[PATCH] uml: time initialization tidying

user_time_init_skas and user_time_init_tt were essentially the same.  So, this
merges them, deleting the mode-specific functions and declarations.

Signed-off-by: Jeff Dike <jdike@addtoit.com>
Cc: Paolo Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/um/include/time_user.h

@@ -8,11 +8,11 @@
 
 extern void timer(void);
 extern void switch_timers(int to_real);
-extern void set_interval(int timer_type);
 extern void idle_sleep(int secs);
 extern void enable_timer(void);
 extern void disable_timer(void);
 extern unsigned long time_lock(void);
 extern void time_unlock(unsigned long);
+extern void user_time_init(void);
 
 #endif

arch/um/kernel/skas/Makefile

@@ -4,10 +4,10 @@
 #
 
 obj-y := exec_kern.o mem.o mem_user.o mmu.o process.o process_kern.o \
-	syscall_kern.o syscall_user.o time.o tlb.o trap_user.o uaccess.o \
+	syscall_kern.o syscall_user.o tlb.o trap_user.o uaccess.o \
 
 subdir- := util
 
-USER_OBJS := process.o time.o
+USER_OBJS := process.o
 
 include arch/um/scripts/Makefile.rules

arch/um/kernel/skas/include/mode-skas.h

@@ -13,7 +13,6 @@ extern unsigned long exec_fp_regs[];
 extern unsigned long exec_fpx_regs[];
 extern int have_fpx_regs;
 
-extern void user_time_init_skas(void);
 extern void sig_handler_common_skas(int sig, void *sc_ptr);
 extern void halt_skas(void);
 extern void reboot_skas(void);

arch/um/kernel/time.c

@@ -33,7 +33,7 @@ void timer(void)
 	timeradd(&xtime, &local_offset, &xtime);
 }
 
-void set_interval(int timer_type)
+static void set_interval(int timer_type)
 {
 	int usec = 1000000/hz();
 	struct itimerval interval = ((struct itimerval) { { 0, usec },
@@ -45,12 +45,7 @@ void set_interval(int timer_type)
 
 void enable_timer(void)
 {
-	int usec = 1000000/hz();
-	struct itimerval enable = ((struct itimerval) { { 0, usec },
-							{ 0, usec }});
-	if(setitimer(ITIMER_VIRTUAL, &enable, NULL))
-		printk("enable_timer - setitimer failed, errno = %d\n",
-		       errno);
+	set_interval(ITIMER_VIRTUAL);
 }
 
 void disable_timer(void)
@@ -155,13 +150,15 @@ void idle_sleep(int secs)
 	nanosleep(&ts, NULL);
 }
 
-/*
- * 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:
- */
+/* XXX This partly duplicates init_irq_signals */
+
+void user_time_init(void)
+{
+	set_handler(SIGVTALRM, (__sighandler_t) alarm_handler,
+		    SA_ONSTACK | SA_RESTART, SIGUSR1, SIGIO, SIGWINCH,
+		    SIGALRM, SIGUSR2, -1);
+	set_handler(SIGALRM, (__sighandler_t) alarm_handler,
+		    SA_ONSTACK | SA_RESTART, SIGUSR1, SIGIO, SIGWINCH,
+		    SIGVTALRM, SIGUSR2, -1);
+	set_interval(ITIMER_VIRTUAL);
+}

arch/um/kernel/time_kern.c

@@ -162,7 +162,7 @@ int __init timer_init(void)
 {
 	int err;
 
-	CHOOSE_MODE(user_time_init_tt(), user_time_init_skas());
+	user_time_init();
 	err = request_irq(TIMER_IRQ, um_timer, SA_INTERRUPT, "timer", NULL);
 	if(err != 0)
 		printk(KERN_ERR "timer_init : request_irq failed - "

arch/um/kernel/tt/Makefile

@@ -4,11 +4,11 @@
 #
 
 obj-y = exec_kern.o exec_user.o gdb.o ksyms.o mem.o mem_user.o process_kern.o \
-	syscall_kern.o syscall_user.o time.o tlb.o tracer.o trap_user.o \
+	syscall_kern.o syscall_user.o tlb.o tracer.o trap_user.o \
 	uaccess.o uaccess_user.o
 
 obj-$(CONFIG_PT_PROXY) += gdb_kern.o ptproxy/
 
-USER_OBJS := gdb.o time.o tracer.o
+USER_OBJS := gdb.o tracer.o
 
 include arch/um/scripts/Makefile.rules

arch/um/kernel/tt/include/mode-tt.h

@@ -13,7 +13,6 @@ enum { OP_NONE, OP_EXEC, OP_FORK, OP_TRACE_ON, OP_REBOOT, OP_HALT, OP_CB };
 extern int tracing_pid;
 
 extern int tracer(int (*init_proc)(void *), void *sp);
-extern void user_time_init_tt(void);
 extern void sig_handler_common_tt(int sig, void *sc);
 extern void syscall_handler_tt(int sig, union uml_pt_regs *regs);
 extern void reboot_tt(void);