Merge branch 'master' into upstream-fixes

CREDITS

@@ -3279,7 +3279,7 @@ S: Sevilla 41005
 S: Spain
 
 N: Linus Torvalds
-E: torvalds@osdl.org
+E: torvalds@linux-foundation.org
 D: Original kernel hacker
 S: 12725 SW Millikan Way, Suite 400
 S: Beaverton, Oregon 97005

Documentation/SubmitChecklist

@@ -72,3 +72,7 @@ kernel patches.
 
     If the new code is substantial, addition of subsystem-specific fault
     injection might be appropriate.
+
+22: Newly-added code has been compiled with `gcc -W'.  This will generate
+    lots of noise, but is good for finding bugs like "warning: comparison
+    between signed and unsigned".

Documentation/SubmittingPatches

@@ -134,9 +134,9 @@ Do not send more than 15 patches at once to the vger mailing lists!!!
 
 
 Linus Torvalds is the final arbiter of all changes accepted into the
-Linux kernel.  His e-mail address is <torvalds@osdl.org>.  He gets
-a lot of e-mail, so typically you should do your best to -avoid- sending
-him e-mail.
+Linux kernel.  His e-mail address is <torvalds@linux-foundation.org>. 
+He gets a lot of e-mail, so typically you should do your best to -avoid-
+sending him e-mail. 
 
 Patches which are bug fixes, are "obvious" changes, or similarly
 require little discussion should be sent or CC'd to Linus.  Patches

Documentation/feature-removal-schedule.txt

@@ -318,3 +318,10 @@ Why:	/proc/acpi/button has been replaced by events to the input layer
 Who:	Len Brown <len.brown@intel.com>
 
 ---------------------------
+
+What:	JFFS (version 1)
+When:	2.6.21
+Why:	Unmaintained for years, superceded by JFFS2 for years.
+Who:	Jeff Garzik <jeff@garzik.org>
+
+---------------------------

Documentation/kdump/kdump.txt

@@ -17,7 +17,7 @@ You can use common Linux commands, such as cp and scp, to copy the
 memory image to a dump file on the local disk, or across the network to
 a remote system.
 
-Kdump and kexec are currently supported on the x86, x86_64, ppc64 and IA64
+Kdump and kexec are currently supported on the x86, x86_64, ppc64 and ia64
 architectures.
 
 When the system kernel boots, it reserves a small section of memory for
@@ -61,7 +61,12 @@ Install kexec-tools
 
 2) Download the kexec-tools user-space package from the following URL:
 
-http://www.kernel.org/pub/linux/kernel/people/horms/kexec-tools/kexec-tools-testing-20061214.tar.gz
+http://www.kernel.org/pub/linux/kernel/people/horms/kexec-tools/kexec-tools-testing.tar.gz
+
+This is a symlink to the latest version, which at the time of writing is
+20061214, the only release of kexec-tools-testing so far. As other versions
+are made released, the older onese will remain available at
+http://www.kernel.org/pub/linux/kernel/people/horms/kexec-tools/
 
 Note: Latest kexec-tools-testing git tree is available at
 
@@ -71,11 +76,11 @@ http://www.kernel.org/git/?p=linux/kernel/git/horms/kexec-tools-testing.git;a=su
 
 3) Unpack the tarball with the tar command, as follows:
 
-   tar xvpzf kexec-tools-testing-20061214.tar.gz
+   tar xvpzf kexec-tools-testing.tar.gz
 
-4) Change to the kexec-tools-1.101 directory, as follows:
+4) Change to the kexec-tools directory, as follows:
 
-   cd kexec-tools-testing-20061214
+   cd kexec-tools-testing-VERSION
 
 5) Configure the package, as follows:
 
@@ -224,7 +229,23 @@ Dump-capture kernel config options (Arch Dependent, ppc64)
 
 Dump-capture kernel config options (Arch Dependent, ia64)
 ----------------------------------------------------------
-(To be filled)
+
+- No specific options are required to create a dump-capture kernel
+  for ia64, other than those specified in the arch idependent section
+  above. This means that it is possible to use the system kernel
+  as a dump-capture kernel if desired.
+
+  The crashkernel region can be automatically placed by the system
+  kernel at run time. This is done by specifying the base address as 0,
+  or omitting it all together.
+
+  crashkernel=256M@0
+  or
+  crashkernel=256M
+
+  If the start address is specified, note that the start address of the
+  kernel will be aligned to 64Mb, so if the start address is not then
+  any space below the alignment point will be wasted.
 
