Merge branch 'x86/apic' into irq/numa

Merge reason: both topics modify the APIC code but were able to do it in
              parallel so far. An upcoming patch generates a conflict so
              merge them to avoid the conflict.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

6 files changed, 141 insertions, 101 deletions

diff --git a/drivers/serial/crisv10.c b/drivers/serial/crisv10.c
index 7ba7d70f04d6..7be52fe288eb 100644
--- a/drivers/serial/crisv10.c
+++ b/drivers/serial/crisv10.c
@@ -23,16 +23,18 @@ static char *serial_version = "$Revision: 1.25 $";
 #include <linux/mm.h>
 #include <linux/slab.h>
 #include <linux/init.h>
-#include <asm/uaccess.h>
 #include <linux/kernel.h>
 #include <linux/mutex.h>
 #include <linux/bitops.h>
+#include <linux/seq_file.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/uaccess.h>
+#include <linux/io.h>
 
-#include <asm/io.h>
 #include <asm/irq.h>
 #include <asm/dma.h>
 #include <asm/system.h>
-#include <linux/delay.h>
 
 #include <arch/svinto.h>
 
@@ -456,7 +458,6 @@ static struct e100_serial rs_table[] = {
 
 #define NR_PORTS (sizeof(rs_table)/sizeof(struct e100_serial))
 
-static struct ktermios *serial_termios[NR_PORTS];
 #ifdef CONFIG_ETRAX_SERIAL_FAST_TIMER
 static struct fast_timer fast_timers[NR_PORTS];
 #endif
@@ -4257,151 +4258,132 @@ rs_open(struct tty_struct *tty, struct file * filp)
 	return 0;
 }
 
+#ifdef CONFIG_PROC_FS
 /*
  * /proc fs routines....
  */
 
-static int line_info(char *buf, struct e100_serial *info)
+static void seq_line_info(struct seq_file *m, struct e100_serial *info)
 {
-	char	stat_buf[30];
-	int	ret;
 	unsigned long tmp;
 
-	ret = sprintf(buf, "%d: uart:E100 port:%lX irq:%d",
-		      info->line, (unsigned long)info->ioport, info->irq);
+	seq_printf(m, "%d: uart:E100 port:%lX irq:%d",
+		   info->line, (unsigned long)info->ioport, info->irq);
 
 	if (!info->ioport || (info->type == PORT_UNKNOWN)) {
-		ret += sprintf(buf+ret, "\n");
-		return ret;
+		seq_printf(m, "\n");
+		return;
 	}
 
-	stat_buf[0] = 0;
-	stat_buf[1] = 0;
-	if (!E100_RTS_GET(info))
-		strcat(stat_buf, "|RTS");
-	if (!E100_CTS_GET(info))
-		strcat(stat_buf, "|CTS");
-	if (!E100_DTR_GET(info))
-		strcat(stat_buf, "|DTR");
-	if (!E100_DSR_GET(info))
-		strcat(stat_buf, "|DSR");
-	if (!E100_CD_GET(info))
-		strcat(stat_buf, "|CD");
-	if (!E100_RI_GET(info))
-		strcat(stat_buf, "|RI");
-
-	ret += sprintf(buf+ret, " baud:%d", info->baud);
-
-	ret += sprintf(buf+ret, " tx:%lu rx:%lu",
+	seq_printf(m, " baud:%d", info->baud);
+	seq_printf(m, " tx:%lu rx:%lu",
 		       (unsigned long)info->icount.tx,
 		       (unsigned long)info->icount.rx);
 	tmp = CIRC_CNT(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);
-	if (tmp) {
-		ret += sprintf(buf+ret, " tx_pend:%lu/%lu",
-			       (unsigned long)tmp,
-			       (unsigned long)SERIAL_XMIT_SIZE);
-	}
+	if (tmp)
+		seq_printf(m, " tx_pend:%lu/%lu",
+			   (unsigned long)tmp,
+			   (unsigned long)SERIAL_XMIT_SIZE);
 
-	ret += sprintf(buf+ret, " rx_pend:%lu/%lu",
-		       (unsigned long)info->recv_cnt,
-		       (unsigned long)info->max_recv_cnt);
+	seq_printf(m, " rx_pend:%lu/%lu",
+		   (unsigned long)info->recv_cnt,
+		   (unsigned long)info->max_recv_cnt);
 
 #if 1
 	if (info->port.tty) {
-
 		if (info->port.tty->stopped)
-			ret += sprintf(buf+ret, " stopped:%i",
-				       (int)info->port.tty->stopped);
+			seq_printf(m, " stopped:%i",
+				   (int)info->port.tty->stopped);
 		if (info->port.tty->hw_stopped)
-			ret += sprintf(buf+ret, " hw_stopped:%i",
-				       (int)info->port.tty->hw_stopped);
+			seq_printf(m, " hw_stopped:%i",
+				   (int)info->port.tty->hw_stopped);
 	}
 
