1 files changed, 0 insertions, 473 deletions
diff --git a/libdde_linux26/include/linux/.svn/text-base/pagemap.h.svn-base b/libdde_linux26/include/linux/.svn/text-base/pagemap.h.svn-base
deleted file mode 100644
index ebff43c5..00000000
--- a/libdde_linux26/include/linux/.svn/text-base/pagemap.h.svn-base
+++ /dev/null
@@ -1,473 +0,0 @@
-#ifndef _LINUX_PAGEMAP_H
-#define _LINUX_PAGEMAP_H
-
-/*
- * Copyright 1995 Linus Torvalds
- */
-#include <linux/mm.h>
-#include <linux/fs.h>
-#include <linux/list.h>
-#include <linux/highmem.h>
-#include <linux/compiler.h>
-#include <asm/uaccess.h>
-#include <linux/gfp.h>
-#include <linux/bitops.h>
-#include <linux/hardirq.h> /* for in_interrupt() */
-
-/*
- * Bits in mapping->flags.  The lower __GFP_BITS_SHIFT bits are the page
- * allocation mode flags.
- */
-#define	AS_EIO		(__GFP_BITS_SHIFT + 0)	/* IO error on async write */
-#define AS_ENOSPC	(__GFP_BITS_SHIFT + 1)	/* ENOSPC on async write */
-#define AS_MM_ALL_LOCKS	(__GFP_BITS_SHIFT + 2)	/* under mm_take_all_locks() */
-
-static inline void mapping_set_error(struct address_space *mapping, int error)
-{
-	if (unlikely(error)) {
-		if (error == -ENOSPC)
-			set_bit(AS_ENOSPC, &mapping->flags);
-		else
-			set_bit(AS_EIO, &mapping->flags);
-	}
-}
-
-#ifdef CONFIG_UNEVICTABLE_LRU
-#define AS_UNEVICTABLE	(__GFP_BITS_SHIFT + 2)	/* e.g., ramdisk, SHM_LOCK */
-
-static inline void mapping_set_unevictable(struct address_space *mapping)
-{
-	set_bit(AS_UNEVICTABLE, &mapping->flags);
-}
-
-static inline void mapping_clear_unevictable(struct address_space *mapping)
-{
-	clear_bit(AS_UNEVICTABLE, &mapping->flags);
-}
-
-static inline int mapping_unevictable(struct address_space *mapping)
-{
-	if (likely(mapping))
-		return test_bit(AS_UNEVICTABLE, &mapping->flags);
-	return !!mapping;
-}
-#else
-static inline void mapping_set_unevictable(struct address_space *mapping) { }
-static inline void mapping_clear_unevictable(struct address_space *mapping) { }
-static inline int mapping_unevictable(struct address_space *mapping)
-{
-	return 0;
-}
-#endif
-
-static inline gfp_t mapping_gfp_mask(struct address_space * mapping)
-{
-	return (__force gfp_t)mapping->flags & __GFP_BITS_MASK;
-}
-
-/*
- * This is non-atomic.  Only to be used before the mapping is activated.
- * Probably needs a barrier...
- */
-static inline void mapping_set_gfp_mask(struct address_space *m, gfp_t mask)
-{
-	m->flags = (m->flags & ~(__force unsigned long)__GFP_BITS_MASK) |
-				(__force unsigned long)mask;
-}
-
-/*
- * The page cache can done in larger chunks than
- * one page, because it allows for more efficient
- * throughput (it can then be mapped into user
- * space in smaller chunks for same flexibility).
- *
- * Or rather, it _will_ be done in larger chunks.
- */
-#define PAGE_CACHE_SHIFT	PAGE_SHIFT
-#define PAGE_CACHE_SIZE		PAGE_SIZE
-#define PAGE_CACHE_MASK		PAGE_MASK
-#define PAGE_CACHE_ALIGN(addr)	(((addr)+PAGE_CACHE_SIZE-1)&PAGE_CACHE_MASK)
-
-#define page_cache_get(page)		get_page(page)
-#define page_cache_release(page)	put_page(page)
-void release_pages(struct page **pages, int nr, int cold);
-
-/*
- * speculatively take a reference to a page.
- * If the page is free (_count == 0), then _count is untouched, and 0
- * is returned. Otherwise, _count is incremented by 1 and 1 is returned.
