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-rw-r--r--Documentation/tty.txt4
1 files changed, 3 insertions, 1 deletions
diff --git a/Documentation/tty.txt b/Documentation/tty.txt
index 5f799e612e0..048a8762cfb 100644
--- a/Documentation/tty.txt
+++ b/Documentation/tty.txt
@@ -108,7 +108,9 @@ hardware driver through the function pointers within the tty->driver
structure:
write() Write a block of characters to the tty device.
- Returns the number of characters accepted.
+ Returns the number of characters accepted. The
+ character buffer passed to this method is already
+ in kernel space.
put_char() Queues a character for writing to the tty device.
If there is no room in the queue, the character is