 	{
 		unsigned char rstat = info->ioport[REG_STATUS];
-		if (rstat & IO_MASK(R_SERIAL0_STATUS, xoff_detect) )
-			ret += sprintf(buf+ret, " xoff_detect:1");
+		if (rstat & IO_MASK(R_SERIAL0_STATUS, xoff_detect))
+			seq_printf(m, " xoff_detect:1");
 	}
 
 #endif
 
-
-
-
 	if (info->icount.frame)
-		ret += sprintf(buf+ret, " fe:%lu",
-			       (unsigned long)info->icount.frame);
+		seq_printf(m, " fe:%lu", (unsigned long)info->icount.frame);
 
 	if (info->icount.parity)
-		ret += sprintf(buf+ret, " pe:%lu",
-			       (unsigned long)info->icount.parity);
+		seq_printf(m, " pe:%lu", (unsigned long)info->icount.parity);
 
 	if (info->icount.brk)
-		ret += sprintf(buf+ret, " brk:%lu",
-			       (unsigned long)info->icount.brk);
+		seq_printf(m, " brk:%lu", (unsigned long)info->icount.brk);
 
 	if (info->icount.overrun)
-		ret += sprintf(buf+ret, " oe:%lu",
-			       (unsigned long)info->icount.overrun);
+		seq_printf(m, " oe:%lu", (unsigned long)info->icount.overrun);
 
 	/*
 	 * Last thing is the RS-232 status lines
 	 */
-	ret += sprintf(buf+ret, " %s\n", stat_buf+1);
-	return ret;
+	if (!E100_RTS_GET(info))
+		seq_puts(m, "|RTS");
+	if (!E100_CTS_GET(info))
+		seq_puts(m, "|CTS");
+	if (!E100_DTR_GET(info))
+		seq_puts(m, "|DTR");
+	if (!E100_DSR_GET(info))
+		seq_puts(m, "|DSR");
+	if (!E100_CD_GET(info))
+		seq_puts(m, "|CD");
+	if (!E100_RI_GET(info))
+		seq_puts(m, "|RI");
+	seq_puts(m, "\n");
 }
 
-int rs_read_proc(char *page, char **start, off_t off, int count,
-		 int *eof, void *data)
+
+static int crisv10_proc_show(struct seq_file *m, void *v)
 {
-	int i, len = 0, l;
-	off_t	begin = 0;
+	int i;
 
-	len += sprintf(page, "serinfo:1.0 driver:%s\n",
-		       serial_version);
-	for (i = 0; i < NR_PORTS && len < 4000; i++) {
+	seq_printf(m, "serinfo:1.0 driver:%s\n", serial_version);
+
+	for (i = 0; i < NR_PORTS; i++) {
 		if (!rs_table[i].enabled)
 			continue;
-		l = line_info(page + len, &rs_table[i]);
-		len += l;
-		if (len+begin > off+count)
-			goto done;
-		if (len+begin < off) {
-			begin += len;
-			len = 0;
-		}
+		seq_line_info(m, &rs_table[i]);
 	}
 #ifdef DEBUG_LOG_INCLUDED
 	for (i = 0; i < debug_log_pos; i++) {
-		len += sprintf(page + len, "%-4i %lu.%lu ", i, debug_log[i].time, timer_data_to_ns(debug_log[i].timer_data));
-		len += sprintf(page + len, debug_log[i].string, debug_log[i].value);
-		if (len+begin > off+count)
-			goto done;
-		if (len+begin < off) {
-			begin += len;
-			len = 0;
-		}
+		seq_printf(m, "%-4i %lu.%lu ",
+			 i, debug_log[i].time,
+			 timer_data_to_ns(debug_log[i].timer_data));
+		seq_printf(m, debug_log[i].string, debug_log[i].value);
 	}
-	len += sprintf(page + len, "debug_log %i/%i  %li bytes\n",
-		       i, DEBUG_LOG_SIZE, begin+len);
+	seq_printf(m, "debug_log %i/%i\n", i, DEBUG_LOG_SIZE);
 	debug_log_pos = 0;
 #endif
+	return 0;
+}
 
-	*eof = 1;
-done:
-	if (off >= len+begin)
-		return 0;
-	*start = page + (off-begin);
-	return ((count < begin+len-off) ? count : begin+len-off);
+static int crisv10_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, crisv10_proc_show, NULL);
 }
 
