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SubjectRe: [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@gmail.com>
Signed-off-by: Anand Mitra <mitra@kqinfotech.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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