From 2ea5bc5e5bb51492f189bba44045e0de7decf4a0 Mon Sep 17 00:00:00 2001
From: Jeff Dike <jdike@addtoit.com>
Date: Thu, 10 May 2007 22:22:32 -0700
Subject: uml: tidy IRQ code

Some tidying of the irq code before introducing irq stacks.  Mostly
style fixes, but the timer handler calls the timer code directly
rather than going through the generic sig_handler_common_skas.

Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/arch/um/kernel/init_task.c b/arch/um/kernel/init_task.c
index 4506c7f..f5385a3 100644
--- a/arch/um/kernel/init_task.c
+++ b/arch/um/kernel/init_task.c
@@ -46,14 +46,3 @@ void unprotect_stack(unsigned long stack)
 {
 	os_protect_memory((void *) stack, THREAD_SIZE, 1, 1, 0);
 }
-
-/*
- * 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:
- */
diff --git a/arch/um/kernel/irq.c b/arch/um/kernel/irq.c
index 8f2ed36..a9651a1 100644
--- a/arch/um/kernel/irq.c
+++ b/arch/um/kernel/irq.c
@@ -1,4 +1,4 @@
-/* 
+/*
  * Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
  * Licensed under the GPL
  * Derived (i.e. mostly copied) from arch/i386/kernel/irq.c:
@@ -53,7 +53,7 @@ int show_interrupts(struct seq_file *p, void *v)
 	if (i < NR_IRQS) {
 		spin_lock_irqsave(&irq_desc[i].lock, flags);
 		action = irq_desc[i].action;
-		if (!action) 
+		if (!action)
 			goto skip;
 		seq_printf(p, "%3d: ",i);
 #ifndef CONFIG_SMP
diff --git a/arch/um/os-Linux/signal.c b/arch/um/os-Linux/signal.c
index 48d4934..420ee86 100644
--- a/arch/um/os-Linux/signal.c
+++ b/arch/um/os-Linux/signal.c
@@ -61,15 +61,19 @@ void sig_handler(int sig, struct sigcontext *sc)
 
 static void real_alarm_handler(int sig, struct sigcontext *sc)
 {
+	union uml_pt_regs regs;
+
 	if(sig == SIGALRM)
 		switch_timers(0);
 
-	CHOOSE_MODE_PROC(sig_handler_common_tt, sig_handler_common_skas,
-			 sig, sc);
+	if(sc != NULL)
+		copy_sc(&regs, sc);
+	regs.skas.is_user = 0;
+	unblock_signals();
+	timer_handler(sig, &regs);
 
 	if(sig == SIGALRM)
 		switch_timers(1);
-
 }
 
 void alarm_handler(int sig, struct sigcontext *sc)
diff --git a/arch/um/os-Linux/skas/process.c b/arch/um/os-Linux/skas/process.c
index 3492886..f9d2f85 100644
--- a/arch/um/os-Linux/skas/process.c
+++ b/arch/um/os-Linux/skas/process.c
@@ -288,7 +288,8 @@ int start_userspace(unsigned long stub_stack)
 void userspace(union uml_pt_regs *regs)
 {
 	int err, status, op, pid = userspace_pid[0];
-	int local_using_sysemu; /*To prevent races if using_sysemu changes under us.*/
+	/* To prevent races if using_sysemu changes under us.*/
+	int local_using_sysemu;
 
 	while(1){
 		restore_registers(pid, regs);
@@ -296,7 +297,8 @@ void userspace(union uml_pt_regs *regs)
 		/* Now we set local_using_sysemu to be used for one loop */
 		local_using_sysemu = get_using_sysemu();
 
-		op = SELECT_PTRACE_OPERATION(local_using_sysemu, singlestepping(NULL));
+		op = SELECT_PTRACE_OPERATION(local_using_sysemu,
+					     singlestepping(NULL));
 
 		err = ptrace(op, pid, 0, 0);
 		if(err)
-- 
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