Merge branch 'sched/locking' into sched/core

Merge reason: the rq locking changes are stable,
              propagate them into the .40 queue.

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

Documentation/feature-removal-schedule.txt

@@ -387,26 +387,6 @@ Who:	Tejun Heo <tj@kernel.org>
 
 ----------------------------
 
-What:	Support for lcd_switch and display_get in asus-laptop driver
-When:	March 2010
-Why:	These two features use non-standard interfaces. There are the
-	only features that really need multiple path to guess what's
-	the right method name on a specific laptop.
-
-	Removing them will allow to remove a lot of code an significantly
-	clean the drivers.
-
-	This will affect the backlight code which won't be able to know
-	if the backlight is on or off. The platform display file will also be
-	write only (like the one in eeepc-laptop).
-
-	This should'nt affect a lot of user because they usually know
-	when their display is on or off.
-
-Who:	Corentin Chary <corentin.chary@gmail.com>
-
-----------------------------
-
 What:	sysfs-class-rfkill state file
 When:	Feb 2014
 Files:	net/rfkill/core.c

MAINTAINERS

@@ -6916,6 +6916,13 @@ T:	git git://git.kernel.org/pub/scm/linux/kernel/git/mjg59/platform-drivers-x86.
 S:	Maintained
 F:	drivers/platform/x86
 
+XEN NETWORK BACKEND DRIVER
+M:	Ian Campbell <ian.campbell@citrix.com>
+L:	xen-devel@lists.xensource.com (moderated for non-subscribers)
+L:	netdev@vger.kernel.org
+S:	Supported
+F:	drivers/net/xen-netback/*
+
 XEN PCI SUBSYSTEM
 M:	Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
 L:	xen-devel@lists.xensource.com (moderated for non-subscribers)

Makefile

@@ -1,7 +1,7 @@
 VERSION = 2
 PATCHLEVEL = 6
 SUBLEVEL = 39
-EXTRAVERSION = -rc2
+EXTRAVERSION = -rc3
 NAME = Flesh-Eating Bats with Fangs
 
 # *DOCUMENTATION*

arch/alpha/kernel/smp.c

@@ -585,8 +585,7 @@ handle_ipi(struct pt_regs *regs)
 
 		switch (which) {
 		case IPI_RESCHEDULE:
-			/* Reschedule callback.  Everything to be done
-			   is done by the interrupt return path.  */
+			scheduler_ipi();
 			break;
 
 		case IPI_CALL_FUNC:

arch/arm/kernel/smp.c

@@ -560,10 +560,7 @@ asmlinkage void __exception_irq_entry do_IPI(int ipinr, struct pt_regs *regs)
 		break;
 
 	case IPI_RESCHEDULE:
-		/*
-		 * nothing more to do - eveything is
-		 * done on the interrupt return path
-		 */
+		scheduler_ipi();
 		break;
 
 	case IPI_CALL_FUNC:

arch/avr32/include/asm/setup.h

@@ -94,6 +94,13 @@ struct tag_ethernet {
 
 #define ETH_INVALID_PHY	0xff
 
+/* board information */
+#define ATAG_BOARDINFO	0x54410008
+
+struct tag_boardinfo {
+	u32	board_number;
+};
+
 struct tag {
 	struct tag_header hdr;
 	union {
@@ -102,6 +109,7 @@ struct tag {
 		struct tag_cmdline cmdline;
 		struct tag_clock clock;
 		struct tag_ethernet ethernet;
+		struct tag_boardinfo boardinfo;
 	} u;
 };
 
@@ -128,6 +136,7 @@ extern struct tag *bootloader_tags;
 
 extern resource_size_t fbmem_start;
 extern resource_size_t fbmem_size;
+extern u32 board_number;
 
 void setup_processor(void);
 

arch/avr32/kernel/setup.c

@@ -390,6 +390,21 @@ static int __init parse_tag_clock(struct tag *tag)
 }
 __tagtable(ATAG_CLOCK, parse_tag_clock);
 
