1 files changed, 16 insertions, 4 deletions

diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h
index ec94c12f21da..503c8a6b3079 100644
--- a/include/linux/buffer_head.h
+++ b/include/linux/buffer_head.h
@@ -32,7 +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_Eopnotsupp,  /* operation not supported (barrier) */
         BH_Unwritten,   /* Buffer is allocated on disk but not written */
         BH_Quiet,       /* Buffer Error Prinks to be quiet */
 
@@ -124,7 +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(Eopnotsupp, eopnotsupp)
 BUFFER_FNS(Unwritten, unwritten)
 
 #define bh_offset(bh)           ((unsigned long)(bh)->b_data & ~PAGE_MASK)
@@ -214,15 +212,29 @@ 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 nobh_write_begin(struct address_space *, loff_t, unsigned, unsigned,