From: Alan Date: Tue, 8 May 2007 07:24:21 +0000 (-0700) Subject: tty: Clarify documentation of ->write() X-Git-Tag: v2.6.22-rc1~787 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=6309ed7cb2b0671b0db9386abc6307ec3108bbaa;p=linux.git 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 --- 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