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-rw-r--r--fs/dcache.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/fs/dcache.c b/fs/dcache.c
index c231a639c2a2..bdb3f50248a7 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -1908,7 +1908,8 @@ static int prepend_name(char **buffer, int *buflen, struct qstr *name)
* Convert a dentry into an ASCII path name. If the entry has been deleted
* the string " (deleted)" is appended. Note that this is ambiguous.
*
- * Returns the buffer or an error code if the path was too long.
+ * Returns a pointer into the buffer or an error code if the
+ * path was too long.
*
* "buflen" should be positive. Caller holds the dcache_lock.
*
@@ -1984,7 +1985,10 @@ Elong:
* Convert a dentry into an ASCII path name. If the entry has been deleted
* the string " (deleted)" is appended. Note that this is ambiguous.
*
- * Returns the buffer or an error code if the path was too long.
+ * Returns a pointer into the buffer or an error code if the path was
+ * too long. Note: Callers should use the returned pointer, not the passed
+ * in buffer, to use the name! The implementation often starts at an offset
+ * into the buffer, and may leave 0 bytes at the start.
*
* "buflen" should be positive.
*/