[PATCH] uml: timer initialization cleanup

This cleans up the mess that is the timer initialization.  There used to be
two timer handlers - one that basically ran during delay loop calibration and
one that handled the timer afterwards.  There were also two sets of timer
initialization code - one that starts in user code and calls into the kernel
side of the house, and one that starts in kernel code and calls user code.

This eliminates one timer handler and consolidates the two sets of
initialization code.

[akpm@osdl.org: use new INTF_ flags]
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, 26 insertions, 38 deletions

diff --git a/arch/um/kernel/time_kern.c b/arch/um/kernel/time_kern.c
index d7e044b5e5ee..8e56c58320ba 100644
--- a/arch/um/kernel/time_kern.c
+++ b/arch/um/kernel/time_kern.c
@@ -84,29 +84,6 @@ void timer_irq(union uml_pt_regs *regs)
 	}
 }
 
-
-void time_init_kern(void)
-{
-	long long nsecs;
-
-	nsecs = os_nsecs();
-	set_normalized_timespec(&wall_to_monotonic, -nsecs / BILLION,
-				-nsecs % BILLION);
-}
-
-void do_boot_timer_handler(struct sigcontext * sc)
-{
-	unsigned long flags;
-	struct pt_regs regs;
-
-	CHOOSE_MODE((void) (UPT_SC(&regs.regs) = sc),
-		    (void) (regs.regs.skas.is_user = 0));
-
-	write_seqlock_irqsave(&xtime_lock, flags);
-	do_timer(&regs);
-	write_sequnlock_irqrestore(&xtime_lock, flags);
-}
-
 static DEFINE_SPINLOCK(timer_spinlock);
 
 static unsigned long long local_offset = 0;
@@ -142,6 +119,32 @@ irqreturn_t um_timer(int irq, void *dev, struct pt_regs *regs)
 	return IRQ_HANDLED;
 }
 
+static void register_timer(void)
+{
+	int err;
+
+	err = request_irq(TIMER_IRQ, um_timer, IRQF_DISABLED, "timer", NULL);
+	if(err != 0)
+		printk(KERN_ERR "timer_init : request_irq failed - "
+		       "errno = %d\n", -err);
+
+	timer_irq_inited = 1;
+
+	user_time_init();
+}
+
+extern void (*late_time_init)(void);
+
+void time_init(void)
+{
+	long long nsecs;
+
+	nsecs = os_nsecs();
+	set_normalized_timespec(&wall_to_monotonic, -nsecs / BILLION,
+				-nsecs % BILLION);
+	late_time_init = register_timer;
+}
+
 void do_gettimeofday(struct timeval *tv)
 {
 	unsigned long long nsecs = get_time();
@@ -189,18 +192,3 @@ void timer_handler(int sig, union uml_pt_regs *regs)
 	if(current_thread->cpu == 0)
 		timer_irq(regs);
 }
-
-int __init timer_init(void)
-{
-	int err;
-
-	user_time_init();
-	err = request_irq(TIMER_IRQ, um_timer, IRQF_DISABLED, "timer", NULL);
-	if(err != 0)
-		printk(KERN_ERR "timer_init : request_irq failed - "
-		       "errno = %d\n", -err);
-	timer_irq_inited = 1;
-	return(0);
-}
-
-arch_initcall(timer_init);