ pgtable_t pte_alloc_one(struct mm_struct *mm,
@@ -66,6 +70,7 @@ static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
  * (In the PAE case we free the pmds as part of the pgd.)
  */
 
+#define __pmd_alloc_one(mm, addr,mask)		({ BUG(); ((pmd_t *)2); })
 #define pmd_alloc_one(mm, addr)		({ BUG(); ((pmd_t *)2); })
 #define pmd_free(mm, x)			do { } while (0)
 #define __pmd_free_tlb(tlb, x, addr)	do { } while (0)
-- 
1.7.0.4

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