 
 Boot into System Kernel
@@ -243,6 +264,10 @@ Boot into System Kernel
 
    On ppc64, use "crashkernel=128M@32M".
 
+   On ia64, 256M@256M is a generous value that typically works.
+   The region may be automatically placed on ia64, see the
+   dump-capture kernel config option notes above.
+
 Load the Dump-capture Kernel
 ============================
 
@@ -261,7 +286,8 @@ For x86_64:
 For ppc64:
 	- Use vmlinux
 For ia64:
-	(To be filled)
+	- Use vmlinux or vmlinuz.gz
+
 
 If you are using a uncompressed vmlinux image then use following command
 to load dump-capture kernel.
@@ -277,18 +303,19 @@ to load dump-capture kernel.
    --initrd=<initrd-for-dump-capture-kernel> \
    --append="root=<root-dev> <arch-specific-options>"
 
+Please note, that --args-linux does not need to be specified for ia64.
+It is planned to make this a no-op on that architecture, but for now
+it should be omitted
+
 Following are the arch specific command line options to be used while
 loading dump-capture kernel.
 
-For i386 and x86_64:
+For i386, x86_64 and ia64:
 	"init 1 irqpoll maxcpus=1"
 
 For ppc64:
 	"init 1 maxcpus=1 noirqdistrib"
 
-For IA64
-	(To be filled)
-
 
 Notes on loading the dump-capture kernel:
 

Documentation/usb/CREDITS

@@ -21,7 +21,7 @@ difficult to maintain, add yourself with a patch if desired.
   Bill Ryder <bryder@sgi.com>
   Thomas Sailer <sailer@ife.ee.ethz.ch>
   Gregory P. Smith <greg@electricrain.com>
-  Linus Torvalds <torvalds@osdl.org>
+  Linus Torvalds <torvalds@linux-foundation.org>
   Roman Weissgaerber <weissg@vienna.at>
   <Kazuki.Yasumatsu@fujixerox.co.jp>
 

MAINTAINERS

@@ -1254,7 +1254,7 @@ S:	Maintained
 
 ETHERNET BRIDGE
 P:	Stephen Hemminger
-M:	shemminger@osdl.org
+M:	shemminger@linux-foundation.org
 L:	bridge@osdl.org
 W:	http://bridge.sourceforge.net/
 S:	Maintained
@@ -2277,7 +2277,7 @@ S:	Maintained
 
 NETEM NETWORK EMULATOR
 P:	Stephen Hemminger
-M:	shemminger@osdl.org
+M:	shemminger@linux-foundation.org
 L:	netem@osdl.org
 S:	Maintained
 
@@ -3081,7 +3081,7 @@ S:	Maintained
 
 SKGE, SKY2 10/100/1000 GIGABIT ETHERNET DRIVERS
 P:	Stephen Hemminger
-M:	shemminger@osdl.org
+M:	shemminger@linux-foundation.org
 L:	netdev@vger.kernel.org
 S:	Maintained
 

README

@@ -278,8 +278,8 @@ IF SOMETHING GOES WRONG:
    the file MAINTAINERS to see if there is a particular person associated
    with the part of the kernel that you are having trouble with. If there
    isn't anyone listed there, then the second best thing is to mail
-   them to me (torvalds@osdl.org), and possibly to any other relevant
-   mailing-list or to the newsgroup.
+   them to me (torvalds@linux-foundation.org), and possibly to any other
+   relevant mailing-list or to the newsgroup.
 
