linux-kernel - [RFC][PATCH v2 21/23] (um) __vmalloc: add gfp flags variant of pte and pmd allocation

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Date:	Mon, 14 Mar 2011 18:12:09 +0000
From:	Prasad Joshi <prasadjoshi124@...il.com>
To:	Jeff Dike <jdike@...toit.com>, Tejun Heo <tj@...nel.org>,
	user-mode-linux-devel@...ts.sourceforge.net,
	UML Mailing List <user-mode-linux-user@...ts.sourceforge.net>,
	Prasad Joshi <prasadjoshi124@...il.com>,
	Anand Mitra <mitra@...nfotech.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	linux-arch@...r.kernel.org
Subject: [RFC][PATCH v2 21/23] (um) __vmalloc: add gfp flags variant of pte
 and pmd allocation

diff --git a/arch/um/include/asm/pgalloc.h b/arch/um/include/asm/pgalloc.h
index 32c8ce4..8b6257e 100644
--- a/arch/um/include/asm/pgalloc.h
+++ b/arch/um/include/asm/pgalloc.h
@@ -27,6 +27,7 @@ extern pgd_t *pgd_alloc(struct mm_struct *);
 extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);

 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 pgtable_t 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/um/kernel/mem.c b/arch/um/kernel/mem.c
index 8137ccc..e4caf17 100644
--- a/arch/um/kernel/mem.c
+++ b/arch/um/kernel/mem.c
@@ -284,12 +284,15 @@ void pgd_free(struct mm_struct *mm, pgd_t *pgd)
    free_page((unsigned long) pgd);
 }

-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;
+   return (pte_t *)__get_free_page(gfp_mask | __GFP_ZERO);
+}

-   pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO);
-   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);
 }

 pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
@@ -303,15 +306,21 @@ pgtable_t pte_alloc_one(struct mm_struct *mm,
unsigned long address)
 }

 #ifdef CONFIG_3_LEVEL_PGTABLES
-pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
+pmd_t *
+__pmd_alloc_one(struct mm_struct *mm, unsigned long address, gfp_t gfp_mask)
 {
-   pmd_t *pmd = (pmd_t *) __get_free_page(GFP_KERNEL);
+   pmd_t *pmd = (pmd_t *) __get_free_page(gfp_mask);

    if (pmd)
        memset(pmd, 0, PAGE_SIZE);

    return pmd;
 }
+
+pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
+{
+   return __pmd_alloc_one(mm, address, GFP_KERNEL);
+}
 #endif

 void *uml_kmalloc(int size, int flags)
--
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