linux-kernel - [PATCH 01/13] seq_file: mark seq_get

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Message-Id: <20210913054121.616001-2-hch@lst.de>
Date:   Mon, 13 Sep 2021 07:41:09 +0200
From:   Christoph Hellwig <hch@....de>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Alexander Viro <viro@...iv.linux.org.uk>
Cc:     Jens Axboe <axboe@...nel.dk>, Tejun Heo <tj@...nel.org>,
        linux-block@...r.kernel.org, linux-xfs@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 01/13] seq_file: mark seq_get_buf as deprecated

This function pokes a big hole into the seq_file abstraction.

Signed-off-by: Christoph Hellwig <hch@....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