net: fix build erros with CONFIG_BUG=n, CONFIG_GENERIC_BUG=n

[safe/jmp/linux-2.6] / include / linux / pagemap.h

diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index 4b6c4d8..ed5d750 100644 (file)
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -18,9 +18,12 @@
  * 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() */
+enum mapping_flags {
+       AS_EIO          = __GFP_BITS_SHIFT + 0, /* IO error on async write */
+       AS_ENOSPC       = __GFP_BITS_SHIFT + 1, /* ENOSPC on async write */
+       AS_MM_ALL_LOCKS = __GFP_BITS_SHIFT + 2, /* under mm_take_all_locks() */
+       AS_UNEVICTABLE  = __GFP_BITS_SHIFT + 3, /* e.g., ramdisk, SHM_LOCK */
+};
 
 static inline void mapping_set_error(struct address_space *mapping, int error)
 {
@@ -32,9 +35,6 @@ static inline void mapping_set_error(struct address_space *mapping, int error)
        }
 }
 
-#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);
@@ -51,14 +51,6 @@ static inline int mapping_unevictable(struct address_space *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)
 {
@@ -140,7 +132,7 @@ static inline int page_cache_get_speculative(struct page *page)
 {
        VM_BUG_ON(in_interrupt());
 
-#if !defined(CONFIG_SMP) && defined(CONFIG_CLASSIC_RCU)
+#if !defined(CONFIG_SMP) && defined(CONFIG_TREE_RCU)
 # ifdef CONFIG_PREEMPT
        VM_BUG_ON(!in_atomic());
 # endif
@@ -178,7 +170,7 @@ 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)
+#if !defined(CONFIG_SMP) && defined(CONFIG_TREE_RCU)
 # ifdef CONFIG_PREEMPT
        VM_BUG_ON(!in_atomic());
 # endif
@@ -241,7 +233,8 @@ unsigned find_get_pages_contig(struct address_space *mapping, pgoff_t start,
 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(struct address_space *mapping, pgoff_t index);
+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.
@@ -299,19 +292,19 @@ 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)
+static inline void __set_page_locked(struct page *page)
 {
-       set_bit(PG_locked, &page->flags);
+       __set_bit(PG_locked, &page->flags);
 }
 
-static inline void clear_page_locked(struct page *page)
+static inline void __clear_page_locked(struct page *page)
 {
-       clear_bit(PG_locked, &page->flags);
+       __clear_bit(PG_locked, &page->flags);
 }
 
 static inline int trylock_page(struct page *page)
 {
-       return !test_and_set_bit(PG_locked, &page->flags);
+       return (likely(!test_and_set_bit_lock(PG_locked, &page->flags)));
 }
 
 /*
@@ -379,6 +372,11 @@ static inline void wait_on_page_writeback(struct page *page)
 extern void end_page_writeback(struct page *page);
 
 /*
+ * Add an arbitrary waiter to a page's wait queue
+ */
+extern void add_page_wait_queue(struct page *page, wait_queue_t *waiter);
+
+/*
  * Fault a userspace page into pagetables.  Return non-zero on a fault.
  *
  * This assumes that two userspace pages are always sufficient.  That's
@@ -438,17 +436,17 @@ 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.
+ * 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);
+       __set_page_locked(page);
        error = add_to_page_cache_locked(page, mapping, offset, gfp_mask);
        if (unlikely(error))
-               clear_page_locked(page);
+               __clear_page_locked(page);
        return error;
 }