  - In all bug-reports, *please* tell what kernel you are talking about,
    how to duplicate the problem, and what your setup is (use your common

arch/i386/kernel/cpu/common.c

@@ -710,11 +710,8 @@ __cpuinit int init_gdt(int cpu, struct task_struct *idle)
 	return 1;
 }
 
-/* Common CPU init for both boot and secondary CPUs */
-static void __cpuinit _cpu_init(int cpu, struct task_struct *curr)
+void __cpuinit cpu_set_gdt(int cpu)
 {
-	struct tss_struct * t = &per_cpu(init_tss, cpu);
-	struct thread_struct *thread = &curr->thread;
 	struct Xgt_desc_struct *cpu_gdt_descr = &per_cpu(cpu_gdt_descr, cpu);
 
 	/* Reinit these anyway, even if they've already been done (on
@@ -722,6 +719,13 @@ static void __cpuinit _cpu_init(int cpu, struct task_struct *curr)
 	   the real ones). */
 	load_gdt(cpu_gdt_descr);
 	set_kernel_gs();
+}
+
+/* Common CPU init for both boot and secondary CPUs */
+static void __cpuinit _cpu_init(int cpu, struct task_struct *curr)
+{
+	struct tss_struct * t = &per_cpu(init_tss, cpu);
+	struct thread_struct *thread = &curr->thread;
 
 	if (cpu_test_and_set(cpu, cpu_initialized)) {
 		printk(KERN_WARNING "CPU#%d already initialized!\n", cpu);
@@ -807,6 +811,7 @@ void __cpuinit cpu_init(void)
 			local_irq_enable();
 	}
 
+	cpu_set_gdt(cpu);
 	_cpu_init(cpu, curr);
 }
 

arch/i386/kernel/nmi.c

@@ -310,13 +310,7 @@ static int __init setup_nmi_watchdog(char *str)
 
 	if ((nmi >= NMI_INVALID) || (nmi < NMI_NONE))
 		return 0;
-	/*
-	 * If any other x86 CPU has a local APIC, then
-	 * please test the NMI stuff there and send me the
-	 * missing bits. Right now Intel P6/P4 and AMD K7 only.
-	 */
-	if ((nmi == NMI_LOCAL_APIC) && (nmi_known_cpu() == 0))
-		return 0;  /* no lapic support */
+
 	nmi_watchdog = nmi;
 	return 1;
 }

arch/i386/kernel/paravirt.c

@@ -566,4 +566,11 @@ struct paravirt_ops paravirt_ops = {
 	.irq_enable_sysexit = native_irq_enable_sysexit,
 	.iret = native_iret,
 };
-EXPORT_SYMBOL(paravirt_ops);
+
+/*
+ * NOTE: CONFIG_PARAVIRT is experimental and the paravirt_ops
+ * semantics are subject to change. Hence we only do this
+ * internal-only export of this, until it gets sorted out and
+ * all lowlevel CPU ops used by modules are separately exported.
+ */
+EXPORT_SYMBOL_GPL(paravirt_ops);

arch/i386/kernel/smpboot.c

@@ -595,6 +595,12 @@ static void __cpuinit start_secondary(void *unused)
  */
 void __devinit initialize_secondary(void)
 {
+	/*
+	 * switch to the per CPU GDT we already set up
+	 * in do_boot_cpu()
+	 */
+	cpu_set_gdt(current_thread_info()->cpu);
+
 	/*
 	 * We don't actually need to load the full TSS,
 	 * basically just the stack pointer and the eip.
@@ -972,9 +978,6 @@ static int __cpuinit do_boot_cpu(int apicid, int cpu)
 	/* Stack for startup_32 can be just as for start_secondary onwards */
 	stack_start.esp = (void *) idle->thread.esp;
 
-	start_pda = cpu_pda(cpu);
-	cpu_gdt_descr = per_cpu(cpu_gdt_descr, cpu);
-
 	irq_ctx_init(cpu);
 
 	x86_cpu_to_apicid[cpu] = apicid;

arch/i386/mach-voyager/voyager_smp.c

@@ -772,6 +772,12 @@ initialize_secondary(void)
 	set_current(hard_get_current());
 #endif
 