+static const struct file_operations crisv10_proc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= crisv10_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+#endif
+
+
 /* Finally, routines used to initialize the serial driver. */
 
-static void
-show_serial_version(void)
+static void show_serial_version(void)
 {
 	printk(KERN_INFO
-	       "ETRAX 100LX serial-driver %s, (c) 2000-2004 Axis Communications AB\r\n",
+	       "ETRAX 100LX serial-driver %s, "
+	       "(c) 2000-2004 Axis Communications AB\r\n",
 	       &serial_version[11]); /* "$Revision: x.yy" */
 }
 
@@ -4425,13 +4407,14 @@ static const struct tty_operations rs_ops = {
 	.break_ctl = rs_break,
 	.send_xchar = rs_send_xchar,
 	.wait_until_sent = rs_wait_until_sent,
-	.read_proc = rs_read_proc,
 	.tiocmget = rs_tiocmget,
-	.tiocmset = rs_tiocmset
+	.tiocmset = rs_tiocmset,
+#ifdef CONFIG_PROC_FS
+	.proc_fops = &crisv10_proc_fops,
+#endif
 };
 
-static int __init
-rs_init(void)
+static int __init rs_init(void)
 {
 	int i;
 	struct e100_serial *info;
diff --git a/drivers/serial/jsm/jsm.h b/drivers/serial/jsm/jsm.h
index 8871aaa3dba6..c0a3e2734e24 100644
--- a/drivers/serial/jsm/jsm.h
+++ b/drivers/serial/jsm/jsm.h
@@ -130,8 +130,6 @@ struct jsm_board
 	struct pci_dev	*pci_dev;
 	u32		maxports;	/* MAX ports this board can handle */
 
-	spinlock_t	bd_lock;	/* Used to protect board */
-
 	spinlock_t	bd_intr_lock;	/* Used to protect the poller tasklet and
 					 * the interrupt routine from each other.
 					 */
diff --git a/drivers/serial/jsm/jsm_driver.c b/drivers/serial/jsm/jsm_driver.c
index d2d32a198629..b3604aa322a4 100644
--- a/drivers/serial/jsm/jsm_driver.c
+++ b/drivers/serial/jsm/jsm_driver.c
@@ -88,7 +88,6 @@ static int __devinit jsm_probe_one(struct pci_dev *pdev, const struct pci_device
 	else
 		brd->maxports = 2;
 
-	spin_lock_init(&brd->bd_lock);
 	spin_lock_init(&brd->bd_intr_lock);
 
 	/* store which revision we have */
diff --git a/drivers/serial/s3c6400.c b/drivers/serial/s3c6400.c
index 06936d13393f..3e3785233682 100644
--- a/drivers/serial/s3c6400.c
+++ b/drivers/serial/s3c6400.c
@@ -102,6 +102,7 @@ static struct s3c24xx_uart_info s3c6400_uart_inf = {
 	.name		= "Samsung S3C6400 UART",
 	.type		= PORT_S3C6400,
 	.fifosize	= 64,
+	.has_divslot	= 1,
 	.rx_fifomask	= S3C2440_UFSTAT_RXMASK,
 	.rx_fifoshift	= S3C2440_UFSTAT_RXSHIFT,
 	.rx_fifofull	= S3C2440_UFSTAT_RXFULL,
diff --git a/drivers/serial/samsung.c b/drivers/serial/samsung.c
index e06686ae858b..93b5d75db126 100644
--- a/drivers/serial/samsung.c
+++ b/drivers/serial/samsung.c
@@ -508,6 +508,7 @@ s3c24xx_serial_setsource(struct uart_port *port, struct s3c24xx_uart_clksrc *c)
 struct baud_calc {
 	struct s3c24xx_uart_clksrc	*clksrc;
 	unsigned int			 calc;
+	unsigned int			 divslot;
 	unsigned int			 quot;
 	struct clk			*src;
 };
@@ -517,6 +518,7 @@ static int s3c24xx_serial_calcbaud(struct baud_calc *calc,
 				   struct s3c24xx_uart_clksrc *clksrc,
 				   unsigned int baud)
 {
+	struct s3c24xx_uart_port *ourport = to_ourport(port);
 	unsigned long rate;
 
 	calc->src = clk_get(port->dev, clksrc->name);
@@ -527,8 +529,24 @@ static int s3c24xx_serial_calcbaud(struct baud_calc *calc,
 	rate /= clksrc->divisor;
 
