Re: [RFC][PATCH v3 02/22] mm, xtensa: add gfp flags variant of pteallocations

[Prasad Joshi]

- 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@xxxxxxxxx>
Signed-off-by: Anand Mitra <mitra@xxxxxxxxxxxxxx>
---
 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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