+/*
+ * The board_number correspond to the bd->bi_board_number in U-Boot. This
+ * parameter is only available during initialisation and can be used in some
+ * kind of board identification.
+ */
+u32 __initdata board_number;
+
+static int __init parse_tag_boardinfo(struct tag *tag)
+{
+	board_number = tag->u.boardinfo.board_number;
+
+	return 0;
+}
+__tagtable(ATAG_BOARDINFO, parse_tag_boardinfo);
+
 /*
  * Scan the tag table for this tag, and call its parse function. The
  * tag table is built by the linker from all the __tagtable

arch/avr32/kernel/traps.c

@@ -95,28 +95,6 @@ void _exception(long signr, struct pt_regs *regs, int code,
 	info.si_code = code;
 	info.si_addr = (void __user *)addr;
 	force_sig_info(signr, &info, current);
-
-	/*
-	 * Init gets no signals that it doesn't have a handler for.
-	 * That's all very well, but if it has caused a synchronous
-	 * exception and we ignore the resulting signal, it will just
-	 * generate the same exception over and over again and we get
-	 * nowhere.  Better to kill it and let the kernel panic.
-	 */
-	if (is_global_init(current)) {
-		__sighandler_t handler;
-
-		spin_lock_irq(&current->sighand->siglock);
-		handler = current->sighand->action[signr-1].sa.sa_handler;
-		spin_unlock_irq(&current->sighand->siglock);
-		if (handler == SIG_DFL) {
-			/* init has generated a synchronous exception
-			   and it doesn't have a handler for the signal */
-			printk(KERN_CRIT "init has generated signal %ld "
-			       "but has no handler for it\n", signr);
-			do_exit(signr);
-		}
-	}
 }
 
 asmlinkage void do_nmi(unsigned long ecr, struct pt_regs *regs)

arch/avr32/mach-at32ap/clock.c

@@ -35,22 +35,30 @@ void at32_clk_register(struct clk *clk)
 	spin_unlock(&clk_list_lock);
 }
 
+static struct clk *__clk_get(struct device *dev, const char *id)
+{
+	struct clk *clk;
+
+	list_for_each_entry(clk, &at32_clock_list, list) {
+		if (clk->dev == dev && strcmp(id, clk->name) == 0) {
+			return clk;
+		}
+	}
+
+	return ERR_PTR(-ENOENT);
+}
+
 struct clk *clk_get(struct device *dev, const char *id)
 {
 	struct clk *clk;
 
 	spin_lock(&clk_list_lock);
-
-	list_for_each_entry(clk, &at32_clock_list, list) {
-		if (clk->dev == dev && strcmp(id, clk->name) == 0) {
-			spin_unlock(&clk_list_lock);
-			return clk;
-		}
-	}
-
+	clk = __clk_get(dev, id);
 	spin_unlock(&clk_list_lock);
-	return ERR_PTR(-ENOENT);
+
+	return clk;
 }
+
 EXPORT_SYMBOL(clk_get);
 
 void clk_put(struct clk *clk)
@@ -257,15 +265,15 @@ static int clk_show(struct seq_file *s, void *unused)
 	spin_lock(&clk_list_lock);
 
 	/* show clock tree as derived from the three oscillators */
-	clk = clk_get(NULL, "osc32k");
+	clk = __clk_get(NULL, "osc32k");
 	dump_clock(clk, &r);
 	clk_put(clk);
 
-	clk = clk_get(NULL, "osc0");
+	clk = __clk_get(NULL, "osc0");
 	dump_clock(clk, &r);
 	clk_put(clk);
 
-	clk = clk_get(NULL, "osc1");
+	clk = __clk_get(NULL, "osc1");
 	dump_clock(clk, &r);
 	clk_put(clk);
 

arch/avr32/mach-at32ap/extint.c

@@ -61,34 +61,34 @@ struct eic {
 static struct eic *nmi_eic;
 static bool nmi_enabled;
 
-static void eic_ack_irq(struct irq_chip *d)
+static void eic_ack_irq(struct irq_data *d)
 {
-	struct eic *eic = irq_data_get_irq_chip_data(data);
+	struct eic *eic = irq_data_get_irq_chip_data(d);
 	eic_writel(eic, ICR, 1 << (d->irq - eic->first_irq));
 }
 
-static void eic_mask_irq(struct irq_chip *d)
+static void eic_mask_irq(struct irq_data *d)
 {
-	struct eic *eic = irq_data_get_irq_chip_data(data);
+	struct eic *eic = irq_data_get_irq_chip_data(d);
 	eic_writel(eic, IDR, 1 << (d->irq - eic->first_irq));
 }
 