- *
- * This function must be called inside the same rcu_read_lock() section as has
- * been used to lookup the page in the pagecache radix-tree (or page table):
- * this allows allocators to use a synchronize_rcu() to stabilize _count.
- *
- * Unless an RCU grace period has passed, the count of all pages coming out
- * of the allocator must be considered unstable. page_count may return higher
- * than expected, and put_page must be able to do the right thing when the
- * page has been finished with, no matter what it is subsequently allocated
- * for (because put_page is what is used here to drop an invalid speculative
- * reference).
- *
- * This is the interesting part of the lockless pagecache (and lockless
- * get_user_pages) locking protocol, where the lookup-side (eg. find_get_page)
- * has the following pattern:
- * 1. find page in radix tree
- * 2. conditionally increment refcount
- * 3. check the page is still in pagecache (if no, goto 1)
- *
- * Remove-side that cares about stability of _count (eg. reclaim) has the
- * following (with tree_lock held for write):
- * A. atomically check refcount is correct and set it to 0 (atomic_cmpxchg)
- * B. remove page from pagecache
- * C. free the page
- *
- * There are 2 critical interleavings that matter:
- * - 2 runs before A: in this case, A sees elevated refcount and bails out
- * - A runs before 2: in this case, 2 sees zero refcount and retries;
- *   subsequently, B will complete and 1 will find no page, causing the
- *   lookup to return NULL.
- *
- * It is possible that between 1 and 2, the page is removed then the exact same
- * page is inserted into the same position in pagecache. That's OK: the
- * old find_get_page using tree_lock could equally have run before or after
- * such a re-insertion, depending on order that locks are granted.
- *
- * Lookups racing against pagecache insertion isn't a big problem: either 1
- * will find the page or it will not. Likewise, the old find_get_page could run
- * either before the insertion or afterwards, depending on timing.
- */
-static inline int page_cache_get_speculative(struct page *page)
-{
-	VM_BUG_ON(in_interrupt());
-
-#if !defined(CONFIG_SMP) && defined(CONFIG_CLASSIC_RCU)
-# ifdef CONFIG_PREEMPT
-	VM_BUG_ON(!in_atomic());
-# endif
-	/*
-	 * Preempt must be disabled here - we rely on rcu_read_lock doing
-	 * this for us.
-	 *
-	 * Pagecache won't be truncated from interrupt context, so if we have
-	 * found a page in the radix tree here, we have pinned its refcount by
-	 * disabling preempt, and hence no need for the "speculative get" that
-	 * SMP requires.
-	 */
-	VM_BUG_ON(page_count(page) == 0);
-	atomic_inc(&page->_count);
-
-#else
-	if (unlikely(!get_page_unless_zero(page))) {
-		/*
-		 * Either the page has been freed, or will be freed.
-		 * In either case, retry here and the caller should
-		 * do the right thing (see comments above).
-		 */
-		return 0;
-	}
-#endif
-	VM_BUG_ON(PageTail(page));
-
-	return 1;
-}
-
-/*
- * Same as above, but add instead of inc (could just be merged)
- */
-static inline int page_cache_add_speculative(struct page *page, int count)
-{
-	VM_BUG_ON(in_interrupt());
-
-#if !defined(CONFIG_SMP) && defined(CONFIG_CLASSIC_RCU)
-# ifdef CONFIG_PREEMPT
-	VM_BUG_ON(!in_atomic());
-# endif
-	VM_BUG_ON(page_count(page) == 0);
-	atomic_add(count, &page->_count);
-
-#else
-	if (unlikely(!atomic_add_unless(&page->_count, count, 0)))
-		return 0;
-#endif
-	VM_BUG_ON(PageCompound(page) && page != compound_head(page));
-
-	return 1;
-}
-
-static inline int page_freeze_refs(struct page *page, int count)
-{
-	return likely(atomic_cmpxchg(&page->_count, count, 0) == count);
-}
-
-static inline void page_unfreeze_refs(struct page *page, int count)
-{
