Author: Alan <[EMAIL PROTECTED]>
AuthorDate: Tue May 8 00:24:21 2007 -0700
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Tue May 8 11:14:59 2007 -0700
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 <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
Documentation/tty.txt | 4 +++-
1 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/Documentation/tty.txt b/Documentation/tty.txt
index 5f799e6..048a876 100644
@@ -108,7 +108,9 @@ hardware driver through the function pointers within the
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
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