1 files changed, 18 insertions, 39 deletions

diff --git a/fs/buffer.c b/fs/buffer.c
index 0befa724ab98..13e5938a64f6 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -331,7 +331,7 @@ int file_fsync(struct file *filp, struct dentry *dentry, int datasync)
         return ret;
 }
 
-asmlinkage long sys_fsync(unsigned int fd)
+static long do_fsync(unsigned int fd, int datasync)
 {
         struct file * file;
         struct address_space *mapping;
@@ -342,14 +342,14 @@ asmlinkage long sys_fsync(unsigned int fd)
         if (!file)
                 goto out;
 
-        mapping = file->f_mapping;
-
         ret = -EINVAL;
         if (!file->f_op || !file->f_op->fsync) {
                 /* Why?  We can still call filemap_fdatawrite */
                 goto out_putf;
         }
 
+        mapping = file->f_mapping;
+
         current->flags |= PF_SYNCWRITE;
         ret = filemap_fdatawrite(mapping);
 
@@ -358,7 +358,7 @@ asmlinkage long sys_fsync(unsigned int fd)
          * which could cause livelocks in fsync_buffers_list
          */
         down(&mapping->host->i_sem);
-        err = file->f_op->fsync(file, file->f_dentry, 0);
+        err = file->f_op->fsync(file, file->f_dentry, datasync);
         if (!ret)
                 ret = err;
         up(&mapping->host->i_sem);
@@ -373,39 +373,14 @@ out:
         return ret;
 }
 
-asmlinkage long sys_fdatasync(unsigned int fd)
+asmlinkage long sys_fsync(unsigned int fd)
 {
-        struct file * file;
-        struct address_space *mapping;
-        int ret, err;
-
-        ret = -EBADF;
-        file = fget(fd);
-        if (!file)
-                goto out;
-
-        ret = -EINVAL;
-        if (!file->f_op || !file->f_op->fsync)
-                goto out_putf;
-
-        mapping = file->f_mapping;
-
-        current->flags |= PF_SYNCWRITE;
-        ret = filemap_fdatawrite(mapping);
-        down(&mapping->host->i_sem);
-        err = file->f_op->fsync(file, file->f_dentry, 1);
-        if (!ret)
-                ret = err;
-        up(&mapping->host->i_sem);
-        err = filemap_fdatawait(mapping);
-        if (!ret)
-                ret = err;
-        current->flags &= ~PF_SYNCWRITE;
+        return do_fsync(fd, 0);
+}
 
-out_putf:
-        fput(file);
-out:
-        return ret;
+asmlinkage long sys_fdatasync(unsigned int fd)
+{
+        return do_fsync(fd, 1);
 }
 
 /*
@@ -1951,7 +1926,6 @@ static int __block_prepare_write(struct inode *inode, struct page *page,
                         if (err)
                                 break;
                         if (buffer_new(bh)) {
-                                clear_buffer_new(bh);
                                 unmap_underlying_metadata(bh->b_bdev,
                                                         bh->b_blocknr);
                                 if (PageUptodate(page)) {
@@ -1993,9 +1967,14 @@ static int __block_prepare_write(struct inode *inode, struct page *page,
                 if (!buffer_uptodate(*wait_bh))
                         err = -EIO;
         }
-        if (!err)
-                return err;
-
+        if (!err) {
+                bh = head;
+                do {
+                        if (buffer_new(bh))
+                                clear_buffer_new(bh);
+                } while ((bh = bh->b_this_page) != head);
+                return 0;
+        }
         /* Error case: */
         /*
          * Zero out any newly allocated blocks to avoid exposing stale