Initial commit from HTC m7ul-3.4.10-jb-crc-ddcfb8c
diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h
new file mode 100644
index 0000000..c47f282
--- /dev/null
+++ b/include/linux/buffer_head.h
@@ -0,0 +1,306 @@
+
+#ifndef _LINUX_BUFFER_HEAD_H
+#define _LINUX_BUFFER_HEAD_H
+
+#include <linux/types.h>
+#include <linux/fs.h>
+#include <linux/linkage.h>
+#include <linux/pagemap.h>
+#include <linux/wait.h>
+#include <linux/atomic.h>
+
+#ifdef CONFIG_BLOCK
+
+enum bh_state_bits {
+ BH_Uptodate,
+ BH_Dirty,
+ BH_Lock,
+ BH_Req,
+ BH_Uptodate_Lock,
+
+ BH_Mapped,
+ BH_New,
+ BH_Async_Read,
+ BH_Async_Write,
+ BH_Delay,
+ BH_Boundary,
+ BH_Write_EIO,
+ BH_Unwritten, /* Buffer is allocated on disk but not written */
+ BH_Quiet,
+
+ BH_PrivateStart,
+};
+
+#define MAX_BUF_PER_PAGE (PAGE_CACHE_SIZE / 512)
+
+struct page;
+struct buffer_head;
+struct address_space;
+typedef void (bh_end_io_t)(struct buffer_head *bh, int uptodate);
+
+struct buffer_head {
+ unsigned long b_state;
+ struct buffer_head *b_this_page;
+ struct page *b_page;
+
+ sector_t b_blocknr;
+ size_t b_size;
+ char *b_data;
+
+ struct block_device *b_bdev;
+ bh_end_io_t *b_end_io;
+ void *b_private;
+ struct list_head b_assoc_buffers;
+ struct address_space *b_assoc_map;
+ atomic_t b_count;
+};
+
+#define BUFFER_FNS(bit, name) \
+static inline void set_buffer_##name(struct buffer_head *bh) \
+{ \
+ set_bit(BH_##bit, &(bh)->b_state); \
+} \
+static inline void clear_buffer_##name(struct buffer_head *bh) \
+{ \
+ clear_bit(BH_##bit, &(bh)->b_state); \
+} \
+static inline int buffer_##name(const struct buffer_head *bh) \
+{ \
+ return test_bit(BH_##bit, &(bh)->b_state); \
+}
+
+#define TAS_BUFFER_FNS(bit, name) \
+static inline int test_set_buffer_##name(struct buffer_head *bh) \
+{ \
+ return test_and_set_bit(BH_##bit, &(bh)->b_state); \
+} \
+static inline int test_clear_buffer_##name(struct buffer_head *bh) \
+{ \
+ return test_and_clear_bit(BH_##bit, &(bh)->b_state); \
+} \
+
+BUFFER_FNS(Uptodate, uptodate)
+BUFFER_FNS(Dirty, dirty)
+TAS_BUFFER_FNS(Dirty, dirty)
+BUFFER_FNS(Lock, locked)
+BUFFER_FNS(Req, req)
+TAS_BUFFER_FNS(Req, req)
+BUFFER_FNS(Mapped, mapped)
+BUFFER_FNS(New, new)
+BUFFER_FNS(Async_Read, async_read)
+BUFFER_FNS(Async_Write, async_write)
+BUFFER_FNS(Delay, delay)
+BUFFER_FNS(Boundary, boundary)
+BUFFER_FNS(Write_EIO, write_io_error)
+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)
+
+#define page_buffers(page) \
+ ({ \
+ BUG_ON(!PagePrivate(page)); \
+ ((struct buffer_head *)page_private(page)); \
+ })
+#define page_has_buffers(page) PagePrivate(page)
+
+
+void mark_buffer_dirty(struct buffer_head *bh);
+void init_buffer(struct buffer_head *, bh_end_io_t *, void *);
+void set_bh_page(struct buffer_head *bh,
+ struct page *page, unsigned long offset);
+int try_to_free_buffers(struct page *);
+struct buffer_head *alloc_page_buffers(struct page *page, unsigned long size,
+ int retry);
+void create_empty_buffers(struct page *, unsigned long,
+ unsigned long b_state);
+void end_buffer_read_sync(struct buffer_head *bh, int uptodate);
+void end_buffer_write_sync(struct buffer_head *bh, int uptodate);
+void end_buffer_async_write(struct buffer_head *bh, int uptodate);
+
+void mark_buffer_dirty_inode(struct buffer_head *bh, struct inode *inode);
+int inode_has_buffers(struct inode *);
+void invalidate_inode_buffers(struct inode *);
+int remove_inode_buffers(struct inode *inode);
+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 __wait_on_buffer(struct buffer_head *);
+wait_queue_head_t *bh_waitq_head(struct buffer_head *bh);
+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, 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 unlock_buffer(struct buffer_head *bh);
+void __lock_buffer(struct buffer_head *bh);
+void ll_rw_block(int, int, struct buffer_head * bh[]);
+int sync_dirty_buffer(struct buffer_head *bh);
+int __sync_dirty_buffer(struct buffer_head *bh, int rw);
+void write_dirty_buffer(struct buffer_head *bh, int rw);
+int submit_bh(int, struct buffer_head *);
+void write_boundary_block(struct block_device *bdev,
+ sector_t bblock, unsigned blocksize);
+int bh_uptodate_or_lock(struct buffer_head *bh);
+int bh_submit_read(struct buffer_head *bh);
+
+extern int buffer_heads_over_limit;
