Граф коммитов

13419 Коммитов

Автор SHA1 Сообщение Дата
Dave Jones 38377be88a Clean up E7520/7320/7525 quirk printk.
The printk level in this printk is bogus, as the previous printk
didn't have a terminating \n resulting in ..

Intel E7520/7320/7525 detected.<6>Disabling irq balancing and affinity

It also never printed a \n at all in the case where we didn't do
the quirk.

Change it to only make noise if it actually does something useful.

Signed-off-by: Dave Jones <davej@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-07 13:53:13 -07:00
Andres Salomon 95069f89e8 GEODE: reboot fixup for geode machines with CS5536 boards
Writing to MSR 0x51400017 forces a hard reset on CS5536-based machines,
this has the reboot fixup do just that if such a board is detected.

Acked-by: Jordan Crouse <jordan.crouse@amd.com>
Signed-off-by: Andres Salomon <dilinger@debian.org>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-06 11:45:11 -07:00
Linus Torvalds dadde13ad8 Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus
* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
  [MIPS] Fix scheduling latency issue on 24K, 34K and 74K cores
  [MIPS] Add macros to encode processor revisions.
  [MIPS] RM7000: Enable ICACHE_REFILLS_WORKAROUND_WAR.
  [MIPS] SMTC: Fix cut'n'paste bug in Kconfig.debug
  [MIPS] Change libgcc-style functions from lib-y to obj-y
  [MIPS] Fix timer/performance interrupt detection
  [MIPS] AP/SP: Avoid triggering the 34K E125 performance issue
  [MIPS] 64-bit TO_PHYS_MASK macro for RM9000 processors
2007-07-06 10:29:33 -07:00
Vivek Goyal 071922c08c i386: es7000 build breakage fix
o Commit 1833d6bc72 broke the build if
  compiled with CONFIG_ES7000=y and CONFIG_X86_GENERICARCH=n

arch/i386/kernel/built-in.o(.init.text+0x4fa9): In function `acpi_parse_madt':
: undefined reference to `acpi_madt_oem_check'
arch/i386/kernel/built-in.o(.init.text+0x7406): In function `smp_read_mpc':
: undefined reference to `mps_oem_check'
arch/i386/kernel/built-in.o(.init.text+0x8990): In function
`connect_bsp_APIC':
: undefined reference to `enable_apic_mode'
make: *** [.tmp_vmlinux1] Error 1

o Fix the build issue. Provided the definitions of missing functions.

o Don't have ES7000 machine. Only compile tested.

Cc: Len Brown <lenb@kernel.org>
Cc: Natalie Protasevich <protasnb@gmail.com>
Cc: Roland Dreier <rolandd@cisco.com>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-06 10:23:43 -07:00
Loic Prylli d25c1ba2fa MTRR: Fix race causing set_mtrr to go into infinite loop
Processors synchronization in set_mtrr requires the .gate field to be set
after .count field is properly initialized.  Without an explicit barrier,
the compiler was reordering those memory stores.  That was sometimes
causing a processor (in ipi_handler) to see the .gate change and decrement
.count before the latter is set by set_mtrr() (which then hangs in a
infinite loop with irqs disabled).

Signed-off-by: Loic Prylli <loic@myri.com>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-06 10:23:43 -07:00
Jason Wessel 1e2e99f0e4 i386: fix regression, endless loop in ptrace singlestep over an int80
The commit 635cf99a80 introduced a
regression.  Executing a ptrace single step after certain int80
accesses will infinitely loop and never advance the PC.

The TIF_SINGLESTEP check should be done on the return from the syscall
and not before it.

I loops on each single step on the pop right after the int80 which writes out
to the console.  At that point you can issue as many single steps as you want
and it will not advance any further.

