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authorPaul Fulghum <paulkf@microgate.com>2006-06-28 04:26:49 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-28 14:59:05 -0700
commit33b37a33c242542fac2980b8ccd90977388b7a8d (patch)
treee3a18605e57e1d1268dd04e9a3e5276f7f0488fe /include/linux/tty_flip.h
parent2c3bb20f46709a0adfa7ea408013edbcab945d5a (diff)
downloadlinux-linaro-stable-33b37a33c242542fac2980b8ccd90977388b7a8d.tar.gz
[PATCH] remove active field from tty buffer structure
Remove 'active' field from tty buffer structure. This was added in 2.6.16 as part of a patch to make the new tty buffering SMP safe. This field is unnecessary with the more intelligently written flush_to_ldisc that adds receive_room handling. Removing this field reverts to simpler logic where the tail buffer is always the 'active' buffer, which should not be freed by flush_to_ldisc. (active == buffer being filled with new data) The result is simpler, smaller, and faster tty buffer code. Signed-off-by: Paul Fulghum <paulkf@microgate.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/tty_flip.h')
-rw-r--r--include/linux/tty_flip.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/tty_flip.h b/include/linux/tty_flip.h
index 31548303ee37..eb677cf56106 100644
--- a/include/linux/tty_flip.h
+++ b/include/linux/tty_flip.h
@@ -12,7 +12,7 @@ static inline int tty_insert_flip_char(struct tty_struct *tty,
unsigned char ch, char flag)
{
struct tty_buffer *tb = tty->buf.tail;
- if (tb && tb->active && tb->used < tb->size) {
+ if (tb && tb->used < tb->size) {
tb->flag_buf_ptr[tb->used] = flag;
tb->char_buf_ptr[tb->used++] = ch;
return 1;