+
+void block_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_write_full_page_endio(struct page *page, get_block_t *get_block,
+ struct writeback_control *wbc, bh_end_io_t *handler);
+int block_read_full_page(struct page*, get_block_t*);
+int block_is_partially_uptodate(struct page *page, read_descriptor_t *desc,
+ unsigned long from);
+int block_write_begin(struct address_space *mapping, loff_t pos, unsigned len,
+ unsigned flags, struct page **pagep, get_block_t *get_block);
+int __block_write_begin(struct page *page, loff_t pos, unsigned len,
+ get_block_t *get_block);
+int block_write_end(struct file *, struct address_space *,
+ loff_t, unsigned, unsigned,
+ struct page *, void *);
+int generic_write_end(struct file *, struct address_space *,
+ loff_t, unsigned, unsigned,
+ struct page *, void *);
+void page_zero_new_buffers(struct page *page, unsigned from, unsigned to);
+int cont_write_begin(struct file *, struct address_space *, loff_t,
+ unsigned, unsigned, struct page **, void **,
+ get_block_t *, loff_t *);
+int generic_cont_expand_simple(struct inode *inode, loff_t size);
+int block_commit_write(struct page *page, unsigned from, unsigned to);
+int __block_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf,
+ get_block_t get_block);
+int block_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf,
+ get_block_t get_block);
+static inline int block_page_mkwrite_return(int err)
+{
+ if (err == 0)
+ return VM_FAULT_LOCKED;
+ if (err == -EFAULT)
+ return VM_FAULT_NOPAGE;
+ if (err == -ENOMEM)
+ return VM_FAULT_OOM;
+ if (err == -EAGAIN)
+ return VM_FAULT_RETRY;
+
+ return VM_FAULT_SIGBUS;
+}
+sector_t generic_block_bmap(struct address_space *, sector_t, get_block_t *);
+int block_truncate_page(struct address_space *, loff_t, get_block_t *);
+int nobh_write_begin(struct address_space *, loff_t, unsigned, unsigned,
+ struct page **, void **, get_block_t*);
+int nobh_write_end(struct file *, struct address_space *,
+ loff_t, unsigned, unsigned,
+ struct page *, void *);
+int nobh_truncate_page(struct address_space *, loff_t, get_block_t *);
+int nobh_writepage(struct page *page, get_block_t *get_block,
+ struct writeback_control *wbc);
+
+void buffer_init(void);
+
+
+static inline void attach_page_buffers(struct page *page,
+ struct buffer_head *head)
+{
+ page_cache_get(page);
+ SetPagePrivate(page);
+ set_page_private(page, (unsigned long)head);
+}
+
+static inline void get_bh(struct buffer_head *bh)
+{
+ atomic_inc(&bh->b_count);
+}
+
+static inline void put_bh(struct buffer_head *bh)
+{
+ smp_mb__before_atomic_dec();
+ atomic_dec(&bh->b_count);
+}
+
+static inline void brelse(struct buffer_head *bh)
+{
+ if (bh)
+ __brelse(bh);
+}
+
+static inline void bforget(struct buffer_head *bh)
+{
+ if (bh)
+ __bforget(bh);
+}
+
+static inline struct buffer_head *
+sb_bread(struct super_block *sb, sector_t block)
+{
+ return __bread(sb->s_bdev, block, sb->s_blocksize);
+}
+
+static inline void
+sb_breadahead(struct super_block *sb, sector_t block)
+{
+ __breadahead(sb->s_bdev, block, sb->s_blocksize);
+}
+
+static inline struct buffer_head *
+sb_getblk(struct super_block *sb, sector_t block)
+{
+ return __getblk(sb->s_bdev, block, sb->s_blocksize);
+}
+
+static inline struct buffer_head *
+sb_find_get_block(struct super_block *sb, sector_t block)
+{
+ return __find_get_block(sb->s_bdev, block, sb->s_blocksize);
+}
+
+static inline void
+map_bh(struct buffer_head *bh, struct super_block *sb, sector_t block)
+{
+ set_buffer_mapped(bh);
+ bh->b_bdev = sb->s_bdev;
+ bh->b_blocknr = block;
+ bh->b_size = sb->s_blocksize;
+}
+
+static inline void wait_on_buffer(struct buffer_head *bh)
+{
+ might_sleep();
+ if (buffer_locked(bh))
+ __wait_on_buffer(bh);
+}
+
+static inline int trylock_buffer(struct buffer_head *bh)
+{
+ return likely(!test_and_set_bit_lock(BH_Lock, &bh->b_state));
+}
+
+static inline void lock_buffer(struct buffer_head *bh)
+{
+ might_sleep();
+ if (!trylock_buffer(bh))
+ __lock_buffer(bh);
+}
+
+extern int __set_page_dirty_buffers(struct page *page);
+
+#else
+
+static inline void buffer_init(void) {}
+static inline int try_to_free_buffers(struct page *page) { return 1; }
+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; }
+
+#endif
+#endif