The test case is below:

/* Test whether singlestep through an int80 syscall works.
 */
#define _GNU_SOURCE
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/ptrace.h>
#include <sys/wait.h>
#include <sys/mman.h>
#include <asm/user.h>
#include <string.h>

static int child, status;
static struct user_regs_struct regs;

static void do_child()
{
	char str[80] = "child: int80 test\n";

	ptrace(PTRACE_TRACEME, 0, 0, 0);
	kill(getpid(), SIGUSR1);
	write(fileno(stdout),str,strlen(str));
	asm ("int $0x80" : : "a" (20)); /* getpid */
}

static void do_parent()
{
	unsigned long eip, expected = 0;
again:
	waitpid(child, &status, 0);
	if (WIFEXITED(status) || WIFSIGNALED(status))
		return;

	if (WIFSTOPPED(status)) {
		ptrace(PTRACE_GETREGS, child, 0, &regs);
		eip = regs.eip;
		if (expected)
			fprintf(stderr, "child stop @ %08lx, expected %08lx %s\n",
					eip, expected,
					eip == expected ? "" : " <== ERROR");

		if (*(unsigned short *)eip == 0x80cd) {
			fprintf(stderr, "int 0x80 at %08x\n", (unsigned int)eip);
			expected = eip + 2;
		} else
			expected = 0;

		ptrace(PTRACE_SINGLESTEP, child, NULL, NULL);
	}
	goto again;
}

int main(int argc, char * const argv[])
{
	child = fork();
	if (child)
		do_parent();
	else
		do_child();
	return 0;
}

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: <stable@kernel.org>
Cc: Chuck Ebbert <76306.1226@compuserve.com>
Acked-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-06 10:23:43 -07:00
Ralf Baechle 4b3e975e4a [MIPS] Fix scheduling latency issue on 24K, 34K and 74K cores
The idle loop goes to sleep using the WAIT instruction if !need_resched().
This has is suffering from from a race condition that if if just after
need_resched has returned 0 an interrupt might set TIF_NEED_RESCHED but
we've just completed the test so go to sleep anyway.  This would be
trivial to fix by just disabling interrupts during that sequence as in:

        local_irq_disable();
        if (!need_resched())
                __asm__("wait");
        local_irq_enable();

but the processor architecture leaves it undefined if a processor calling
WAIT with interrupts disabled will ever restart its pipeline and indeed
some processors have made use of the freedom provided by the architecture
definition.  This has been resolved and the Config7.WII bit indicates that
the use of WAIT is safe on 24K, 24KE and 34K cores.  It also is safe on
74K starting revision 2.1.0 so enable the use of WAIT with interrupts
disabled for 74K based on a c0_prid of at least that.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-07-06 16:17:11 +01:00
Ralf Baechle 9349075a15 [MIPS] SMTC: Fix cut'n'paste bug in Kconfig.debug
This effectivly turned the SMTC_IDLE_HOOK_DEBUG debug option into a no-op.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-07-06 16:17:11 +01:00
Ralf Baechle f7c2778151 [MIPS] Change libgcc-style functions from lib-y to obj-y
Reported by Eugene Surovegin <ebs@ebshome.net>.

If only modules were users of these functions they did not get linked into
the kernel proper, so later module loads would fail as well.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-07-06 16:17:11 +01:00
Chris Dearman c3e838a2cb [MIPS] Fix timer/performance interrupt detection
Signed-off-by: Chris Dearman <chris@mips.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-07-06 16:17:11 +01:00
Ralf Baechle 6fb88ce04f [MIPS] AP/SP: Avoid triggering the 34K E125 performance issue
C0_status doesn't need to be initialized at this point anyway; the register
will be initialized later.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-07-06 16:17:10 +01:00
Linus Torvalds 7e8767dddf Merge master.kernel.org:/home/rmk/linux-2.6-arm
* master.kernel.org:/home/rmk/linux-2.6-arm:
  [ARM] always allow dump_stack() to produce a backtrace
  [ARM] Fix non-page aligned boot time mappings
  [ARM] 4458/1: pxa: Fix CKEN usage and hence fix pxa suspend/resume
  [ARM] 4454/1: Use word accesses in Versatile PCI config reads
2007-07-05 16:10:16 -07:00
Linus Torvalds 0dac723e5c Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc:
  [POWERPC] Update defconfigs
  [POWERPC] Uninline and export virq_to_hw() for the pasemi_mac driver
  [POWERPC] Fix PMI breakage in cbe_cbufreq driver
  [POWERPC] Disable old EMAC driver in arch/powerpc
2007-07-05 15:55:00 -07:00
Russell King 082f47a79b [ARM] always allow dump_stack() to produce a backtrace
Don't make this dependent on CONFIG_DEBUG_KERNEL - if we hit a WARN_ON
we need the stack trace to work out how we got to that point.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-07-05 19:59:51 +01:00
Russell King 7b9c7b4d07 [ARM] Fix non-page aligned boot time mappings
AT91SAM9260 stopped booting with the recent changes to MM
initialisation - it was asking for a non-aligned virtual address
which caused loops to be non-terminal.  Fix this by rounding
virtual addresses down, but remember to include the offset in
the length, and round the length up to the following page.

