X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=include%2Flinux%2Fmm.h;h=e4183c6c7de3dca209ed8f99eb852719e3f31bfb;hb=e8edc6e03a5c8562dc70a6d969f732bdb355a7e7;hp=a0eec16eb0bdbb6a2092b443f299f28c5c11cc25;hpb=8800c0ebf5e8363dab66647512dcef5b83203dec;p=deliverable%2Flinux.git

diff --git a/include/linux/mm.h b/include/linux/mm.h
index a0eec16eb0bd..e4183c6c7de3 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1,7 +1,6 @@
 #ifndef _LINUX_MM_H
 #define _LINUX_MM_H
 
-#include <linux/sched.h>
 #include <linux/errno.h>
 #include <linux/capability.h>
 
@@ -20,6 +19,7 @@
 
 struct mempolicy;
 struct anon_vma;
+struct user_struct;
 
 #ifndef CONFIG_DISCONTIGMEM          /* Don't use mapnrs, do it properly */
 extern unsigned long max_mapnr;
@@ -267,21 +267,31 @@ static inline int get_page_unless_zero(struct page *page)
 	return atomic_inc_not_zero(&page->_count);
 }
 
+static inline struct page *compound_head(struct page *page)
+{
+	if (unlikely(PageTail(page)))
+		return page->first_page;
+	return page;
+}
+
 static inline int page_count(struct page *page)
 {
-	if (unlikely(PageCompound(page)))
-		page = (struct page *)page_private(page);
-	return atomic_read(&page->_count);
+	return atomic_read(&compound_head(page)->_count);
 }
 
 static inline void get_page(struct page *page)
 {
-	if (unlikely(PageCompound(page)))
-		page = (struct page *)page_private(page);
+	page = compound_head(page);
 	VM_BUG_ON(atomic_read(&page->_count) == 0);
 	atomic_inc(&page->_count);
 }
 
+static inline struct page *virt_to_head_page(const void *x)
+{
+	struct page *page = virt_to_page(x);
+	return compound_head(page);
+}
+
 /*
  * Setup the page count before being freed into the page allocator for
  * the first time (boot or memory hotplug)
@@ -314,6 +324,18 @@ static inline compound_page_dtor *get_compound_page_dtor(struct page *page)
 	return (compound_page_dtor *)page[1].lru.next;
 }
 
+static inline int compound_order(struct page *page)
+{
+	if (!PageHead(page))
+		return 0;
+	return (unsigned long)page[1].lru.prev;
+}
+
+static inline void set_compound_order(struct page *page, unsigned long order)
+{
+	page[1].lru.prev = (void *)order;
+}
+
 /*
  * Multiple processes may "see" the same page. E.g. for untouched
  * mappings of /dev/null, all processes see the same page full of
@@ -660,15 +682,11 @@ static inline int page_mapped(struct page *page)
 extern void show_free_areas(void);
 
 #ifdef CONFIG_SHMEM
-struct page *shmem_nopage(struct vm_area_struct *vma,
-			unsigned long address, int *type);
 int shmem_set_policy(struct vm_area_struct *vma, struct mempolicy *new);
 struct mempolicy *shmem_get_policy(struct vm_area_struct *vma,
 					unsigned long addr);
 int shmem_lock(struct file *file, int lock, struct user_struct *user);
 #else
-#define shmem_nopage filemap_nopage
-
 static inline int shmem_lock(struct file *file, int lock,
 			     struct user_struct *user)
 {
@@ -688,7 +706,6 @@ static inline struct mempolicy *shmem_get_policy(struct vm_area_struct *vma,
 }
 #endif
 struct file *shmem_file_setup(char *name, loff_t size, unsigned long flags);
-extern int shmem_mmap(struct file *file, struct vm_area_struct *vma);
 
 int shmem_zero_setup(struct vm_area_struct *);
 
@@ -700,14 +717,7 @@ extern unsigned long shmem_get_unmapped_area(struct file *file,
 					     unsigned long flags);
 #endif
 
-static inline int can_do_mlock(void)
-{
-	if (capable(CAP_IPC_LOCK))
-		return 1;
-	if (current->signal->rlim[RLIMIT_MEMLOCK].rlim_cur != 0)
-		return 1;
-	return 0;
-}
+extern int can_do_mlock(void);
 extern int user_shm_lock(size_t, struct user_struct *);
 extern void user_shm_unlock(size_t, struct user_struct *);
 
@@ -855,8 +865,26 @@ static inline int vma_wants_writenotify(struct vm_area_struct *vma)
 
 extern pte_t *FASTCALL(get_locked_pte(struct mm_struct *mm, unsigned long addr, spinlock_t **ptl));
 
+#ifdef __PAGETABLE_PUD_FOLDED
+static inline int __pud_alloc(struct mm_struct *mm, pgd_t *pgd,
+						unsigned long address)
+{
+	return 0;
+}
+#else
 int __pud_alloc(struct mm_struct *mm, pgd_t *pgd, unsigned long address);
+#endif
+
+#ifdef __PAGETABLE_PMD_FOLDED
+static inline int __pmd_alloc(struct mm_struct *mm, pud_t *pud,
+						unsigned long address)
+{
+	return 0;
+}
+#else
 int __pmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long address);
+#endif
+
 int __pte_alloc(struct mm_struct *mm, pmd_t *pmd, unsigned long address);
 int __pte_alloc_kernel(pmd_t *pmd, unsigned long address);
 
@@ -1135,6 +1163,11 @@ struct page *follow_page(struct vm_area_struct *, unsigned long address,
 #define FOLL_GET	0x04	/* do get_page on page */
 #define FOLL_ANON	0x08	/* give ZERO_PAGE if no pgtable */
 
+typedef int (*pte_fn_t)(pte_t *pte, struct page *pmd_page, unsigned long addr,
+			void *data);
+extern int apply_to_page_range(struct mm_struct *mm, unsigned long address,
+			       unsigned long size, pte_fn_t fn, void *data);
+
 #ifdef CONFIG_PROC_FS
 void vm_stat_account(struct mm_struct *, unsigned long, struct file *, long);
 #else