-	VM_BUG_ON(page_count(page) != 0);
-	VM_BUG_ON(count == 0);
-
-	atomic_set(&page->_count, count);
-}
-
-#ifdef CONFIG_NUMA
-extern struct page *__page_cache_alloc(gfp_t gfp);
-#else
-static inline struct page *__page_cache_alloc(gfp_t gfp)
-{
-	return alloc_pages(gfp, 0);
-}
-#endif
-
-static inline struct page *page_cache_alloc(struct address_space *x)
-{
-	return __page_cache_alloc(mapping_gfp_mask(x));
-}
-
-static inline struct page *page_cache_alloc_cold(struct address_space *x)
-{
-	return __page_cache_alloc(mapping_gfp_mask(x)|__GFP_COLD);
-}
-
-typedef int filler_t(void *, struct page *);
-
-extern struct page * find_get_page(struct address_space *mapping,
-				pgoff_t index);
-extern struct page * find_lock_page(struct address_space *mapping,
-				pgoff_t index);
-extern struct page * find_or_create_page(struct address_space *mapping,
-				pgoff_t index, gfp_t gfp_mask);
-unsigned find_get_pages(struct address_space *mapping, pgoff_t start,
-			unsigned int nr_pages, struct page **pages);
-unsigned find_get_pages_contig(struct address_space *mapping, pgoff_t start,
-			       unsigned int nr_pages, struct page **pages);
-unsigned find_get_pages_tag(struct address_space *mapping, pgoff_t *index,
-			int tag, unsigned int nr_pages, struct page **pages);
-
-struct page *grab_cache_page_write_begin(struct address_space *mapping,
-			pgoff_t index, unsigned flags);
-
-/*
- * Returns locked page at given index in given cache, creating it if needed.
- */
-static inline struct page *grab_cache_page(struct address_space *mapping,
-								pgoff_t index)
-{
-	return find_or_create_page(mapping, index, mapping_gfp_mask(mapping));
-}
-
-extern struct page * grab_cache_page_nowait(struct address_space *mapping,
-				pgoff_t index);
-extern struct page * read_cache_page_async(struct address_space *mapping,
-				pgoff_t index, filler_t *filler,
-				void *data);
-extern struct page * read_cache_page(struct address_space *mapping,
-				pgoff_t index, filler_t *filler,
-				void *data);
-extern int read_cache_pages(struct address_space *mapping,
-		struct list_head *pages, filler_t *filler, void *data);
-
-static inline struct page *read_mapping_page_async(
-						struct address_space *mapping,
-						     pgoff_t index, void *data)
-{
-	filler_t *filler = (filler_t *)mapping->a_ops->readpage;
-	return read_cache_page_async(mapping, index, filler, data);
-}
-
-static inline struct page *read_mapping_page(struct address_space *mapping,
-					     pgoff_t index, void *data)
-{
-	filler_t *filler = (filler_t *)mapping->a_ops->readpage;
-	return read_cache_page(mapping, index, filler, data);
-}
-
-/*
- * Return byte-offset into filesystem object for page.
- */
-static inline loff_t page_offset(struct page *page)
-{
-#ifndef DDE_LINUX
-	return ((loff_t)page->index) << PAGE_CACHE_SHIFT;
-#else
-	return 0;
-#endif
-}
-
-static inline pgoff_t linear_page_index(struct vm_area_struct *vma,
-					unsigned long address)
-{
-#ifndef DDE_LINUX
-	pgoff_t pgoff = (address - vma->vm_start) >> PAGE_SHIFT;
-	pgoff += vma->vm_pgoff;
-	return pgoff >> (PAGE_CACHE_SHIFT - PAGE_SHIFT);
-#else
-	return 0;
-#endif
-}
-
-extern void __lock_page(struct page *page);
-extern int __lock_page_killable(struct page *page);
-extern void __lock_page_nosync(struct page *page);
-extern void unlock_page(struct page *page);
-
-static inline void __set_page_locked(struct page *page)
-{
-	__set_bit(PG_locked, &page->flags);
-}
-
-static inline void __clear_page_locked(struct page *page)
-{
-	__clear_bit(PG_locked, &page->flags);
-}
-
-static inline int trylock_page(struct page *page)
-{
-	return (likely(!test_and_set_bit_lock(PG_locked, &page->flags)));
-}
-
-/*
- * lock_page may only be called if we have the page's inode pinned.