This means that asking for a mapping of 4K starting at 2K into
a page maps two pages as one would expect.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-07-04 21:16:33 +01:00
Ralf Baechle 8c976e3451 [MIPS] VSMP: Fix initialization ordering bug.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-07-04 15:53:16 +01:00
Linus Torvalds ba609a9d97 Remove some unused variables
When Andi reverted the HPET resource reservation (in commit
0f8dc2f065), he didn't remove the now
unused variables, which just causes gcc to be noisy.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-03 18:27:53 -07:00
Andi Kleen 5dcccd8d7e Revert perfctr reservation to 2.6.21 state
With this change it works again when the nmi watchdog is disabled.

Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Björn Steinbrink <B.Steinbrink@gmx.de>
Cc: Stephane Eranian <eranian@hpl.hp.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-03 18:11:35 -07:00
Andi Kleen 0f8dc2f065 Revert HPET resource reservation
Matthias Lenk reports that the PCI subsystem would move the HPET on
SB400/SB600-based systems, where the HPET is in BAR1 of the SMbus
controller.

The reason? The ACPI layer registered the PCI MMIO range as being busy
too early, before PCI enumeration had happened, causing the PCI layer to
decide that it should relocate the resources somewhere else.

Firmware resources should be marked busy _after_ the PCI enumeration and
probing has happened, not before.

Remove the too-early reservation, we'll fix it up to do it properly
later.  In the meantime, this solves the regression.

Tested-by: Matthias Lenk <matthias.lenk@amd.com>
Cc: Aaron Durbin <adurbin@google.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-03 18:09:46 -07:00
Richard Purdie 1f750a782c [ARM] 4458/1: pxa: Fix CKEN usage and hence fix pxa suspend/resume
The PXA CKEN changes broken syspend/resume on the pxa27x. This patch
corrects the problem and fixes another couple of bad references.

Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-07-02 13:39:37 +01:00
Andrzej Zaborowski 756813cac1 [ARM] 4454/1: Use word accesses in Versatile PCI config reads
ARM Versatile PCI config reads of one byte width have the lowest two
bits of the address cleared and result in reading from a wrong place
in the config space.  This change is to use word size accesses like it is done for halfword reads.

Byte reads are used for retrieving the IRQ number of a PCI device and the problem was not exposed until 2.6.20 because the value read was discarded in drivers/pci/setup-irq.c (recently fixed).

Signed-off-by: Andrzej Zaborowski <andrew@openedhand.com>
Acked-by: Paul Brook <paul@codesourcery.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-07-02 13:39:35 +01:00
Mike Frysinger 4a3207a333 Blackfin arch: update board defconfig files
Signed-off-by: Mike Frysinger <michael.frysinger@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-07-02 13:49:15 +08:00
Kumar Gala 795bb15e07 [POWERPC] Update defconfigs
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2007-07-02 00:04:36 -05:00
Olof Johansson 9f7905812e [POWERPC] Uninline and export virq_to_hw() for the pasemi_mac driver
Uninline virq_to_hw and export it so modules can use it. The alternative
would be to export the irq_map array instead, but it's an infrequently
called function, and keeping the array unexported seems considerably
cleaner.

This is needed so that the pasemi_mac driver can be compiled as a module.

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-07-02 13:29:21 +10:00
Christian Krafft ee5d1b7f2a [POWERPC] Fix PMI breakage in cbe_cbufreq driver
The recent change to cell_defconfig to enable cpufreq on Cell exposed
the fact that the cbe_cpufreq driver currently needs the PMI interface
code to compile, but Kconfig doesn't make sure that the PMI interface
code gets built if cbe_cpufreq is enabled.

In fact cbe_cpufreq can work without PMI, so this ifdefs out the code
that deals with PMI.  This is a minimal solution for 2.6.22; a more
comprehensive solution will be merged for 2.6.23.

