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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
parent2c3bb20f46709a0adfa7ea408013edbcab945d5a (diff)
[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')
-rw-r--r--include/linux/kbd_kern.h4
-rw-r--r--include/linux/tty.h1
-rw-r--r--include/linux/tty_flip.h2
3 files changed, 2 insertions, 5 deletions
diff --git a/include/linux/kbd_kern.h b/include/linux/kbd_kern.h
index 4eb851ece08..efe0ee4cc80 100644
--- a/include/linux/kbd_kern.h
+++ b/include/linux/kbd_kern.h
@@ -155,10 +155,8 @@ static inline void con_schedule_flip(struct tty_struct *t)
{
unsigned long flags;
spin_lock_irqsave(&t->buf.lock, flags);
- if (t->buf.tail != NULL) {
- t->buf.tail->active = 0;
+ if (t->buf.tail != NULL)
t->buf.tail->commit = t->buf.tail->used;
- }
spin_unlock_irqrestore(&t->buf.lock, flags);
schedule_work(&t->buf.work);
}
diff --git a/include/linux/tty.h b/include/linux/tty.h
index 341cc4552c0..b3b807e4b05 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -57,7 +57,6 @@ struct tty_buffer {
unsigned char *flag_buf_ptr;
int used;
int size;
- int active;
int commit;
int read;
/* Data points here */
diff --git a/include/linux/tty_flip.h b/include/linux/tty_flip.h
index 31548303ee3..eb677cf5610 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;