Commit 6309ed7c authored May 08, 2007 by Alan Cox Committed by Linus Torvalds May 08, 2007

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 <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 3972b7f6

Documentation/tty.txt

+3 −1

Original line number	Diff line number	Diff line
		@@ -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