X-Git-Url: http://git.cascardo.info/?a=blobdiff_plain;f=include%2Flinux%2Fhugetlb.h;h=3f3e7a648da3947c76839e02670c75c2cfd27710;hb=fabb5c4e4a474ff0f7d6c1d3466a1b79bbce5f49;hp=5081d27bfa27ac22979dd4a2ad7a865b81701893;hpb=7c2aed4b5632fb536721b8494d1a4a65852ffb49;p=cascardo%2Flinux.git

diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index 5081d27bfa27..3f3e7a648da3 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -4,6 +4,7 @@
 #ifdef CONFIG_HUGETLB_PAGE
 
 #include <linux/mempolicy.h>
+#include <linux/shm.h>
 #include <asm/tlbflush.h>
 
 struct ctl_table;
@@ -35,6 +36,7 @@ extern int sysctl_hugetlb_shm_group;
 
 pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr);
 pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr);
+int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep);
 struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address,
 			      int write);
 struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address,
@@ -60,8 +62,11 @@ void hugetlb_free_pgd_range(struct mmu_gather **tlb, unsigned long addr,
  * If the arch doesn't supply something else, assume that hugepage
  * size aligned regions are ok without further preparation.
  */
-static inline int prepare_hugepage_range(unsigned long addr, unsigned long len)
+static inline int prepare_hugepage_range(unsigned long addr, unsigned long len,
+						pgoff_t pgoff)
 {
+	if (pgoff & (~HPAGE_MASK >> PAGE_SHIFT))
+		return -EINVAL;
 	if (len & ~HPAGE_MASK)
 		return -EINVAL;
 	if (addr & ~HPAGE_MASK)
@@ -69,7 +74,8 @@ static inline int prepare_hugepage_range(unsigned long addr, unsigned long len)
 	return 0;
 }
 #else
-int prepare_hugepage_range(unsigned long addr, unsigned long len);
+int prepare_hugepage_range(unsigned long addr, unsigned long len,
+						pgoff_t pgoff);
 #endif
 
 #ifndef ARCH_HAS_SETCLEAR_HUGE_PTE
@@ -107,7 +113,7 @@ static inline unsigned long hugetlb_total_pages(void)
 #define hugetlb_report_meminfo(buf)		0
 #define hugetlb_report_node_meminfo(n, buf)	0
 #define follow_huge_pmd(mm, addr, pmd, write)	NULL
-#define prepare_hugepage_range(addr, len)	(-EINVAL)
+#define prepare_hugepage_range(addr,len,pgoff)	(-EINVAL)
 #define pmd_huge(x)	0
 #define is_hugepage_only_range(mm, addr, len)	0
 #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; })
@@ -163,7 +169,12 @@ void hugetlb_put_quota(struct address_space *mapping);
 
 static inline int is_file_hugepages(struct file *file)
 {
-	return file->f_op == &hugetlbfs_file_operations;
+	if (file->f_op == &hugetlbfs_file_operations)
+		return 1;
+	if (is_file_shm_hugepages(file))
+		return 1;
+
+	return 0;
 }
 
 static inline void set_file_hugepages(struct file *file)