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authorPaolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>2005-05-01 08:58:56 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-05-01 08:58:56 -0700
commitb97b77cca627b2e3e6d0015e2e14b1d1c12de0c8 (patch)
tree3fa7a55e316624a72764e5c7eead52b92a500a88 /arch/um/drivers/stdio_console.c
parent80f9507886076de0cadfdf2b87701e68156829c2 (diff)
[PATCH] uml: redo console locking
Fix some console locking problems (including scheduling in atomic) and various reorderings and cleanup in that code. Not yet ready for 2.6.12 probably. Signed-off-by: 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/drivers/stdio_console.c')
-rw-r--r--arch/um/drivers/stdio_console.c19
1 files changed, 6 insertions, 13 deletions
diff --git a/arch/um/drivers/stdio_console.c b/arch/um/drivers/stdio_console.c
index e604d7c8769..361d0be342b 100644
--- a/arch/um/drivers/stdio_console.c
+++ b/arch/um/drivers/stdio_console.c
@@ -116,8 +116,11 @@ static struct tty_operations console_ops = {
.open = con_open,
.close = line_close,
.write = line_write,
+ .put_char = line_put_char,
.write_room = line_write_room,
.chars_in_buffer = line_chars_in_buffer,
+ .flush_buffer = line_flush_buffer,
+ .flush_chars = line_flush_chars,
.set_termios = line_set_termios,
.ioctl = line_ioctl,
};
@@ -126,10 +129,11 @@ static void uml_console_write(struct console *console, const char *string,
unsigned len)
{
struct line *line = &vts[console->index];
+ unsigned long flags;
- down(&line->sem);
+ spin_lock_irqsave(&line->lock, flags);
console_write_chan(&line->chan_list, string, len);
- up(&line->sem);
+ spin_unlock_irqrestore(&line->lock, flags);
}
static struct tty_driver *uml_console_device(struct console *c, int *index)
@@ -192,14 +196,3 @@ static int console_chan_setup(char *str)
}
__setup("con", console_chan_setup);
__channel_help(console_chan_setup, "con");
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */