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SubjectRe: [RFC][PATCH v3 02/22] mm, xtensa: add gfp flags variant of pte allocations

- Added __pte_alloc_one_kernel() function which is similar to
pte_alloc_one_kernel(), but accepts an additional argument to allow caller
to specify the allocation flag. The function pte_alloc_one_kernel() is
changed to call __pte_alloc_one_kernel().

- changes help in fixing the Bug 30702

Signed-off-by: Prasad Joshi <prasadjoshi124@gmail.com>
Signed-off-by: Anand Mitra <mitra@kqinfotech.com>
---
arch/xtensa/include/asm/pgalloc.h | 9 ++++++++-
arch/xtensa/mm/pgtable.c | 11 +++++++++--
2 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/arch/xtensa/include/asm/pgalloc.h b/arch/xtensa/include/asm/pgalloc.h
index 40cf9bc..d5a23ae 100644
--- a/arch/xtensa/include/asm/pgalloc.h
+++ b/arch/xtensa/include/asm/pgalloc.h
@@ -42,10 +42,17 @@ static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)

extern struct kmem_cache *pgtable_cache;

+static inline pte_t *
+__pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address,
+ gfp_t gfp_mask)
+{
+ return kmem_cache_alloc(pgtable_cache, gfp_mask);
+}
+
static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
unsigned long address)
{
- return kmem_cache_alloc(pgtable_cache, GFP_KERNEL|__GFP_REPEAT);
+ return __pte_alloc_one_kernel(mm, address, GFP_KERNEL | __GFP_REPEAT);
}

static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
diff --git a/arch/xtensa/mm/pgtable.c b/arch/xtensa/mm/pgtable.c
index 6979927..eff6c1d 100644
--- a/arch/xtensa/mm/pgtable.c
+++ b/arch/xtensa/mm/pgtable.c
@@ -12,13 +12,15 @@

#if (DCACHE_SIZE > PAGE_SIZE)

-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 = NULL, *p;
int color = ADDR_COLOR(address);
int i;

- p = (pte_t*) __get_free_pages(GFP_KERNEL|__GFP_REPEAT, COLOR_ORDER);
+ p = (pte_t*) __get_free_pages(gfp_mask, COLOR_ORDER);

if (likely(p)) {
split_page(virt_to_page(p), COLOR_ORDER);
@@ -35,6 +37,11 @@ pte_t* pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
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);
+}
+
#ifdef PROFILING

int mask;
--
1.7.0.4


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