linux-kernel - [PATCH] mm: util: update the kerneldoc for kstrdup

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Message-Id: <20200628152500.17916-1-brgl@bgdev.pl>
Date:   Sun, 28 Jun 2020 17:25:00 +0200
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: [PATCH] mm: util: update the kerneldoc for kstrdup_const()

From: Bartosz Golaszewski <bgolaszewski@...libre.com>

Memory allocated with kstrdup_const() must not be passed to regular
krealloc() as it is not aware of the possibility of the chunk residing
in .rodata. Since there are no potential users of krealloc_const()
at the moment, let's just update the doc to make it explicit.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
---
 mm/util.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/mm/util.c b/mm/util.c
index c63c8e47be57..27d6155edb8f 100644
--- a/mm/util.c
+++ b/mm/util.c
@@ -69,7 +69,8 @@ EXPORT_SYMBOL(kstrdup);
  * @s: the string to duplicate
  * @gfp: the GFP mask used in the kmalloc() call when allocating memory
  *
- * Note: Strings allocated by kstrdup_const should be freed by kfree_const.
+ * Note: Strings allocated by kstrdup_const should be freed by kfree_const and
+ * must not be passed to krealloc().
  *
  * Return: source string if it is in .rodata section otherwise
  * fallback to kstrdup.
-- 
2.26.1