Signed-off-by: Christian Krafft <krafft@de.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-07-02 10:35:58 +10:00
Rafael J. Wysocki 2391dae3e3 PM: introduce set_target method in pm_ops
Commit 52ade9b3b9 changed the suspend code
ordering to execute pm_ops->prepare() after the device model per-device
.suspend() calls in order to fix some ACPI-related issues.  Unfortunately, it
broke the at91 platform which assumed that pm_ops->prepare() would be called
before suspending devices.

at91 used pm_ops->prepare() to get notified of the target system sleep state,
so that it could use this information while suspending devices.  However, with
the current suspend code ordering pm_ops->prepare() is called too late for
this purpose.  Thus, at91 needs an additional method in 'struct pm_ops' that
will be used for notifying the platform of the target system sleep state.
Moreover, in the future such a method will also be needed by ACPI.

This patch adds the .set_target() method to 'struct pm_ops' and makes the
suspend code call it, if implemented, before executing the device model
per-device .suspend() calls.  It also modifies the at91 code to use
pm_ops->set_target() instead of pm_ops->prepare().

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: Len Brown <lenb@kernel.org>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-01 12:29:44 -07:00
Andrew Morton 84288ad89e i386: mtrr crash fix
Commit 3ebad59056 ("[PATCH] x86: Save and
restore the fixed-range MTRRs of the BSP when suspending") added mtrr
operations without verifying that the CPU has MTRRs.  Crashes transmeta
CPUs.

Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: <linux@horizon.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-01 12:29:44 -07:00
Linus Torvalds 4710bcce8e i386: remove bogus mtrr range check
Commit 9215da3320 "fixed" the MTRR range
check to not allow any MTRR's under the 1MB mark (since that's where the
fixed MTRR's are active).

However, that was totally bogus, since it's normal (and almost required)
to have a large variable MTRR that starts at 0, and covers some large
percentage of the whole RAM, and then using the fixed MTRR's to override
that large MTRR to handle the special ISA hole in the 640k-1M region.

The old check was bogus too (checking that no variable MTRR is used that
is entirely under the 1MB range), but at least it wasn't actively
detrimental, because no sane situation would ever trigger such MTRR
usage in the first place.

That said, the whole notion of not allowing variable MTRR's in the low
1MB is just stupid, so rather than revert the commit, this just removes
the whole sad and unnecessary check entirely.

Cc: Jan Beulich <jbeulich@novell.com>
Cc: Andi Kleen <ak@suse.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Tested-by: Luca Palermo <darkmage@sabayonlinux.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-01 10:56:11 -07:00
Linus Torvalds abdba71725 Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6
* 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6:
  [SPARC64]: Add linux/pagemap.h to asm/tlb.h
  [SPARC64]: Need to set state to IDLE during sun4v IRQ enable.
  [SPARC64]: Fix VIRQ enabling.
  [SPARC64]: Add irqs to mdesc_node.
2007-06-29 21:30:18 -07:00
Will Schmidt fde937d826 Fix VDSO gettimeofday() when called with NULL struct timeval.
The vdso64 portion of patch 74609f4536 for
fixing problems with NULL gettimeofday input mistakenly checks for a
null tz field twice, when it should be checking for null tz once, and
null tv once; by way of a r10/r11 typo.

Any application calling gettimeofday(&tv,NULL) will "fail".

This corrects that typo, and makes my G5 happy.

Tested on G5.

Signed-off-by: Will Schmidt <will_schmidt@vnet.ibm.com>
Cc: Tony Breeds <tony@bakeyournoodle.com>
Forwarded-by: Ben Herrenschmidt <benh@kernel.crashing.org>

[ Ben says: "I checked the 32 bits part of the change is correct.  You
  can probably blame me for originally writing the 2 versions with
  inversed usage of r10 and r11, thus confusing Tony :-)"

  Ben duly blamed.   - Linus ]

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-06-29 21:27:00 -07:00
David Woodhouse edd5cd4a94 Introduce fixed sys_sync_file_range2() syscall, implement on PowerPC and ARM
Not all the world is an i386.  Many architectures need 64-bit arguments to be
aligned in suitable pairs of registers, and the original
sys_sync_file_range(int, loff_t, loff_t, int) was therefore wasting an
argument register for padding after the first integer.  Since we don't
normally have more than 6 arguments for system calls, that left no room for
the final argument on some architectures.

Fix this by introducing sys_sync_file_range2(int, int, loff_t, loff_t) which
all fits nicely.  In fact, ARM already had that, but called it
sys_arm_sync_file_range.  Move it to fs/sync.c and rename it, then implement
the needed compatibility routine.  And stop the missing syscall check from
bitching about the absence of sys_sync_file_range() if we've implemented
sys_sync_file_range2() instead.

