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-rw-r--r--mm/slab.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/mm/slab.c b/mm/slab.c
index a041c5378df..05a391059fe 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -2998,6 +2998,8 @@ EXPORT_SYMBOL(kzalloc);
* kfree - free previously allocated memory
* @objp: pointer returned by kmalloc.
*
+ * If @objp is NULL, no operation is performed.
+ *
* Don't free memory not originally allocated by kmalloc()
* or you will run into trouble.
*/