fs: export generic_file_buffered_read()

Export generic_file_buffered_read() to be used to supplement incomplete direct reads.

Goldwyn Rodrigues committed 7 years ago

Commit d85dc2e1 parent bbcd1f42 files · +4 −1Browse files

Unified · Split

2 files

include/linux/fs.h +2 −0
mm/filemap.c +2 −1

include/linux/fs.h+2−0

@@ -3124,6 +3124,8 @@ extern int generic_file_rw_checks(struct file file_in, struct file file_out); · 3123 unmodified lines
3124	3124	extern int generic_copy_file_checks(struct file *file_in, loff_t pos_in,
3125	3125	struct file *file_out, loff_t pos_out,
3126	3126	size_t *count, unsigned int flags);
	3127	+extern ssize_t generic_file_buffered_read(struct kiocb *iocb,
	3128	+ struct iov_iter *to, ssize_t already_read);
3127	3129	extern ssize_t generic_file_read_iter(struct kiocb , struct iov_iter );
3128	3130	extern ssize_t __generic_file_write_iter(struct kiocb , struct iov_iter );
3129	3131	extern ssize_t generic_file_write_iter(struct kiocb , struct iov_iter );

mm/filemap.c+2−1

@@ -1991,7 +1991,7 @@ static void shrink_readahead_size_eio(struct file_ra_state *ra) · 1990 unmodified lines
1991	1991	* * total number of bytes copied, including those the were already @written
1992	1992	* * negative error code if nothing was copied
1993	1993	*/
1994		−static ssize_t generic_file_buffered_read(struct kiocb *iocb,
	1994	+ssize_t generic_file_buffered_read(struct kiocb *iocb,
1995	1995	struct iov_iter *iter, ssize_t written)
1996	1996	{
1997	1997	struct file *filp = iocb->ki_filp;
@@ -2243,6 +2243,7 @@ out: · 245 unmodified lines
2243	2243	file_accessed(filp);
2244	2244	return written ? written : error;
2245	2245	}
	2246	+EXPORT_SYMBOL_GPL(generic_file_buffered_read);
2246	2247
2247	2248	/**
2248	2249	* generic_file_read_iter - generic filesystem read routine