# \[PATCH 01/13\] seq\_file: mark seq\_get\_buf as deprecated

- From: Christoph Hellwig \<hch@lst.de\>
- Date: 2021-09-13 05:44:06 
- List: linux-block
- Page: https://ratatoskr.run/linux-block/2021/09/214032
- Thread: https://ratatoskr.run/linux-block/2021/09/214031/t.md

```text
This function pokes a big hole into the seq_file abstraction.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 include/linux/seq_file.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/linux/seq_file.h b/include/linux/seq_file.h
index dd99569595fd3..db16b11477875 100644
--- a/include/linux/seq_file.h
+++ b/include/linux/seq_file.h
@@ -59,6 +59,10 @@ static inline bool seq_has_overflowed(struct seq_file *m)
  *
  * Return the number of bytes available in the buffer, or zero if
  * there's no space.
+ *
+ * DOT NOT USE IN NEW CODE! This function pokes a hole into the whole seq_file
+ * abstraction.  The only remaining user outside of seq_file.c is sysfs, which
+ * is gradually moving away from using seq_get_buf directly.
  */
 static inline size_t seq_get_buf(struct seq_file *m, char **bufp)
 {
-- 
2.30.2

```