Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/kyle/parisc-2.6

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/kyle/parisc-2.6:
  parisc: add tty driver to PDC console
  drivers/parisc/iosapic.c: Remove unnecessary kzalloc cast
  parisc: remove homegrown L1_CACHE_ALIGN macro
  arch/parisc: Removing undead ifdef CONFIG_PA20
  parisc: unwind - optimise linked-list searches for modules
  parisc: change to new flag variable
  drivers/char/agp/parisc-agp.c: eliminate memory leak
  parisc: kill __do_IRQ
  parisc: convert eisa interrupts to flow handlers
  parisc: convert gsc and dino pci interrupts to flow handlers
  parisc: convert suckyio interrupts to flow handlers
  parisc: convert iosapic interrupts to proper flow handlers
  parisc: convert cpu interrupts to proper flow handlers
  parisc: lay groundwork for killing __do_IRQ
  parisc: add prlimit64 syscall
  parisc: squelch warning when using dev_get_stats

5 files changed, 157 insertions, 34 deletions

diff --git a/arch/parisc/kernel/irq.c b/arch/parisc/kernel/irq.c
index efbcee5..5024f64 100644
--- a/arch/parisc/kernel/irq.c
+++ b/arch/parisc/kernel/irq.c
@@ -52,7 +52,7 @@ static volatile unsigned long cpu_eiem = 0;
 */
 static DEFINE_PER_CPU(unsigned long, local_ack_eiem) = ~0UL;
 
-static void cpu_disable_irq(unsigned int irq)
+static void cpu_mask_irq(unsigned int irq)
 {
 	unsigned long eirr_bit = EIEM_MASK(irq);
 
@@ -63,7 +63,7 @@ static void cpu_disable_irq(unsigned int irq)
 	 * then gets disabled */
 }
 
-static void cpu_enable_irq(unsigned int irq)
+static void cpu_unmask_irq(unsigned int irq)
 {
 	unsigned long eirr_bit = EIEM_MASK(irq);
 
@@ -75,12 +75,6 @@ static void cpu_enable_irq(unsigned int irq)
 	smp_send_all_nop();
 }
 
-static unsigned int cpu_startup_irq(unsigned int irq)
-{
-	cpu_enable_irq(irq);
-	return 0;
-}
-
 void no_ack_irq(unsigned int irq) { }
 void no_end_irq(unsigned int irq) { }
 
@@ -99,7 +93,7 @@ void cpu_ack_irq(unsigned int irq)
 	mtctl(mask, 23);
 }
 
-void cpu_end_irq(unsigned int irq)
+void cpu_eoi_irq(unsigned int irq)
 {
 	unsigned long mask = EIEM_MASK(irq);
 	int cpu = smp_processor_id();
@@ -146,12 +140,10 @@ static int cpu_set_affinity_irq(unsigned int irq, const struct cpumask *dest)
 
 static struct irq_chip cpu_interrupt_type = {
 	.name		= "CPU",
-	.startup	= cpu_startup_irq,
-	.shutdown	= cpu_disable_irq,
-	.enable		= cpu_enable_irq,
-	.disable	= cpu_disable_irq,
+	.mask		= cpu_mask_irq,
+	.unmask		= cpu_unmask_irq,
 	.ack		= cpu_ack_irq,
-	.end		= cpu_end_irq,
+	.eoi		= cpu_eoi_irq,
 #ifdef CONFIG_SMP
 	.set_affinity	= cpu_set_affinity_irq,
 #endif
@@ -247,10 +239,11 @@ int cpu_claim_irq(unsigned int irq, struct irq_chip *type, void *data)
 	if (irq_desc[irq].chip != &cpu_interrupt_type)
 		return -EBUSY;
 
+	/* for iosapic interrupts */
 	if (type) {
-		irq_desc[irq].chip = type;
-		irq_desc[irq].chip_data = data;
-		cpu_interrupt_type.enable(irq);
+		set_irq_chip_and_handler(irq, type, handle_level_irq);
+		set_irq_chip_data(irq, data);
+		cpu_unmask_irq(irq);
 	}
 	return 0;
 }
@@ -368,7 +361,7 @@ void do_cpu_irq_mask(struct pt_regs *regs)
 		goto set_out;
 	}
 #endif
-	__do_IRQ(irq);
+	generic_handle_irq(irq);
 
  out:
 	irq_exit();
@@ -398,14 +391,15 @@ static void claim_cpu_irqs(void)
 {
 	int i;
 	for (i = CPU_IRQ_BASE; i <= CPU_IRQ_MAX; i++) {
-		irq_desc[i].chip = &cpu_interrupt_type;
+		set_irq_chip_and_handler(i, &cpu_interrupt_type,
+			handle_level_irq);
 	}
 