+	/*
+	 * switch to the per CPU GDT we already set up
+	 * in do_boot_cpu()
+	 */
+	cpu_set_gdt(current_thread_info()->cpu);
+
 	/*
 	 * We don't actually need to load the full TSS,
 	 * basically just the stack pointer and the eip.

arch/mips/Kconfig

@@ -1568,6 +1568,20 @@ config MIPS_MT_FPAFF
 	depends on MIPS_MT
 	default y
 
+config MIPS_MT_SMTC_INSTANT_REPLAY
+	bool "Low-latency Dispatch of Deferred SMTC IPIs"
+	depends on MIPS_MT_SMTC
+	default y
+	help
+	  SMTC pseudo-interrupts between TCs are deferred and queued
+	  if the target TC is interrupt-inhibited (IXMT). In the first
+	  SMTC prototypes, these queued IPIs were serviced on return
+	  to user mode, or on entry into the kernel idle loop. The
+	  INSTANT_REPLAY option dispatches them as part of local_irq_restore()
+	  processing, which adds runtime overhead (hence the option to turn
+	  it off), but ensures that IPIs are handled promptly even under
+	  heavy I/O interrupt load.
+
 config MIPS_VPE_LOADER_TOM
 	bool "Load VPE program into memory hidden from linux"
 	depends on MIPS_VPE_LOADER

arch/mips/kernel/smtc.c

@@ -1017,6 +1017,33 @@ void setup_cross_vpe_interrupts(void)
  * SMTC-specific hacks invoked from elsewhere in the kernel.
  */
 
+void smtc_ipi_replay(void)
+{
+	/*
+	 * To the extent that we've ever turned interrupts off,
+	 * we may have accumulated deferred IPIs.  This is subtle.
+	 * If we use the smtc_ipi_qdepth() macro, we'll get an
+	 * exact number - but we'll also disable interrupts
+	 * and create a window of failure where a new IPI gets
+	 * queued after we test the depth but before we re-enable
+	 * interrupts. So long as IXMT never gets set, however,
+	 * we should be OK:  If we pick up something and dispatch
+	 * it here, that's great. If we see nothing, but concurrent
+	 * with this operation, another TC sends us an IPI, IXMT
+	 * is clear, and we'll handle it as a real pseudo-interrupt
+	 * and not a pseudo-pseudo interrupt.
+	 */
+	if (IPIQ[smp_processor_id()].depth > 0) {
+		struct smtc_ipi *pipi;
+		extern void self_ipi(struct smtc_ipi *);
+
+		while ((pipi = smtc_ipi_dq(&IPIQ[smp_processor_id()]))) {
+			self_ipi(pipi);
+			smtc_cpu_stats[smp_processor_id()].selfipis++;
+		}
+	}
+}
+
 void smtc_idle_loop_hook(void)
 {
 #ifdef SMTC_IDLE_HOOK_DEBUG
@@ -1113,29 +1140,14 @@ void smtc_idle_loop_hook(void)
 	if (pdb_msg != &id_ho_db_msg[0])
 		printk("CPU%d: %s", smp_processor_id(), id_ho_db_msg);
 #endif /* SMTC_IDLE_HOOK_DEBUG */
-	/*
-	 * To the extent that we've ever turned interrupts off,
-	 * we may have accumulated deferred IPIs.  This is subtle.
-	 * If we use the smtc_ipi_qdepth() macro, we'll get an
-	 * exact number - but we'll also disable interrupts
-	 * and create a window of failure where a new IPI gets
-	 * queued after we test the depth but before we re-enable
-	 * interrupts. So long as IXMT never gets set, however,
-	 * we should be OK:  If we pick up something and dispatch
-	 * it here, that's great. If we see nothing, but concurrent
-	 * with this operation, another TC sends us an IPI, IXMT
-	 * is clear, and we'll handle it as a real pseudo-interrupt
-	 * and not a pseudo-pseudo interrupt.
-	 */
-	if (IPIQ[smp_processor_id()].depth > 0) {
-		struct smtc_ipi *pipi;
-		extern void self_ipi(struct smtc_ipi *);
 
