[PATCH] uml: remove os_isatty

os_isatty can be made to disappear by moving maybe_sigio_broken from kernel to
user code.  This also lets write_sigio_workaround become static.

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>

1 files changed, 2 insertions, 15 deletions

diff --git a/arch/um/kernel/irq.c b/arch/um/kernel/irq.c
index 27bc58ad38fd..589c69a75043 100644
--- a/arch/um/kernel/irq.c
+++ b/arch/um/kernel/irq.c
@@ -110,19 +110,6 @@ void sigio_handler(int sig, union uml_pt_regs *regs)
 	free_irqs();
 }
 
-static void maybe_sigio_broken(int fd, int type)
-{
-	if (os_isatty(fd)) {
-		if ((type == IRQ_WRITE) && !pty_output_sigio) {
-			write_sigio_workaround();
-			add_sigio_fd(fd, 0);
-		} else if ((type == IRQ_READ) && !pty_close_sigio) {
-			write_sigio_workaround();
-			add_sigio_fd(fd, 1);
-		}
-	}
-}
-
 static DEFINE_SPINLOCK(irq_lock);
 
 int activate_fd(int irq, int fd, int type, void *dev_id)
@@ -221,7 +208,7 @@ int activate_fd(int irq, int fd, int type, void *dev_id)
 	/* This calls activate_fd, so it has to be outside the critical
 	 * section.
 	 */
-	maybe_sigio_broken(fd, type);
+	maybe_sigio_broken(fd, (type == IRQ_READ));
 
 	return(0);
 
@@ -318,7 +305,7 @@ void reactivate_fd(int fd, int irqnum)
 	/* This calls activate_fd, so it has to be outside the critical
 	 * section.
 	 */
-	maybe_sigio_broken(fd, irq->type);
+	maybe_sigio_broken(fd, (irq->type == IRQ_READ));
 }
 
 void deactivate_fd(int fd, int irqnum)