 	calc->clksrc = clksrc;
-	calc->quot = (rate + (8 * baud)) / (16 * baud);
-	calc->calc = (rate / (calc->quot * 16));
+
+	if (ourport->info->has_divslot) {
+		unsigned long div = rate / baud;
+
+		/* The UDIVSLOT register on the newer UARTs allows us to
+		 * get a divisor adjustment of 1/16th on the baud clock.
+		 *
+		 * We don't keep the UDIVSLOT value (the 16ths we calculated
+		 * by not multiplying the baud by 16) as it is easy enough
+		 * to recalculate.
+		 */
+
+		calc->quot = div / 16;
+		calc->calc = rate / div;
+	} else {
+		calc->quot = (rate + (8 * baud)) / (16 * baud);
+		calc->calc = (rate / (calc->quot * 16));
+	}
 
 	calc->quot--;
 	return 1;
@@ -611,6 +629,30 @@ static unsigned int s3c24xx_serial_getclk(struct uart_port *port,
 	return best->quot;
 }
 
+/* udivslot_table[]
+ *
+ * This table takes the fractional value of the baud divisor and gives
+ * the recommended setting for the UDIVSLOT register.
+ */
+static u16 udivslot_table[16] = {
+	[0] = 0x0000,
+	[1] = 0x0080,
+	[2] = 0x0808,
+	[3] = 0x0888,
+	[4] = 0x2222,
+	[5] = 0x4924,
+	[6] = 0x4A52,
+	[7] = 0x54AA,
+	[8] = 0x5555,
+	[9] = 0xD555,
+	[10] = 0xD5D5,
+	[11] = 0xDDD5,
+	[12] = 0xDDDD,
+	[13] = 0xDFDD,
+	[14] = 0xDFDF,
+	[15] = 0xFFDF,
+};
+
 static void s3c24xx_serial_set_termios(struct uart_port *port,
 				       struct ktermios *termios,
 				       struct ktermios *old)
@@ -623,6 +665,7 @@ static void s3c24xx_serial_set_termios(struct uart_port *port,
 	unsigned int baud, quot;
 	unsigned int ulcon;
 	unsigned int umcon;
+	unsigned int udivslot = 0;
 
 	/*
 	 * We don't support modem control lines.
@@ -644,6 +687,7 @@ static void s3c24xx_serial_set_termios(struct uart_port *port,
 	/* check to see if we need  to change clock source */
 
 	if (ourport->clksrc != clksrc || ourport->baudclk != clk) {
+		dbg("selecting clock %p\n", clk);
 		s3c24xx_serial_setsource(port, clksrc);
 
 		if (ourport->baudclk != NULL && !IS_ERR(ourport->baudclk)) {
@@ -658,6 +702,13 @@ static void s3c24xx_serial_set_termios(struct uart_port *port,
 		ourport->baudclk_rate = clk ? clk_get_rate(clk) : 0;
 	}
 
+	if (ourport->info->has_divslot) {
+		unsigned int div = ourport->baudclk_rate / baud;
+
+		udivslot = udivslot_table[div & 15];
+		dbg("udivslot = %04x (div %d)\n", udivslot, div & 15);
+	}
+
 	switch (termios->c_cflag & CSIZE) {
 	case CS5:
 		dbg("config: 5bits/char\n");
@@ -697,12 +748,16 @@ static void s3c24xx_serial_set_termios(struct uart_port *port,
 
 	spin_lock_irqsave(&port->lock, flags);
 
-	dbg("setting ulcon to %08x, brddiv to %d\n", ulcon, quot);
+	dbg("setting ulcon to %08x, brddiv to %d, udivslot %08x\n",
+	    ulcon, quot, udivslot);
 
 	wr_regl(port, S3C2410_ULCON, ulcon);
 	wr_regl(port, S3C2410_UBRDIV, quot);
 	wr_regl(port, S3C2410_UMCON, umcon);
 
+	if (ourport->info->has_divslot)
+		wr_regl(port, S3C2443_DIVSLOT, udivslot);
+
 	dbg("uart: ulcon = 0x%08x, ucon = 0x%08x, ufcon = 0x%08x\n",
 	    rd_regl(port, S3C2410_ULCON),
 	    rd_regl(port, S3C2410_UCON),
diff --git a/drivers/serial/samsung.h b/drivers/serial/samsung.h
index 571d6b90d206..7afb94843a08 100644
--- a/drivers/serial/samsung.h
+++ b/drivers/serial/samsung.h
@@ -21,6 +21,10 @@ struct s3c24xx_uart_info {
 	unsigned long		tx_fifoshift;
 	unsigned long		tx_fifofull;
 
+	/* uart port features */
+
+	unsigned int		has_divslot:1;
+
 	/* clock source control */
 
 	int (*get_clksrc)(struct uart_port *, struct s3c24xx_uart_clksrc *clk);