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authorJeff Dike <jdike@addtoit.com>2006-01-06 00:18:58 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-06 08:33:46 -0800
commite4dcee8099802c71437a15b940f66106d9f88b2f (patch)
treeb4831639d38369fce2e20fd40730425ca702102c /arch/um/include
parent9159c9dfffe1746d58b015ceaa3b7b8e99ee9d5c (diff)
downloadop-kernel-dev-e4dcee8099802c71437a15b940f66106d9f88b2f.zip
op-kernel-dev-e4dcee8099802c71437a15b940f66106d9f88b2f.tar.gz
[PATCH] uml: Add throttling to console driver
This patch adds support for throttling and unthrottling input when the tty driver can't handle it. Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/um/include')
-rw-r--r--arch/um/include/chan_kern.h2
-rw-r--r--arch/um/include/line.h4
2 files changed, 6 insertions, 0 deletions
diff --git a/arch/um/include/chan_kern.h b/arch/um/include/chan_kern.h
index 84d1f64..1bb5e9d 100644
--- a/arch/um/include/chan_kern.h
+++ b/arch/um/include/chan_kern.h
@@ -38,6 +38,8 @@ extern int console_write_chan(struct list_head *chans, const char *buf,
int len);
extern int console_open_chan(struct line *line, struct console *co,
struct chan_opts *opts);
+extern void deactivate_chan(struct list_head *chans, int irq);
+extern void reactivate_chan(struct list_head *chans, int irq);
extern void chan_enable_winch(struct list_head *chans, struct tty_struct *tty);
extern void enable_chan(struct line *line);
extern void close_chan(struct list_head *chans, int delay_free_irq);
diff --git a/arch/um/include/line.h b/arch/um/include/line.h
index e6cc3ab..6f4d680 100644
--- a/arch/um/include/line.h
+++ b/arch/um/include/line.h
@@ -38,6 +38,7 @@ struct line {
struct list_head chan_list;
int valid;
int count;
+ int throttled;
/*This lock is actually, mostly, local to*/
spinlock_t lock;
@@ -60,6 +61,7 @@ struct line {
{ init_str : str, \
init_pri : INIT_STATIC, \
valid : 1, \
+ throttled : 0, \
lock : SPIN_LOCK_UNLOCKED, \
buffer : NULL, \
head : NULL, \
@@ -88,6 +90,8 @@ extern void line_flush_chars(struct tty_struct *tty);
extern int line_write_room(struct tty_struct *tty);
extern int line_ioctl(struct tty_struct *tty, struct file * file,
unsigned int cmd, unsigned long arg);
+extern void line_throttle(struct tty_struct *tty);
+extern void line_unthrottle(struct tty_struct *tty);
extern char *add_xterm_umid(char *base);
extern int line_setup_irq(int fd, int input, int output, struct line *line,
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