-	irq_desc[TIMER_IRQ].action = &timer_action;
-	irq_desc[TIMER_IRQ].status = IRQ_PER_CPU;
+	set_irq_handler(TIMER_IRQ, handle_percpu_irq);
+	setup_irq(TIMER_IRQ, &timer_action);
 #ifdef CONFIG_SMP
-	irq_desc[IPI_IRQ].action = &ipi_action;
-	irq_desc[IPI_IRQ].status = IRQ_PER_CPU;
+	set_irq_handler(IPI_IRQ, handle_percpu_irq);
+	setup_irq(IPI_IRQ, &ipi_action);
 #endif
 }
 
@@ -423,3 +417,4 @@ void __init init_IRQ(void)
         set_eiem(cpu_eiem);	/* EIEM : enable all external intr */
 
 }
+
diff --git a/arch/parisc/kernel/pdc_cons.c b/arch/parisc/kernel/pdc_cons.c
index 1ff366c..66d1f17 100644
--- a/arch/parisc/kernel/pdc_cons.c
+++ b/arch/parisc/kernel/pdc_cons.c
@@ -12,6 +12,7 @@
  *    Copyright (C) 2001 Helge Deller <deller at parisc-linux.org>
  *    Copyright (C) 2001 Thomas Bogendoerfer <tsbogend at parisc-linux.org>
  *    Copyright (C) 2002 Randolph Chung <tausq with parisc-linux.org>
+ *    Copyright (C) 2010 Guy Martin <gmsoft at tuxicoman.be>
  *
  *
  *    This program is free software; you can redistribute it and/or modify
@@ -31,12 +32,11 @@
 
 /*
  *  The PDC console is a simple console, which can be used for debugging 
- *  boot related problems on HP PA-RISC machines.
+ *  boot related problems on HP PA-RISC machines. It is also useful when no
+ *  other console works.
  *
  *  This code uses the ROM (=PDC) based functions to read and write characters
  *  from and to PDC's boot path.
- *  Since all character read from that path must be polled, this code never
- *  can or will be a fully functional linux console.
  */
 
 /* Define EARLY_BOOTUP_DEBUG to debug kernel related boot problems. 
@@ -53,6 +53,7 @@
 #include <asm/pdc.h>		/* for iodc_call() proto and friends */
 
 static DEFINE_SPINLOCK(pdc_console_lock);
+static struct console pdc_cons;
 
 static void pdc_console_write(struct console *co, const char *s, unsigned count)
 {
@@ -85,12 +86,138 @@ static int pdc_console_setup(struct console *co, char *options)
 
 #if defined(CONFIG_PDC_CONSOLE)
 #include <linux/vt_kern.h>
+#include <linux/tty_flip.h>
+
+#define PDC_CONS_POLL_DELAY (30 * HZ / 1000)
+
+static struct timer_list pdc_console_timer;
+
+extern struct console * console_drivers;
+
+static int pdc_console_tty_open(struct tty_struct *tty, struct file *filp)
+{
+
+	mod_timer(&pdc_console_timer, jiffies + PDC_CONS_POLL_DELAY);
+
+	return 0;
+}
+
+static void pdc_console_tty_close(struct tty_struct *tty, struct file *filp)
+{
+	if (!tty->count)
+		del_timer(&pdc_console_timer);
+}
+
+static int pdc_console_tty_write(struct tty_struct *tty, const unsigned char *buf, int count)
+{
+	pdc_console_write(NULL, buf, count);
+	return count;
+}
+
+static int pdc_console_tty_write_room(struct tty_struct *tty)
+{
+	return 32768; /* no limit, no buffer used */
+}
+
+static int pdc_console_tty_chars_in_buffer(struct tty_struct *tty)
+{
+	return 0; /* no buffer */
+}
+
+static struct tty_driver *pdc_console_tty_driver;
+
+static const struct tty_operations pdc_console_tty_ops = {
+	.open = pdc_console_tty_open,
+	.close = pdc_console_tty_close,
+	.write = pdc_console_tty_write,
+	.write_room = pdc_console_tty_write_room,
+	.chars_in_buffer = pdc_console_tty_chars_in_buffer,
+};
+
+static void pdc_console_poll(unsigned long unused)
+{
+
+	int data, count = 0;
+
+	struct tty_struct *tty = pdc_console_tty_driver->ttys[0];
+
+	if (!tty)
+		return;
+
+	while (1) {
+		data = pdc_console_poll_key(NULL);
+		if (data == -1)
+			break;
+		tty_insert_flip_char(tty, data & 0xFF, TTY_NORMAL);
+		count ++;
+	}
+
+	if (count)
+		tty_flip_buffer_push(tty);
+
+	if (tty->count && (pdc_cons.flags & CON_ENABLED))
+		mod_timer(&pdc_console_timer, jiffies + PDC_CONS_POLL_DELAY);
+}
+
+static int __init pdc_console_tty_driver_init(void)
+{
+
+	int err;
+	struct tty_driver *drv;
+
+	/* Check if the console driver is still registered.
+	 * It is unregistered if the pdc console was not selected as the
+	 * primary console. */
+
+	struct console *tmp = console_drivers;
+
+	for (tmp = console_drivers; tmp; tmp = tmp->next)
+		if (tmp == &pdc_cons)
+			break;
+
+	if (!tmp) {
+		printk(KERN_INFO "PDC console driver not registered anymore, not creating %s\n", pdc_cons.name);
+		return -ENODEV;
+	}
+
+	printk(KERN_INFO "The PDC console driver is still registered, removing CON_BOOT flag\n");
+	pdc_cons.flags &= ~CON_BOOT;
+
+	drv = alloc_tty_driver(1);
+
+	if (!drv)
+		return -ENOMEM;
+
+	drv->driver_name = "pdc_cons";
+	drv->name = "ttyB";
+	drv->major = MUX_MAJOR;
+	drv->minor_start = 0;
+	drv->type = TTY_DRIVER_TYPE_SYSTEM;
+	drv->init_termios = tty_std_termios;
+	drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
+	tty_set_operations(drv, &pdc_console_tty_ops);
+
+	err = tty_register_driver(drv);
+	if (err) {
+		printk(KERN_ERR "Unable to register the PDC console TTY driver\n");
+		return err;
+	}
+
+	pdc_console_tty_driver = drv;
+
+	/* No need to initialize the pdc_console_timer if tty isn't allocated */
+	init_timer(&pdc_console_timer);
+	pdc_console_timer.function = pdc_console_poll;
+
+	return 0;
+}
+
+module_init(pdc_console_tty_driver_init);
 
