diff options
Diffstat (limited to 'fs/buffer.c')
| -rw-r--r-- | fs/buffer.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/fs/buffer.c b/fs/buffer.c index 56c9f4e03bdd..d3fbedea7a1a 100644 --- a/fs/buffer.c +++ b/fs/buffer.c @@ -319,6 +319,7 @@ asmlinkage long sys_fsync(unsigned int fd) /* We need to protect against concurrent writers.. */ down(&inode->i_sem); + current->flags |= PF_SYNCWRITE; ret = filemap_fdatawrite(inode->i_mapping); err = file->f_op->fsync(file, dentry, 0); if (!ret) @@ -326,6 +327,7 @@ asmlinkage long sys_fsync(unsigned int fd) err = filemap_fdatawait(inode->i_mapping); if (!ret) ret = err; + current->flags &= ~PF_SYNCWRITE; up(&inode->i_sem); out_putf: @@ -354,6 +356,7 @@ asmlinkage long sys_fdatasync(unsigned int fd) goto out_putf; down(&inode->i_sem); + current->flags |= PF_SYNCWRITE; ret = filemap_fdatawrite(inode->i_mapping); err = file->f_op->fsync(file, dentry, 1); if (!ret) @@ -361,6 +364,7 @@ asmlinkage long sys_fdatasync(unsigned int fd) err = filemap_fdatawait(inode->i_mapping); if (!ret) ret = err; + current->flags &= ~PF_SYNCWRITE; up(&inode->i_sem); out_putf: @@ -1447,6 +1451,17 @@ __getblk(struct block_device *bdev, sector_t block, int size) } EXPORT_SYMBOL(__getblk); +/* + * Do async read-ahead on a buffer.. + */ +void __breadahead(struct block_device *bdev, sector_t block, int size) +{ + struct buffer_head *bh = __getblk(bdev, block, size); + ll_rw_block(READA, 1, &bh); + brelse(bh); +} +EXPORT_SYMBOL(__breadahead); + /** * __bread() - reads a specified block and returns the bh * @block: number of block |