- */
-static inline void lock_page(struct page *page)
-{
-#ifndef DDE_LINUX
-	might_sleep();
-	if (!trylock_page(page))
-		__lock_page(page);
-#endif
-}
-
-
-/*
- * lock_page_killable is like lock_page but can be interrupted by fatal
- * signals.  It returns 0 if it locked the page and -EINTR if it was
- * killed while waiting.
- */
-static inline int lock_page_killable(struct page *page)
-{
-	might_sleep();
-	if (!trylock_page(page))
-		return __lock_page_killable(page);
-	return 0;
-}
-
-/*
- * lock_page_nosync should only be used if we can't pin the page's inode.
- * Doesn't play quite so well with block device plugging.
- */
-static inline void lock_page_nosync(struct page *page)
-{
-#ifndef DDE_LINUX
-	might_sleep();
-	if (!trylock_page(page))
-		__lock_page_nosync(page);
-#endif
-}
-	
-/*
- * This is exported only for wait_on_page_locked/wait_on_page_writeback.
- * Never use this directly!
- */
-extern void wait_on_page_bit(struct page *page, int bit_nr);
-
-/* 
- * Wait for a page to be unlocked.
- *
- * This must be called with the caller "holding" the page,
- * ie with increased "page->count" so that the page won't
- * go away during the wait..
- */
-static inline void wait_on_page_locked(struct page *page)
-{
-#ifndef DDE_LINUX
-	if (PageLocked(page))
-		wait_on_page_bit(page, PG_locked);
-#endif
-}
-
-/* 
- * Wait for a page to complete writeback
- */
-static inline void wait_on_page_writeback(struct page *page)
-{
-#ifndef DDE_LINUX
-	if (PageWriteback(page))
-		wait_on_page_bit(page, PG_writeback);
-#endif
-}
-
-extern void end_page_writeback(struct page *page);
-
-/*
- * Fault a userspace page into pagetables.  Return non-zero on a fault.
- *
- * This assumes that two userspace pages are always sufficient.  That's
- * not true if PAGE_CACHE_SIZE > PAGE_SIZE.
- */
-static inline int fault_in_pages_writeable(char __user *uaddr, int size)
-{
-	int ret;
-
-	if (unlikely(size == 0))
-		return 0;
-
-	/*
-	 * Writing zeroes into userspace here is OK, because we know that if
-	 * the zero gets there, we'll be overwriting it.
-	 */
-	ret = __put_user(0, uaddr);
-	if (ret == 0) {
-		char __user *end = uaddr + size - 1;
-
-		/*
-		 * If the page was already mapped, this will get a cache miss
-		 * for sure, so try to avoid doing it.
-		 */
-		if (((unsigned long)uaddr & PAGE_MASK) !=
-				((unsigned long)end & PAGE_MASK))
-		 	ret = __put_user(0, end);
-	}
-	return ret;
-}
-
-static inline int fault_in_pages_readable(const char __user *uaddr, int size)
-{
-	volatile char c;
-	int ret;
-
-	if (unlikely(size == 0))
-		return 0;
-
-	ret = __get_user(c, uaddr);
-	if (ret == 0) {
-		const char __user *end = uaddr + size - 1;
-
-		if (((unsigned long)uaddr & PAGE_MASK) !=
-				((unsigned long)end & PAGE_MASK))
-		 	ret = __get_user(c, end);
-	}
-	return ret;
-}
-
-int add_to_page_cache_locked(struct page *page, struct address_space *mapping,
-				pgoff_t index, gfp_t gfp_mask);
-int add_to_page_cache_lru(struct page *page, struct address_space *mapping,
-				pgoff_t index, gfp_t gfp_mask);
-extern void remove_from_page_cache(struct page *page);
-extern void __remove_from_page_cache(struct page *page);
-
-/*
- * Like add_to_page_cache_locked, but used to add newly allocated pages:
- * the page is new, so we can just run __set_page_locked() against it.
- */
-static inline int add_to_page_cache(struct page *page,
-		struct address_space *mapping, pgoff_t offset, gfp_t gfp_mask)
-{
-	int error;
-
-	__set_page_locked(page);
-	error = add_to_page_cache_locked(page, mapping, offset, gfp_mask);
-	if (unlikely(error))
-		__clear_page_locked(page);
-	return error;
-}
-
-#endif /* _LINUX_PAGEMAP_H */