-static void eic_mask_ack_irq(struct irq_chip *d)
+static void eic_mask_ack_irq(struct irq_data *d)
 {
-	struct eic *eic = irq_data_get_irq_chip_data(data);
+	struct eic *eic = irq_data_get_irq_chip_data(d);
 	eic_writel(eic, ICR, 1 << (d->irq - eic->first_irq));
 	eic_writel(eic, IDR, 1 << (d->irq - eic->first_irq));
 }
 
-static void eic_unmask_irq(struct irq_chip *d)
+static void eic_unmask_irq(struct irq_data *d)
 {
-	struct eic *eic = irq_data_get_irq_chip_data(data);
+	struct eic *eic = irq_data_get_irq_chip_data(d);
 	eic_writel(eic, IER, 1 << (d->irq - eic->first_irq));
 }
 
-static int eic_set_irq_type(struct irq_chip *d, unsigned int flow_type)
+static int eic_set_irq_type(struct irq_data *d, unsigned int flow_type)
 {
-	struct eic *eic = irq_data_get_irq_chip_data(data);
+	struct eic *eic = irq_data_get_irq_chip_data(d);
 	unsigned int irq = d->irq;
 	unsigned int i = irq - eic->first_irq;
 	u32 mode, edge, level;
@@ -191,7 +191,7 @@ static int __init eic_probe(struct platform_device *pdev)
 
 	regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	int_irq = platform_get_irq(pdev, 0);
-	if (!regs || !int_irq) {
+	if (!regs || (int)int_irq <= 0) {
 		dev_dbg(&pdev->dev, "missing regs and/or irq resource\n");
 		return -ENXIO;
 	}

arch/avr32/mach-at32ap/pio.c

@@ -257,7 +257,7 @@ static void gpio_irq_mask(struct irq_data *d)
 	pio_writel(pio, IDR, 1 << (gpio & 0x1f));
 }
 
-static void gpio_irq_unmask(struct irq_data *d))
+static void gpio_irq_unmask(struct irq_data *d)
 {
 	unsigned		gpio = irq_to_gpio(d->irq);
 	struct pio_device	*pio = &pio_dev[gpio >> 5];

arch/avr32/mach-at32ap/pm-at32ap700x.S

@@ -53,7 +53,7 @@ cpu_enter_idle:
 	st.w	r8[TI_flags], r9
 	unmask_interrupts
 	sleep	CPU_SLEEP_IDLE
-	.size	cpu_idle_sleep, . - cpu_idle_sleep
+	.size	cpu_enter_idle, . - cpu_enter_idle
 
 	/*
 	 * Common return path for PM functions that don't run from

arch/blackfin/mach-common/smp.c

@@ -164,6 +164,9 @@ static irqreturn_t ipi_handler_int1(int irq, void *dev_instance)
 	while (msg_queue->count) {
 		msg = &msg_queue->ipi_message[msg_queue->head];
 		switch (msg->type) {
+		case BFIN_IPI_RESCHEDULE:
+			scheduler_ipi();
+			break;
 		case BFIN_IPI_CALL_FUNC:
 			spin_unlock_irqrestore(&msg_queue->lock, flags);
 			ipi_call_function(cpu, msg);

arch/cris/arch-v32/kernel/smp.c

@@ -342,15 +342,18 @@ irqreturn_t crisv32_ipi_interrupt(int irq, void *dev_id)
 
 	ipi = REG_RD(intr_vect, irq_regs[smp_processor_id()], rw_ipi);
 
+	if (ipi.vector & IPI_SCHEDULE) {
+		scheduler_ipi();
+	}
 	if (ipi.vector & IPI_CALL) {
-	         func(info);
+		func(info);
 	}
 	if (ipi.vector & IPI_FLUSH_TLB) {
-		     if (flush_mm == FLUSH_ALL)
-			 __flush_tlb_all();
-		     else if (flush_vma == FLUSH_ALL)
+		if (flush_mm == FLUSH_ALL)
+			__flush_tlb_all();
+		else if (flush_vma == FLUSH_ALL)
 			__flush_tlb_mm(flush_mm);
-		     else
+		else
 			__flush_tlb_page(flush_vma, flush_addr);
 	}
 

arch/ia64/kernel/irq_ia64.c

@@ -31,6 +31,7 @@
 #include <linux/irq.h>
 #include <linux/ratelimit.h>
 #include <linux/acpi.h>
+#include <linux/sched.h>
 