Tested on PPC32 and with 32-bit and 64-bit userspace on PPC64.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-06-28 11:38:30 -07:00
Alexey Dobriyan 5da44ad504 mips-jazz: correct flags for timer io resource
arch/mips/jazz/setup.c:55:4: error: Initializer entry defined twice

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-06-28 11:38:19 -07:00
Randy Dunlap 80581c43d0 mtrr/cyrix: fix sections
main.c::mtrr_add() or mtrr_del() [exported]
calls main.c::mtrr_add_page() or mtrr_del_page() or mtrr_restore() [resume]
calls main.c::set_mtrr()
calls main.c::ipi_handler()
calls main.c::mtrr_if->set_all() == which can be cyrix_set_all

WARNING: arch/i386/kernel/built-in.o(.text+0x8657): Section mismatch: reference to .init.data: (between 'cyrix_set_all' and 'centaur_get_free_region')
WARNING: arch/i386/kernel/built-in.o(.text+0x866b): Section mismatch: reference to .init.data: (between 'cyrix_set_all' and 'centaur_get_free_region')
WARNING: arch/i386/kernel/built-in.o(.text+0x867e): Section mismatch: reference to .init.data: (between 'cyrix_set_all' and 'centaur_get_free_region')
WARNING: arch/i386/kernel/built-in.o(.text+0x8684): Section mismatch: reference to .init.data: (between 'cyrix_set_all' and 'centaur_get_free_region')
WARNING: arch/i386/kernel/built-in.o(.text+0x868a): Section mismatch: reference to .init.data: (between 'cyrix_set_all' and 'centaur_get_free_region')

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-06-28 11:34:53 -07:00
Linus Torvalds b75ae86035 Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6:
  [IA64] Make SN2 PCI code use ioremap rather than manually mangle the address
  [IA64] Force error to surface in nofault code
  [IA64] change sh_change_coherence oemcall to use nolock
  [IA64] remove duplicate header include line
  [IA64] Correct unwind validation code
  [IA64] is_power_of_2-ia64/mm/hugetlbpage.c
2007-06-27 10:04:02 -07:00
Siddha, Suresh B 48d8d7ee5d x86_64 irq: use mask/unmask and proper locking in fixup_irqs()
Force irq migration path during cpu offline, is not using proper locks and
irq_chip mask/unmask routines.  This will result in some races(especially
the device generating the interrupt can see some inconsistent state,
resulting in issues like stuck irq,..).

Appended patch fixes the issue by taking proper lock and encapsulating
irq_chip set_affinity() with a mask() before and an unmask() after.

This fixes a MSI irq stuck issue reported by Darrick Wong.

There are several more general bugs in this area(irq migration in the
process context). For example,

 1. Possibility of missing edge triggered irq.
 2. Reliable method of migrating level triggered irq in the process context.

We plan to look and close these in the near future.

Eric says:
	In addition even with the fix from Suresh there is still at least one
	nasty hardware race in fixup_irqs().   However we exercise that code
	path rarely enough that we are unlikely to hit it in the real world,
	and that race seems to have existed since the code was merged.  And a
	fix for that is not coming soon as it is an open investigation area
	if we can fix irq migration to work outside of irq context or if
	we have to rework the requirements imposed by the generic cpu hotplug
	and layer on fixup_irqs().  So this may come up again.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Reported-and-tested-by: Darrick Wong <djwong@us.ibm.com>
Cc: Andi Kleen <ak@suse.de>
Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-06-26 16:54:29 -07:00
Suresh Siddha c47e285dee x86_64: set the irq_chip name for lapic
set the irq_chip name for lapic.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-06-26 16:54:29 -07:00
Linus Torvalds f436ab4361 Merge master.kernel.org:/home/rmk/linux-2.6-arm
* master.kernel.org:/home/rmk/linux-2.6-arm:
  [ARM] 4449/1: more entries in arch/arm/boot/.gitignore
  [ARM] 4452/1: Force the literal pool dump before reloc_end
  [ARM] Update show_regs/oops register format
  [ARM] Add support for pause_on_oops and display preempt/smp options
2007-06-26 16:51:23 -07:00
Linus Torvalds 6cd236e005 Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus
* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
  [MIPS] Count timer interrupts correctly.
  [MIPS] SMTC and non-SMTC kernel and modules are incompatible
  [MIPS] EMMA2RH: Disable GEN_RTC, it can't possibly work.
  [MIPS] Remove a duplicated local variable in test_and_clear_bit()
  [MIPS] use compat_siginfo in rt_sigframe_n32
  [MIPS] 20K: Handle WAIT related bugs according to errata information
  [MIPS] AP/SP requires shadow registers, auto enable support.
  [MIPS] Fix pb1500 reg B access
  [MIPS] Alchemy: Fix wrong cast
  [MIPS] remove "support for" from system type entry
  [MIPS] add io_map_base to pci_controller on Cobalt
  [MIPS] __ucmpdi2 arguments are unsigned long long.
2007-06-26 16:50:48 -07:00
Jes Sorensen 1ee27a4eed [IA64] Make SN2 PCI code use ioremap rather than manually mangle the address
This one changes the SN2 specific PCI drivers to use ioremap() for
obtaining the real address to access for the PCI registers instead of
manually calculating them with __IA64_UNCACHED_OFFSET.

