From 6309ed7cb2b0671b0db9386abc6307ec3108bbaa Mon Sep 17 00:00:00 2001 From: Alan Date: Tue, 8 May 2007 00:24:21 -0700 Subject: [PATCH] tty: Clarify documentation of ->write() The tty driver write method is different to the usual fops device write methods as the buffer is already in kernel space. Clarify the docs since someone writing a driver made that mistake. Signed-off-by: Alan Cox Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- Documentation/tty.txt | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/Documentation/tty.txt b/Documentation/tty.txt index 5f799e612e03..048a8762cfb5 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 -- 2.30.2