Merge branch 'usb-move' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6

[powerpc.git] / include / linux / buffer_head.h

diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h
index 737e407..5c6e128 100644 (file)
--- a/include/linux/buffer_head.h
+++ b/include/linux/buffer_head.h
@@ -14,6 +14,8 @@
 #include <linux/wait.h>
 #include <asm/atomic.h>
 
+#ifdef CONFIG_BLOCK
+
 enum bh_state_bits {
        BH_Uptodate,    /* Contains valid data */
        BH_Dirty,       /* Is dirty */
@@ -32,6 +34,7 @@ enum bh_state_bits {
        BH_Write_EIO,   /* I/O error on write */
        BH_Ordered,     /* ordered write */
        BH_Eopnotsupp,  /* operation not supported (barrier) */
+       BH_Unwritten,   /* Buffer is allocated on disk but not written */
 
        BH_PrivateStart,/* not a state bit, but the first bit available
                         * for private allocation by other entities
@@ -67,6 +70,8 @@ struct buffer_head {
        bh_end_io_t *b_end_io;          /* I/O completion */
        void *b_private;                /* reserved for b_end_io */
        struct list_head b_assoc_buffers; /* associated with another mapping */
+       struct address_space *b_assoc_map;      /* mapping this buffer is
+                                                  associated with */
        atomic_t b_count;               /* users using this buffer_head */
 };
 
@@ -122,6 +127,7 @@ BUFFER_FNS(Boundary, boundary)
 BUFFER_FNS(Write_EIO, write_io_error)
 BUFFER_FNS(Ordered, ordered)
 BUFFER_FNS(Eopnotsupp, eopnotsupp)
+BUFFER_FNS(Unwritten, unwritten)
 
 #define bh_offset(bh)          ((unsigned long)(bh)->b_data & ~PAGE_MASK)
 #define touch_buffer(bh)       mark_page_accessed(bh->b_page)
@@ -159,7 +165,7 @@ int sync_mapping_buffers(struct address_space *mapping);
 void unmap_underlying_metadata(struct block_device *bdev, sector_t block);
 
 void mark_buffer_async_write(struct buffer_head *bh);
-void invalidate_bdev(struct block_device *, int);
+void invalidate_bdev(struct block_device *);
 int sync_blockdev(struct block_device *bdev);
 void __wait_on_buffer(struct buffer_head *);
 wait_queue_head_t *bh_waitq_head(struct buffer_head *bh);
@@ -168,12 +174,15 @@ struct super_block *freeze_bdev(struct block_device *);
 void thaw_bdev(struct block_device *, struct super_block *);
 int fsync_super(struct super_block *);
 int fsync_no_super(struct block_device *);
-struct buffer_head *__find_get_block(struct block_device *, sector_t, int);
-struct buffer_head * __getblk(struct block_device *, sector_t, int);
+struct buffer_head *__find_get_block(struct block_device *bdev, sector_t block,
+                       unsigned size);
+struct buffer_head *__getblk(struct block_device *bdev, sector_t block,
+                       unsigned size);
 void __brelse(struct buffer_head *);
 void __bforget(struct buffer_head *);
-void __breadahead(struct block_device *, sector_t block, int size);
-struct buffer_head *__bread(struct block_device *, sector_t block, int size);
+void __breadahead(struct block_device *, sector_t block, unsigned int size);
+struct buffer_head *__bread(struct block_device *, sector_t block, unsigned size);
+void invalidate_bh_lrus(void);
 struct buffer_head *alloc_buffer_head(gfp_t gfp_flags);
 void free_buffer_head(struct buffer_head * bh);
 void FASTCALL(unlock_buffer(struct buffer_head *bh));
@@ -190,9 +199,7 @@ extern int buffer_heads_over_limit;
  * Generic address_space_operations implementations for buffer_head-backed
  * address_spaces.
  */
-int try_to_release_page(struct page * page, gfp_t gfp_mask);
 void block_invalidatepage(struct page *page, unsigned long offset);
-void do_invalidatepage(struct page *page, unsigned long offset);
 int block_write_full_page(struct page *page, get_block_t *get_block,
                                struct writeback_control *wbc);
 int block_read_full_page(struct page*, get_block_t*);
@@ -302,4 +309,19 @@ static inline void lock_buffer(struct buffer_head *bh)
                __lock_buffer(bh);
 }
 
+extern int __set_page_dirty_buffers(struct page *page);
+
+#else /* CONFIG_BLOCK */
+
+static inline void buffer_init(void) {}
+static inline int try_to_free_buffers(struct page *page) { return 1; }
+static inline int sync_blockdev(struct block_device *bdev) { return 0; }
+static inline int inode_has_buffers(struct inode *inode) { return 0; }
+static inline void invalidate_inode_buffers(struct inode *inode) {}
+static inline int remove_inode_buffers(struct inode *inode) { return 1; }
+static inline int sync_mapping_buffers(struct address_space *mapping) { return 0; }
+static inline void invalidate_bdev(struct block_device *bdev) {}
+
+
+#endif /* CONFIG_BLOCK */
 #endif /* _LINUX_BUFFER_HEAD_H */