#include <linux/mmzone.h>
#include <linux/rbtree.h>
#include <linux/prio_tree.h>
-#include <linux/fs.h>
#include <linux/mutex.h>
#include <linux/debug_locks.h>
#include <linux/backing-dev.h>
struct mempolicy;
struct anon_vma;
+struct file_ra_state;
struct user_struct;
+struct writeback_control;
#ifndef CONFIG_DISCONTIGMEM /* Don't use mapnrs, do it properly */
extern unsigned long max_mapnr;
#define FAULT_FLAG_NONLINEAR 0x02 /* Fault was via a nonlinear mapping */
-#define FAULT_RET_NOPAGE 0x0100 /* ->fault did not return a page. This
- * can be used if the handler installs
- * their own pte.
- */
-#define FAULT_RET_LOCKED 0x0200 /* ->fault locked the page, caller must
- * unlock after installing the mapping.
- * This is used by pagecache in
- * particular, where the page lock is
- * used to synchronise against truncate
- * and invalidate. Mutually exclusive
- * with FAULT_RET_NOPAGE.
- */
-
/*
* vm_fault is filled by the the pagefault handler and passed to the vma's
- * ->fault function. The vma's ->fault is responsible for returning the
- * VM_FAULT_xxx type which occupies the lowest byte of the return code, ORed
- * with FAULT_RET_ flags that occupy the next byte and give details about
- * how the fault was handled.
+ * ->fault function. The vma's ->fault is responsible for returning a bitmask
+ * of VM_FAULT_xxx flags that give details about how the fault was handled.
*
* pgoff should be used in favour of virtual_address, if possible. If pgoff
* is used, one may set VM_CAN_NONLINEAR in the vma->vm_flags to get nonlinear
void __user *virtual_address; /* Faulting virtual address */
struct page *page; /* ->fault handlers should return a
- * page here, unless FAULT_RET_NOPAGE
+ * page here, unless VM_FAULT_NOPAGE
* is set (which is also implied by
- * VM_FAULT_OOM or SIGBUS).
+ * VM_FAULT_ERROR).
*/
};
* just gets major/minor fault counters bumped up.
*/
-/*
- * VM_FAULT_ERROR is set for the error cases, to make some tests simpler.
- */
-#define VM_FAULT_ERROR 0x20
+#define VM_FAULT_MINOR 0 /* For backwards compat. Remove me quickly. */
-#define VM_FAULT_OOM (0x00 | VM_FAULT_ERROR)
-#define VM_FAULT_SIGBUS (0x01 | VM_FAULT_ERROR)
-#define VM_FAULT_MINOR 0x02
-#define VM_FAULT_MAJOR 0x03
+#define VM_FAULT_OOM 0x0001
+#define VM_FAULT_SIGBUS 0x0002
+#define VM_FAULT_MAJOR 0x0004
+#define VM_FAULT_WRITE 0x0008 /* Special case for get_user_pages */
-/*
- * Special case for get_user_pages.
- * Must be in a distinct bit from the above VM_FAULT_ flags.
- */
-#define VM_FAULT_WRITE 0x10
+#define VM_FAULT_NOPAGE 0x0100 /* ->fault installed the pte, not return page */
+#define VM_FAULT_LOCKED 0x0200 /* ->fault locked the returned page */
-/*
- * Mask of VM_FAULT_ flags
- */
-#define VM_FAULT_MASK 0xff
+#define VM_FAULT_ERROR (VM_FAULT_OOM | VM_FAULT_SIGBUS)
#define offset_in_page(p) ((unsigned long)(p) & ~PAGE_MASK)
extern int vmtruncate_range(struct inode * inode, loff_t offset, loff_t end);
#ifdef CONFIG_MMU
-extern int __handle_mm_fault(struct mm_struct *mm,struct vm_area_struct *vma,
+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);
-}
#else
static inline int handle_mm_fault(struct mm_struct *mm,
struct vm_area_struct *vma, unsigned long address,
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);
-void install_arg_page(struct vm_area_struct *, struct page *, unsigned long);
int get_user_pages(struct task_struct *tsk, struct mm_struct *mm, unsigned long start,
int len, int write, int force, struct page **pages, struct vm_area_struct **vmas);
int set_page_dirty_lock(struct page *page);
int clear_page_dirty_for_io(struct page *page);
+extern unsigned long move_page_tables(struct vm_area_struct *vma,
+ unsigned long old_addr, struct vm_area_struct *new_vma,
+ unsigned long new_addr, unsigned long len);
extern unsigned long do_mremap(unsigned long addr,
unsigned long old_len, unsigned long new_len,
unsigned long flags, unsigned long new_addr);
+extern int mprotect_fixup(struct vm_area_struct *vma,
+ struct vm_area_struct **pprev, unsigned long start,
+ unsigned long end, unsigned long newflags);
/*
* A callback you can register to apply pressure to ageable caches.