 static struct tty_driver * pdc_console_device (struct console *c, int *index)
 {
-	extern struct tty_driver console_driver;
-	*index = c->index ? c->index-1 : fg_console;
-	return &console_driver;
+	*index = c->index;
+	return pdc_console_tty_driver;
 }
 #else
 #define pdc_console_device NULL
@@ -101,7 +228,7 @@ static struct console pdc_cons = {
 	.write =	pdc_console_write,
 	.device =	pdc_console_device,
 	.setup =	pdc_console_setup,
-	.flags =	CON_BOOT | CON_PRINTBUFFER | CON_ENABLED,
+	.flags =	CON_BOOT | CON_PRINTBUFFER,
 	.index =	-1,
 };
 
diff --git a/arch/parisc/kernel/syscall_table.S b/arch/parisc/kernel/syscall_table.S
index 3d52c97..74867df 100644
--- a/arch/parisc/kernel/syscall_table.S
+++ b/arch/parisc/kernel/syscall_table.S
@@ -419,6 +419,7 @@
 	ENTRY_SAME(perf_event_open)
 	ENTRY_COMP(recvmmsg)
 	ENTRY_SAME(accept4)		/* 320 */
+	ENTRY_SAME(prlimit64)
 
 	/* Nothing yet */
 
diff --git a/arch/parisc/kernel/unaligned.c b/arch/parisc/kernel/unaligned.c
index 92d977b..234e368 100644
--- a/arch/parisc/kernel/unaligned.c
+++ b/arch/parisc/kernel/unaligned.c
@@ -619,15 +619,12 @@ void handle_unaligned(struct pt_regs *regs)
 		flop=1;
 		ret = emulate_std(regs, R2(regs->iir),1);
 		break;
-
-#ifdef CONFIG_PA20
 	case OPCODE_LDD_L:
 		ret = emulate_ldd(regs, R2(regs->iir),0);
 		break;
 	case OPCODE_STD_L:
 		ret = emulate_std(regs, R2(regs->iir),0);
 		break;
-#endif
 	}
 #endif
 	switch (regs->iir & OPCODE3_MASK)
diff --git a/arch/parisc/kernel/unwind.c b/arch/parisc/kernel/unwind.c
index d58eac1..76ed62e 100644
--- a/arch/parisc/kernel/unwind.c
+++ b/arch/parisc/kernel/unwind.c
@@ -80,8 +80,11 @@ find_unwind_entry(unsigned long addr)
 			if (addr >= table->start && 
 			    addr <= table->end)
 				e = find_unwind_entry_in_table(table, addr);
-			if (e)
+			if (e) {
+				/* Move-to-front to exploit common traces */
+				list_move(&table->list, &unwind_tables);
 				break;
+			}
 		}
 
 	return e;