The patch should have no real change when running on a normal Linux
kernel, but when running as a paravirtualized it is needed.

Signed-off-by: Jes Sorenson <jes@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2007-06-26 13:35:45 -07:00
Russ Anderson c034637967 [IA64] Force error to surface in nofault code
Montecito behaves slightly differently than previous processors,
resulting in the MCA due to a failed PIO read to sometimes surfacing
outside the nofault code.  Adding an additional or and stop bits
ensures the MCA surfaces in the nofault code.

Signed-off-by: Russ Anderson <rja@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2007-06-26 13:34:16 -07:00
MUNEDA Takahiro 2e77ff21d2 [IA64] remove duplicate header include line
Remove duplicate header include line from arch/ia64/kernel/time.c.

Signed-off-by: MUNEDA Takahiro <muneda.takahiro@jp.fujitsu.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2007-06-26 13:33:45 -07:00
Keith Owens 66fa9b107e [IA64] Correct unwind validation code
Both rp_loc and pfs_loc can be in the register stack area _or_ they can
be in the memory stack area, the latter occurs when a struct pt_regs is
pushed.  Correct the validation check on these fields to check for both
stack areas.  Not allowing for memory stack locations means no
backtrace past ia64_leave_kernel, or any other code that uses
PT_REGS_UNWIND_INFO.

Signed-off-by: Keith Owens <kaos@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2007-06-26 13:33:10 -07:00
vignesh babu 9be26f4c4b [IA64] is_power_of_2-ia64/mm/hugetlbpage.c
Replacing (n & (n-1)) in the context of power of 2 checks
with is_power_of_2

Signed-off-by: vignesh babu <vignesh.babu@wipro.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2007-06-26 13:32:59 -07:00
Chris Dearman 8e15a0e35f [MIPS] Count timer interrupts correctly.
Signed-off-by: Chris Dearman <chris@mips.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-06-26 19:57:34 +02:00
Ralf Baechle 3207cd5c4b [MIPS] EMMA2RH: Disable GEN_RTC, it can't possibly work.
Neither rtc_mips_get_time nor rtc_mips_set_time are being initialized by
the EMMA2RH setup code, so genrtc at best was a RTC dummy avoiding a few
error messages but not providing actual functionality.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-06-26 19:57:34 +02:00
Pavel Kiryukhin a76f3a417a [MIPS] use compat_siginfo in rt_sigframe_n32
Signed-off-by: Pavel Kiryukhin <vksavl@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-06-26 19:57:33 +02:00
Ralf Baechle c8eae71dc8 [MIPS] 20K: Handle WAIT related bugs according to errata information
We used to avoid the WAIT entirely on the 20K but really only need to do
this on early revs of the 20K.  Without this a 20K was a bit of a
power hog.  Well, in the lower power power hog category ;-)

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-06-26 19:57:33 +02:00
Ralf Baechle b0c10b9f4c [MIPS] AP/SP requires shadow registers, auto enable support.
Noticed by Chris Dearman (chris@mips.com).

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-06-26 19:57:33 +02:00
Yoichi Yuasa b3a04a6d07 [MIPS] Fix pb1500 reg B access
au_readl() is correct here.

Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-06-26 19:57:33 +02:00
Yoichi Yuasa 08a4593682 [MIPS] Alchemy: Fix wrong cast
Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-06-26 19:57:33 +02:00