linux-kernel - [PATCH 4/11] UML - Separate timer initialization

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Date:	Wed, 19 Sep 2007 13:02:24 -0400
From:	Jeff Dike <jdike@...toit.com>
To:	Andrew Morton <akpm@...l.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	uml-devel <user-mode-linux-devel@...ts.sourceforge.net>
Subject: [PATCH 4/11] UML - Separate timer initialization

Move timer signal initialization from init_irq_signals to a new
function, timer_init.

Signed-off-by: Jeff Dike <jdike@...ux.intel.com>
---
 arch/um/include/os.h      |    1 +
 arch/um/kernel/time.c     |    2 ++
 arch/um/os-Linux/irq.c    |    4 ----
 arch/um/os-Linux/signal.c |   10 ++++++++++
 4 files changed, 13 insertions(+), 4 deletions(-)

Index: linux-2.6.20/arch/um/kernel/time.c
===================================================================
--- linux-2.6.20.orig/arch/um/kernel/time.c	2007-09-19 12:25:05.000000000 -0400
+++ linux-2.6.20/arch/um/kernel/time.c	2007-09-19 12:25:06.000000000 -0400
@@ -97,6 +97,8 @@ static void register_timer(void)
 {
 	int err;
 
+	timer_init();
+
 	err = request_irq(TIMER_IRQ, um_timer, IRQF_DISABLED, "timer", NULL);
 	if (err != 0)
 		printk(KERN_ERR "register_timer : request_irq failed - "
Index: linux-2.6.20/arch/um/os-Linux/irq.c
===================================================================
--- linux-2.6.20.orig/arch/um/os-Linux/irq.c	2007-09-19 12:24:52.000000000 -0400
+++ linux-2.6.20/arch/um/os-Linux/irq.c	2007-09-19 12:25:06.000000000 -0400
@@ -145,10 +145,6 @@ void init_irq_signals(int on_sigstack)
 
 	flags = on_sigstack ? SA_ONSTACK : 0;
 
-	set_handler(SIGVTALRM, (__sighandler_t) alarm_handler,
-		    flags | SA_RESTART, SIGUSR1, SIGIO, SIGWINCH, SIGALRM, -1);
-	set_handler(SIGALRM, (__sighandler_t) alarm_handler,
-		    flags | SA_RESTART, SIGUSR1, SIGIO, SIGWINCH, SIGALRM, -1);
 	set_handler(SIGIO, (__sighandler_t) sig_handler, flags | SA_RESTART,
 		    SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
 	signal(SIGWINCH, SIG_IGN);
Index: linux-2.6.20/arch/um/include/os.h
===================================================================
--- linux-2.6.20.orig/arch/um/include/os.h	2007-09-19 12:25:05.000000000 -0400
+++ linux-2.6.20/arch/um/include/os.h	2007-09-19 12:25:06.000000000 -0400
@@ -227,6 +227,7 @@ extern int set_umid(char *name);
 extern char *get_umid(void);
 
 /* signal.c */
+extern void timer_init(void);
 extern void set_sigstack(void *sig_stack, int size);
 extern void remove_sigstack(void);
 extern void set_handler(int sig, void (*handler)(int), int flags, ...);
Index: linux-2.6.20/arch/um/os-Linux/signal.c
===================================================================
--- linux-2.6.20.orig/arch/um/os-Linux/signal.c	2007-09-19 12:25:05.000000000 -0400
+++ linux-2.6.20/arch/um/os-Linux/signal.c	2007-09-19 12:25:06.000000000 -0400
@@ -85,6 +85,16 @@ void alarm_handler(int sig, struct sigco
 	set_signals(enabled);
 }
 
+void timer_init(void)
+{
+	set_handler(SIGVTALRM, (__sighandler_t) alarm_handler,
+		    SA_ONSTACK | SA_RESTART, SIGUSR1, SIGIO, SIGWINCH,
+		    SIGALRM, -1);
+	set_handler(SIGALRM, (__sighandler_t) alarm_handler,
+		    SA_ONSTACK | SA_RESTART, SIGUSR1, SIGIO, SIGWINCH,
+		    SIGALRM, -1);
+}
+
 void set_sigstack(void *sig_stack, int size)
 {
 	stack_t stack = ((stack_t) { .ss_flags	= 0,
-
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