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| author | Paul Fulghum <paulkf@microgate.com> | 2006-06-28 04:26:49 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-28 14:59:05 -0700 |
| commit | 33b37a33c242542fac2980b8ccd90977388b7a8d (patch) | |
| tree | e3a18605e57e1d1268dd04e9a3e5276f7f0488fe /include | |
| parent | 2c3bb20f46709a0adfa7ea408013edbcab945d5a (diff) | |
| download | kernel_samsung_smdk4412-33b37a33c242542fac2980b8ccd90977388b7a8d.zip kernel_samsung_smdk4412-33b37a33c242542fac2980b8ccd90977388b7a8d.tar.gz kernel_samsung_smdk4412-33b37a33c242542fac2980b8ccd90977388b7a8d.tar.bz2 | |
[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.h | 4 | ||||
| -rw-r--r-- | include/linux/tty.h | 1 | ||||
| -rw-r--r-- | include/linux/tty_flip.h | 2 |
3 files changed, 2 insertions, 5 deletions
diff --git a/include/linux/kbd_kern.h b/include/linux/kbd_kern.h index 4eb851e..efe0ee4 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 341cc45..b3b807e 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 3154830..eb677cf 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; |