summaryrefslogtreecommitdiffstats
path: root/include/linux/mm.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/linux/mm.h')
-rw-r--r--include/linux/mm.h55
1 files changed, 49 insertions, 6 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h
index a06a84d347f..bc01fff3aa0 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -634,14 +634,38 @@ struct mempolicy *shmem_get_policy(struct vm_area_struct *vma,
int shmem_lock(struct file *file, int lock, struct user_struct *user);
#else
#define shmem_nopage filemap_nopage
-#define shmem_lock(a, b, c) ({0;}) /* always in memory, no need to lock */
-#define shmem_set_policy(a, b) (0)
-#define shmem_get_policy(a, b) (NULL)
+
+static inline int shmem_lock(struct file *file, int lock,
+ struct user_struct *user)
+{
+ return 0;
+}
+
+static inline int shmem_set_policy(struct vm_area_struct *vma,
+ struct mempolicy *new)
+{
+ return 0;
+}
+
+static inline struct mempolicy *shmem_get_policy(struct vm_area_struct *vma,
+ unsigned long addr)
+{
+ return NULL;
+}
#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 *);
+#ifndef CONFIG_MMU
+extern unsigned long shmem_get_unmapped_area(struct file *file,
+ unsigned long addr,
+ unsigned long len,
+ unsigned long pgoff,
+ unsigned long flags);
+#endif
+
static inline int can_do_mlock(void)
{
if (capable(CAP_IPC_LOCK))
@@ -690,14 +714,31 @@ static inline void unmap_shared_mapping_range(struct address_space *mapping,
}
extern int vmtruncate(struct inode * inode, loff_t offset);
+extern int vmtruncate_range(struct inode * inode, loff_t offset, loff_t end);
extern int install_page(struct mm_struct *mm, struct vm_area_struct *vma, unsigned long addr, struct page *page, pgprot_t prot);
extern int install_file_pte(struct mm_struct *mm, struct vm_area_struct *vma, unsigned long addr, unsigned long pgoff, pgprot_t prot);
-extern int __handle_mm_fault(struct mm_struct *mm,struct vm_area_struct *vma, unsigned long address, int write_access);
-static inline int handle_mm_fault(struct mm_struct *mm, struct vm_area_struct *vma, unsigned long address, int write_access)
+#ifdef CONFIG_MMU
+extern int __handle_mm_fault(struct mm_struct *mm,struct vm_area_struct *vma,
+ unsigned long address, int write_access);
+
+static inline int handle_mm_fault(struct mm_struct *mm,
+ struct vm_area_struct *vma, unsigned long address,
+ int write_access)
{
- return __handle_mm_fault(mm, vma, address, write_access) & (~VM_FAULT_WRITE);
+ return __handle_mm_fault(mm, vma, address, write_access) &
+ (~VM_FAULT_WRITE);
}
+#else
+static inline int handle_mm_fault(struct mm_struct *mm,
+ struct vm_area_struct *vma, unsigned long address,
+ int write_access)
+{
+ /* should never happen if there's no MMU */
+ BUG();
+ return VM_FAULT_SIGBUS;
+}
+#endif
extern int make_pages_present(unsigned long addr, unsigned long end);
extern int access_process_vm(struct task_struct *tsk, unsigned long addr, void *buf, int len, int write);
@@ -896,6 +937,8 @@ extern unsigned long do_brk(unsigned long, unsigned long);
/* filemap.c */
extern unsigned long page_unuse(struct page *);
extern void truncate_inode_pages(struct address_space *, loff_t);
+extern void truncate_inode_pages_range(struct address_space *,
+ loff_t lstart, loff_t lend);
/* generic vm_area_ops exported for stackable file systems */
extern struct page *filemap_nopage(struct vm_area_struct *, unsigned long, int *);