regulator: tps65090: fix multiple regulator registration issue
[linux-2.6.git] / include / linux / buffer_head.h
index 7638647..458f497 100644 (file)
@@ -12,7 +12,7 @@
 #include <linux/linkage.h>
 #include <linux/pagemap.h>
 #include <linux/wait.h>
-#include <asm/atomic.h>
+#include <linux/atomic.h>
 
 #ifdef CONFIG_BLOCK
 
@@ -32,8 +32,6 @@ enum bh_state_bits {
        BH_Delay,       /* Buffer is not yet allocated on disk */
        BH_Boundary,    /* Block is followed by a discontiguity */
        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_Quiet,       /* Buffer Error Prinks to be quiet */
 
@@ -125,8 +123,6 @@ BUFFER_FNS(Async_Write, async_write)
 BUFFER_FNS(Delay, delay)
 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)
@@ -183,6 +179,8 @@ 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);
@@ -203,12 +201,10 @@ int block_write_full_page_endio(struct page *page, get_block_t *get_block,
 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_newtrunc(struct file *, struct address_space *,
-                               loff_t, unsigned, unsigned,
-                               struct page **, void **, get_block_t*);
-int block_write_begin(struct file *, struct address_space *,
-                               loff_t, unsigned, unsigned,
-                               struct page **, void **, get_block_t*);
+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 *);
@@ -216,18 +212,31 @@ 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 block_prepare_write(struct page*, unsigned, unsigned, get_block_t*);
 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);
-void block_sync_page(struct page *);
+/* Convert errno to return value from ->page_mkwrite() call */
+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;
+       /* -ENOSPC, -EDQUOT, -EIO ... */
+       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 file_fsync(struct file *, int);
 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 *,
@@ -307,15 +316,10 @@ map_bh(struct buffer_head *bh, struct super_block *sb, sector_t block)
        bh->b_size = sb->s_blocksize;
 }
 
-/*
- * Calling wait_on_buffer() for a zero-ref buffer is illegal, so we call into
- * __wait_on_buffer() just to trip a debug check.  Because debug code in inline
- * functions is bloaty.
- */
 static inline void wait_on_buffer(struct buffer_head *bh)
 {
        might_sleep();
-       if (buffer_locked(bh) || atomic_read(&bh->b_count) == 0)
+       if (buffer_locked(bh))
                __wait_on_buffer(bh);
 }