No functional change.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Acked-by: N"David S. Miller" <davem@davemloft.net>

No functional change
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Acked-by: NChen Liqin <liqin.chen@sunplusct.com>

No functional change.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>

No functional change.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Acked-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

No functional change.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Acked-by: NDavid Howells <dhowells@redhat.com>

No functional change.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Acked-by: NMichal Simek <monstr@monstr.eu>

No functional change.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Cc: Greg Ungerer <gerg@uclinux.org>

No functional change.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Acked-by: NTony Luck <tony.luck@intel.com>

No functional change.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Acked-by: NDavid Howells <dhowells@redhat.com>

No functional change.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Cc: Mike Frysinger <vapier@gentoo.org>

Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Cc: Richard Henderson <rth@twiddle.net>

All architectures are finally converted. Remove the cruft.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: David Howells <dhowells@redhat.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Greg Ungerer <gerg@uclinux.org>
Cc: Michal Simek <monstr@monstr.eu>
Acked-by: NDavid Howells <dhowells@redhat.com>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Chen Liqin <liqin.chen@sunplusct.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Jeff Dike <jdike@addtoit.com>

Use the generic irq Kconfig. Select GENERIC_HARDIRQS_NO_DEPRECATED as
we have converted all irq_chip functions.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Cc: Paul Mundt <lethal@linux-sh.org>

Convert the irq chips to the new functions and use proper flow
handlers. handle_level_irq is appropriate.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Cc: Paul Mundt <lethal@linux-sh.org>

Convert the irq chips to the new functions and use proper flow
handlers. handle_level_irq is appropriate.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Cc: Paul Mundt <lethal@linux-sh.org>

Convert the irq chips to the new functions and use proper flow
handlers. handle_level_irq is appropriate.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Cc: Paul Mundt <lethal@linux-sh.org>

Convert the irq chips to the new functions and use proper flow
handlers. handle_level_irq is appropriate.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Cc: Paul Mundt <lethal@linux-sh.org>

Convert the irq chips to the new functions and use proper flow
handlers. handle_level_irq is appropriate.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Cc: Paul Mundt <lethal@linux-sh.org>

Convert the irq chips to the new functions and use proper flow
handlers. handle_level_irq is appropriate.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Cc: Paul Mundt <lethal@linux-sh.org>

Convert the irq chips to the new functions and use proper flow
handlers. handle_level_irq is appropriate.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Cc: Paul Mundt <lethal@linux-sh.org>

Convert the irq chips to the new functions and use proper flow
handlers. handle_level_irq is appropriate.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Cc: Paul Mundt <lethal@linux-sh.org>

Convert the irq chips to the new functions and use proper flow
handlers. handle_level_irq is appropriate.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Cc: Paul Mundt <lethal@linux-sh.org>

Convert the irq chip to the new functions and use proper flow
handlers. handle_level_irq is appropriate.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Cc: Paul Mundt <lethal@linux-sh.org>

Convert the irq chips to the new functions and use proper flow
handlers. handle_level_irq is appropriate.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Cc: Paul Mundt <lethal@linux-sh.org>

Convert the irq chips to the new functions and use proper flow
handlers. handle_level_irq is appropriate.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Cc: Paul Mundt <lethal@linux-sh.org>

Convert the irq chips to the new functions and use proper flow
handlers. handle_level_irq is appropriate.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Cc: Paul Mundt <lethal@linux-sh.org>

Convert the irq chips to the new functions and use proper flow
handlers. handle_level_irq is appropriate.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Cc: Paul Mundt <lethal@linux-sh.org>

The irq descriptors are already initialized by the generic
code. Remove the redundant init code and set the irq chip with the
proper accessor function.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Cc: Paul Mundt <lethal@linux-sh.org>

Use the generic irq Kconfig. Select GENERIC_HARDIRQS_NO_DEPRECATED as
we have converted all irq_chip functions. Fix the fallout in
show_interrupts().
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Cc: Mikael Starvik <starvik@axis.com>

Convert the irq chip functions and install handle_simple_irq for each
interrupt to get rid of __do_IRQ()
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Cc: Mikael Starvik <starvik@axis.com>

Convert the irq_chip functions and install handle_simple_irq for each
interrupt. This converts V10 to the flow handling and lets us remove
__do_IRQ().
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Cc: Mikael Starvik <starvik@axis.com>

Use the wrapper around __do_IRQ() so we can convert V10 and V32
seperately.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Cc: Mikael Starvik <starvik@axis.com>

Switch to the generic irq Kconfig. h8300 has all irq chips converted
to the new functions, so select the GENERIC_HARDIRQS_NO_DEPRECATED
switch as well. Fixup the resulting fallout in show_interrupts().
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: Paul Mundt <lethal@linux-sh.org>

__do_IRQ is deprecated so h8300 needs to be converted to proper flow
handling. The irq chip is simple and does not required any
mask/ack/eoi functions, so we can use handle_simple_irq.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: Paul Mundt <lethal@linux-sh.org>

No functional change, just straight forward conversion.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: Paul Mundt <lethal@linux-sh.org>

Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  smp: Allow on_each_cpu() to be called while early_boot_irqs_disabled status to init/main.c
  lockdep: Move early boot local IRQ enable/disable status to init/main.c

It turns out that some device drivers map pages from the ACPI NVS region
during resume using ioremap(), which conflicts with ioremap_cache() used
for mapping those pages by the NVS save/restore code in nvs.c.

Make the NVS pages mapped by the code in nvs.c be unmapped before device
drivers' resume routines run.
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Commit ca9b600b ("ACPI / PM: Make suspend_nvs_save() use
acpi_os_map_memory()") attempted to prevent the code in osl.c and nvs.c
from using different ioremap() variants by making the latter use
acpi_os_map_memory() for mapping the NVS pages.  However, that also
requires acpi_os_unmap_memory() to be used for unmapping them, which
causes synchronize_rcu() to be executed many times in a row
unnecessarily and introduces substantial delays during resume on some
systems.

Instead of using acpi_os_map_memory() for mapping the NVS pages in nvs.c
introduce acpi_os_ioremap() calling ioremap_cache() and make the code in
both osl.c and nvs.c use it.
Reported-by: NJeff Chua <jeff.chua.linux@gmail.com>
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

* akpm:
  kernel/smp.c: consolidate writes in smp_call_function_interrupt()
  kernel/smp.c: fix smp_call_function_many() SMP race
  memcg: correctly order reading PCG_USED and pc->mem_cgroup
  backlight: fix 88pm860x_bl macro collision
  drivers/leds/ledtrig-gpio.c: make output match input, tighten input checking
  MAINTAINERS: update Atmel AT91 entry
  mm: fix truncate_setsize() comment
  memcg: fix rmdir, force_empty with THP
  memcg: fix LRU accounting with THP
  memcg: fix USED bit handling at uncharge in THP
  memcg: modify accounting function for supporting THP better
  fs/direct-io.c: don't try to allocate more than BIO_MAX_PAGES in a bio
  mm: compaction: prevent division-by-zero during user-requested compaction
  mm/vmscan.c: remove duplicate include of compaction.h
  memblock: fix memblock_is_region_memory()
  thp: keep highpte mapped until it is no longer needed
  kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT

We have to test the cpu mask in the interrupt handler before checking the
refs, otherwise we can start to follow an entry before its deleted and
find it partially initailzed for the next trip.  Presently we also clear
the cpumask bit before executing the called function, which implies
getting write access to the line.  After the function is called we then
decrement refs, and if they go to zero we then unlock the structure.

However, this implies getting write access to the call function data
before and after another the function is called.  If we can assert that no
smp_call_function execution function is allowed to enable interrupts, then
we can move both writes to after the function is called, hopfully allowing
both writes with one cache line bounce.

On a 256 thread system with a kernel compiled for 1024 threads, the time
to execute testcase in the "smp_call_function_many race" changelog was
reduced by about 30-40ms out of about 545 ms.

I decided to keep this as WARN because its now a buggy function, even
though the stack trace is of no value -- a simple printk would give us the
information needed.

Raw data:

Without patch:
  ipi_test startup took 1219366ns complete 539819014ns total 541038380ns
  ipi_test startup took 1695754ns complete 543439872ns total 545135626ns
  ipi_test startup took 7513568ns complete 539606362ns total 547119930ns
  ipi_test startup took 13304064ns complete 533898562ns total 547202626ns
  ipi_test startup took 8668192ns complete 544264074ns total 552932266ns
  ipi_test startup took 4977626ns complete 548862684ns total 553840310ns
  ipi_test startup took 2144486ns complete 541292318ns total 543436804ns
  ipi_test startup took 21245824ns complete 530280180ns total 551526004ns

With patch:
  ipi_test startup took 5961748ns complete 500859628ns total 506821376ns
  ipi_test startup took 8975996ns complete 495098924ns total 504074920ns
  ipi_test startup took 19797750ns complete 492204740ns total 512002490ns
  ipi_test startup took 14824796ns complete 487495878ns total 502320674ns
  ipi_test startup took 11514882ns complete 494439372ns total 505954254ns
  ipi_test startup took 8288084ns complete 502570774ns total 510858858ns
  ipi_test startup took 6789954ns complete 493388112ns total 500178066ns

	#include <linux/module.h>
	#include <linux/init.h>
	#include <linux/sched.h> /* sched clock */

	#define ITERATIONS 100

	static void do_nothing_ipi(void *dummy)
	{
	}

	static void do_ipis(struct work_struct *dummy)
	{
		int i;

		for (i = 0; i < ITERATIONS; i++)
			smp_call_function(do_nothing_ipi, NULL, 1);

		printk(KERN_DEBUG "cpu %d finished\n", smp_processor_id());
	}

	static struct work_struct work[NR_CPUS];

	static int __init testcase_init(void)
	{
		int cpu;
		u64 start, started, done;

		start = local_clock();
		for_each_online_cpu(cpu) {
			INIT_WORK(&work[cpu], do_ipis);
			schedule_work_on(cpu, &work[cpu]);
		}
		started = local_clock();
		for_each_online_cpu(cpu)
			flush_work(&work[cpu]);
		done = local_clock();
		pr_info("ipi_test startup took %lldns complete %lldns total %lldns\n",
			started-start, done-started, done-start);

		return 0;
	}

	static void __exit testcase_exit(void)
	{
	}

	module_init(testcase_init)
	module_exit(testcase_exit)
	MODULE_LICENSE("GPL");
	MODULE_AUTHOR("Anton Blanchard");
Signed-off-by: NMilton Miller <miltonm@bga.com>
Cc: Anton Blanchard <anton@samba.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>