extern void register_shrinker(struct shrinker *);
extern void unregister_shrinker(struct shrinker *);
-/*
- * Some shared mappigns will want the pages marked read-only
- * to track write events. If so, we'll downgrade vm_page_prot
- * to the private version (using protection_map[] without the
- * VM_SHARED bit).
- */
-static inline int vma_wants_writenotify(struct vm_area_struct *vma)
-{
- unsigned int vm_flags = vma->vm_flags;
-
- /* If it was private or non-writable, the write bit is already clear */
- if ((vm_flags & (VM_WRITE|VM_SHARED)) != ((VM_WRITE|VM_SHARED)))
- return 0;
-
- /* The backer wishes to know when pages are first written to? */
- if (vma->vm_ops && vma->vm_ops->page_mkwrite)
- return 1;
-
- /* The open routine did something to the protections already? */
- if (pgprot_val(vma->vm_page_prot) !=
- pgprot_val(protection_map[vm_flags &
- (VM_READ|VM_WRITE|VM_EXEC|VM_SHARED)]))
- return 0;
-
- /* Specialty mapping? */
- if (vm_flags & (VM_PFNMAP|VM_INSERTPAGE))
- return 0;
-
- /* Can the mapping track the dirty pages? */
- return vma->vm_file && vma->vm_file->f_mapping &&
- mapping_cap_account_dirty(vma->vm_file->f_mapping);
-}
+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));
}
/* mmap.c */
-extern int __vm_enough_memory(long pages, int cap_sys_admin);
+extern int __vm_enough_memory(struct mm_struct *mm, long pages, int cap_sys_admin);
extern void vma_adjust(struct vm_area_struct *vma, unsigned long start,
unsigned long end, pgoff_t pgoff, struct vm_area_struct *insert);
extern struct vm_area_struct *vma_merge(struct mm_struct *,
pgoff_t offset, unsigned long nr_to_read);
int force_page_cache_readahead(struct address_space *mapping, struct file *filp,
pgoff_t offset, unsigned long nr_to_read);
-unsigned long page_cache_readahead(struct address_space *mapping,
- struct file_ra_state *ra,
- struct file *filp,
- pgoff_t offset,
- unsigned long size);
-void handle_ra_miss(struct address_space *mapping,
- struct file_ra_state *ra, pgoff_t offset);
+
+void page_cache_sync_readahead(struct address_space *mapping,
+ struct file_ra_state *ra,
+ struct file *filp,
+ pgoff_t offset,
+ unsigned long size);
+
+void page_cache_async_readahead(struct address_space *mapping,
+ struct file_ra_state *ra,
+ struct file *filp,
+ struct page *pg,
+ pgoff_t offset,
+ unsigned long size);
+
unsigned long max_sane_readahead(unsigned long nr);
/* Do stack extension */
#ifdef CONFIG_IA64
extern int expand_upwards(struct vm_area_struct *vma, unsigned long address);
#endif
+extern int expand_stack_downwards(struct vm_area_struct *vma,
+ unsigned long address);
/* Look up the first VMA which satisfies addr < vm_end, NULL if none. */
extern struct vm_area_struct * find_vma(struct mm_struct * mm, unsigned long addr);
extern int randomize_va_space;
#endif
-__attribute__((weak)) const char *arch_vma_name(struct vm_area_struct *vma);
+const char * arch_vma_name(struct vm_area_struct *vma);
#endif /* __KERNEL__ */
#endif /* _LINUX_MM_H */
projects / linux-2.6-omap-h63xx.git / blobdiff