 #include <asm/delay.h>
 #include <asm/intrinsics.h>
@@ -496,6 +497,7 @@ ia64_handle_irq (ia64_vector vector, struct pt_regs *regs)
 			smp_local_flush_tlb();
 			kstat_incr_irqs_this_cpu(irq, desc);
 		} else if (unlikely(IS_RESCHEDULE(vector))) {
+			scheduler_ipi();
 			kstat_incr_irqs_this_cpu(irq, desc);
 		} else {
 			ia64_setreg(_IA64_REG_CR_TPR, vector);

arch/ia64/xen/irq_xen.c

@@ -92,6 +92,8 @@ static unsigned short saved_irq_cnt;
 static int xen_slab_ready;
 
 #ifdef CONFIG_SMP
+#include <linux/sched.h>
+
 /* Dummy stub. Though we may check XEN_RESCHEDULE_VECTOR before __do_IRQ,
  * it ends up to issue several memory accesses upon percpu data and
  * thus adds unnecessary traffic to other paths.
@@ -99,7 +101,13 @@ static int xen_slab_ready;
 static irqreturn_t
 xen_dummy_handler(int irq, void *dev_id)
 {
+	return IRQ_HANDLED;
+}
 
+static irqreturn_t
+xen_resched_handler(int irq, void *dev_id)
+{
+	scheduler_ipi();
 	return IRQ_HANDLED;
 }
 
@@ -110,7 +118,7 @@ static struct irqaction xen_ipi_irqaction = {
 };
 
 static struct irqaction xen_resched_irqaction = {
-	.handler =	xen_dummy_handler,
+	.handler =	xen_resched_handler,
 	.flags =	IRQF_DISABLED,
 	.name =		"resched"
 };

arch/m32r/kernel/smp.c

@@ -122,8 +122,6 @@ void smp_send_reschedule(int cpu_id)
  *
  * Description:  This routine executes on CPU which received
  *               'RESCHEDULE_IPI'.
- *               Rescheduling is processed at the exit of interrupt
- *               operation.
  *
  * Born on Date: 2002.02.05
  *
@@ -138,7 +136,7 @@ void smp_send_reschedule(int cpu_id)
  *==========================================================================*/
 void smp_reschedule_interrupt(void)
 {
-	/* nothing to do */
+	scheduler_ipi();
 }
 
 /*==========================================================================*

arch/m68k/include/asm/unistd.h

@@ -343,10 +343,14 @@
 #define __NR_fanotify_init	337
 #define __NR_fanotify_mark	338
 #define __NR_prlimit64		339
+#define __NR_name_to_handle_at	340
+#define __NR_open_by_handle_at	341
+#define __NR_clock_adjtime	342
+#define __NR_syncfs		343
 
 #ifdef __KERNEL__
 
-#define NR_syscalls		340
+#define NR_syscalls		344
 
 #define __ARCH_WANT_IPC_PARSE_VERSION
 #define __ARCH_WANT_OLD_READDIR

arch/m68k/kernel/entry_mm.S

@@ -750,4 +750,8 @@ sys_call_table:
 	.long sys_fanotify_init
 	.long sys_fanotify_mark
 	.long sys_prlimit64
+	.long sys_name_to_handle_at	/* 340 */
+	.long sys_open_by_handle_at
+	.long sys_clock_adjtime
+	.long sys_syncfs
 

arch/m68k/kernel/syscalltable.S

@@ -358,6 +358,10 @@ ENTRY(sys_call_table)
 	.long sys_fanotify_init
 	.long sys_fanotify_mark
 	.long sys_prlimit64
+	.long sys_name_to_handle_at	/* 340 */
+	.long sys_open_by_handle_at
+	.long sys_clock_adjtime
+	.long sys_syncfs
 
 	.rept NR_syscalls-(.-sys_call_table)/4
 		.long sys_ni_syscall