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Date: Sat, 17 Sep 2011 01:46:48 +0800
From: Tzu-Jung Lee <roylee17@...il.com>
To: linux-kernel@...r.kernel.org
Cc: rmk+kernel@....linux.org.uk, aarcange@...hat.com,
Tzu-Jung Lee <tjlee@...arella.com>
Subject: [PATCH] mm: add dummy place holders when TRANSPARENT_HUGEPAGE is undefined
To eliminate compile-time errors when built with -O0
Change-Id: I57d63b9168d31499d234afbc1db6e25966b1b08b
Signed-off-by: Tzu-Jung Lee <tjlee@...arella.com>
diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h
index 8847c8c..edd68a9 100644
--- a/include/linux/huge_mm.h
+++ b/include/linux/huge_mm.h
@@ -1,6 +1,24 @@
#ifndef _LINUX_HUGE_MM_H
#define _LINUX_HUGE_MM_H
+enum transparent_hugepage_flag {
+ TRANSPARENT_HUGEPAGE_FLAG,
+ TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG,
+ TRANSPARENT_HUGEPAGE_DEFRAG_FLAG,
+ TRANSPARENT_HUGEPAGE_DEFRAG_REQ_MADV_FLAG,
+ TRANSPARENT_HUGEPAGE_DEFRAG_KHUGEPAGED_FLAG,
+#ifdef CONFIG_DEBUG_VM
+ TRANSPARENT_HUGEPAGE_DEBUG_COW_FLAG,
+#endif
+};
+
+enum page_check_address_pmd_flag {
+ PAGE_CHECK_ADDRESS_PMD_FLAG,
+ PAGE_CHECK_ADDRESS_PMD_NOTSPLITTING_FLAG,
+ PAGE_CHECK_ADDRESS_PMD_SPLITTING_FLAG,
+};
+
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
extern int do_huge_pmd_anonymous_page(struct mm_struct *mm,
struct vm_area_struct *vma,
unsigned long address, pmd_t *pmd,
@@ -24,29 +42,11 @@ extern int mincore_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd,
unsigned char *vec);
extern int change_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd,
unsigned long addr, pgprot_t newprot);
-
-enum transparent_hugepage_flag {
- TRANSPARENT_HUGEPAGE_FLAG,
- TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG,
- TRANSPARENT_HUGEPAGE_DEFRAG_FLAG,
- TRANSPARENT_HUGEPAGE_DEFRAG_REQ_MADV_FLAG,
- TRANSPARENT_HUGEPAGE_DEFRAG_KHUGEPAGED_FLAG,
-#ifdef CONFIG_DEBUG_VM
- TRANSPARENT_HUGEPAGE_DEBUG_COW_FLAG,
-#endif
-};
-
-enum page_check_address_pmd_flag {
- PAGE_CHECK_ADDRESS_PMD_FLAG,
- PAGE_CHECK_ADDRESS_PMD_NOTSPLITTING_FLAG,
- PAGE_CHECK_ADDRESS_PMD_SPLITTING_FLAG,
-};
extern pmd_t *page_check_address_pmd(struct page *page,
struct mm_struct *mm,
unsigned long address,
enum page_check_address_pmd_flag flag);
-#ifdef CONFIG_TRANSPARENT_HUGEPAGE
#define HPAGE_PMD_SHIFT HPAGE_SHIFT
#define HPAGE_PMD_MASK HPAGE_MASK
#define HPAGE_PMD_SIZE HPAGE_SIZE
@@ -175,6 +175,64 @@ static inline void vma_adjust_trans_huge(struct vm_area_struct *vma,
long adjust_next)
{
}
+static inline int do_huge_pmd_anonymous_page(struct mm_struct *mm,
+ struct vm_area_struct *vma,
+ unsigned long address, pmd_t *pmd,
+ unsigned int flags)
+{
+ return 0;
+}
+static inline int copy_huge_pmd(struct mm_struct *dst_mm,
+ struct mm_struct *src_mm,
+ pmd_t *dst_pmd, pmd_t *src_pmd,
+ unsigned long addr,
+ struct vm_area_struct *vma)
+{
+ return 0;
+}
+static inline int do_huge_pmd_wp_page(struct mm_struct *mm,
+ struct vm_area_struct *vma,
+ unsigned long address,
+ pmd_t *pmd,
+ pmd_t orig_pmd)
+{
+ return 0;
+}
+static inline pgtable_t get_pmd_huge_pte(struct mm_struct *mm)
+{
+ return 0;
+}
+static inline struct page *follow_trans_huge_pmd(struct mm_struct *mm,
+ unsigned long addr,
+ pmd_t *pmd,
+ unsigned int flags)
+{
+ return 0;
+}
+static inline int zap_huge_pmd(struct mmu_gather *tlb,
+ struct vm_area_struct *vma,
+ pmd_t *pmd)
+{
+ return 0;
+}
+static inline int mincore_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd,
+ unsigned long addr, unsigned long end,
+ unsigned char *vec)
+{
+ return 0;
+}
+static inline int change_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd,
+ unsigned long addr, pgprot_t newprot)
+{
+ return 0;
+}
+static inline pmd_t *page_check_address_pmd(struct page *page,
+ struct mm_struct *mm,
+ unsigned long address,
+ enum page_check_address_pmd_flag flag)
+{
+ return 0;
+}
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
#endif /* _LINUX_HUGE_MM_H */
--
1.7.6.1
--
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