-		if ((pipi = smtc_ipi_dq(&IPIQ[smp_processor_id()])) != NULL) {
-			self_ipi(pipi);
-			smtc_cpu_stats[smp_processor_id()].selfipis++;
-		}
-	}
+	/*
+	 * Replay any accumulated deferred IPIs. If "Instant Replay"
+	 * is in use, there should never be any.
+	 */
+#ifndef CONFIG_MIPS_MT_SMTC_INSTANT_REPLAY
+	smtc_ipi_replay();
+#endif /* CONFIG_MIPS_MT_SMTC_INSTANT_REPLAY */
 }
 
 void smtc_soft_dump(void)

arch/mips/vr41xx/common/irq.c

@@ -1,7 +1,7 @@
 /*
  *  Interrupt handing routines for NEC VR4100 series.
  *
- *  Copyright (C) 2005  Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
+ *  Copyright (C) 2005-2007  Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -73,13 +73,19 @@ static void irq_dispatch(unsigned int irq)
 	if (cascade->get_irq != NULL) {
 		unsigned int source_irq = irq;
 		desc = irq_desc + source_irq;
-		desc->chip->ack(source_irq);
+		if (desc->chip->mask_ack)
+			desc->chip->mask_ack(source_irq);
+		else {
+			desc->chip->mask(source_irq);
+			desc->chip->ack(source_irq);
+		}
 		irq = cascade->get_irq(irq);
 		if (irq < 0)
 			atomic_inc(&irq_err_count);
 		else
 			irq_dispatch(irq);
-		desc->chip->end(source_irq);
+		if (!(desc->status & IRQ_DISABLED) && desc->chip->unmask)
+			desc->chip->unmask(source_irq);
 	} else
 		do_IRQ(irq);
 }

arch/ppc/platforms/ev64360.c

@@ -358,13 +358,12 @@ ev64360_setup_mtd(void)
 
 	ptbl_entries = 3;
 
-	if ((ptbl = kmalloc(ptbl_entries * sizeof(struct mtd_partition),
+	if ((ptbl = kzalloc(ptbl_entries * sizeof(struct mtd_partition),
 		GFP_KERNEL)) == NULL) {
 
 		printk(KERN_WARNING "Can't alloc MTD partition table\n");
 		return -ENOMEM;
 	}
-	memset(ptbl, 0, ptbl_entries * sizeof(struct mtd_partition));
 
 	ptbl[0].name = "reserved";
 	ptbl[0].offset = 0;

arch/x86_64/kernel/nmi.c

@@ -302,8 +302,6 @@ int __init setup_nmi_watchdog(char *str)
 	if ((nmi >= NMI_INVALID) || (nmi < NMI_NONE))
 		return 0;
 
-	if ((nmi == NMI_LOCAL_APIC) && (nmi_known_cpu() == 0))
-		return 0;  /* no lapic support */
 	nmi_watchdog = nmi;
 	return 1;
 }

block/elevator.c

@@ -590,6 +590,12 @@ void elv_insert(request_queue_t *q, struct request *rq, int where)
 		 */
 		rq->cmd_flags |= REQ_SOFTBARRIER;
 
+		/*
+		 * Most requeues happen because of a busy condition,
+		 * don't force unplug of the queue for that case.
+		 */
+		unplug_it = 0;
+
 		if (q->ordseq == 0) {
 			list_add(&rq->queuelist, &q->queue_head);
 			break;
@@ -604,11 +610,6 @@ void elv_insert(request_queue_t *q, struct request *rq, int where)
 		}
 
 		list_add_tail(&rq->queuelist, pos);
-		/*
-		 * most requeues happen because of a busy condition, don't
-		 * force unplug of the queue for that case.
-		 */
-		unplug_it = 0;
 		break;
 
 	default: