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21458 commits

Author SHA1 Message Date
Bill Gatliff
6dccd74b38 [ARM] 4939/1: [CSB637] Update defconfig to use gpio-led
Updates the CSB637 platform's D1/PB2 LED to use gpio-led by default.

Signed-off-by:  Bill Gatliff <bgat@billgatliff.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-04-10 14:59:59 +01:00
Bill Gatliff
ca15447902 [ARM] 4938/1: [CSB637] Convert heartbeat LED to gpio-leds
Converts the D1/PB2 LED to use the gpio-leds API and heartbeat trigger.

Signed-off-by: Bill Gatliff <bgat@billgatliff.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-04-10 14:59:58 +01:00
Bill Gatliff
952c855fc7 [ARM] 4937/1: [CSB637] Convert to new-style UART initialization
Converts the CSB637 to the new-style UART initialization API.

Signed-off-by: Bill Gatliff <bgat@billgatliff.com>
Acked-by: Andrew Victor <linux@maxim.org.za>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-04-10 14:59:57 +01:00
Bill Gatliff
c8fc191656 [ARM] 4936/1: [CSB337] Converts to new-style UART initialization
Converts the CSB337 target to the new UART initialization API.

Signed-off-by:  Bill Gatliff <bgat@billgatliff.com>
Acked-by: Andrew Victor <linux@maxim.org.za>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-04-10 14:59:56 +01:00
Andrew Victor
1af89cb653 [ARM] 4915/1: AT91: Update defconfigs (Part 2)
Update the default configuration for the following AT91-based boards:
   Embest ATEB9200
   Cogent CSB337
   Cogent CSB637
   Sperry-Sun KAFA
   Picotux200

Signed-off-by: Andrew Victor <linux@maxim.org.za>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-04-10 14:57:23 +01:00
Andrew Victor
adfbe06a3d [ARM] 4914/1: AT91: Update defconfigs (Part 1)
Update the default configuration for the following AT91-based boards:
   Atmel AT91RM9200 DK
   Atmel AT91RM9200 EK
   Atmel AT91SAM9260 EK
   Atmel AT91SAM9261 EK
   Atmel AT91SAM9263 EK
   Atmel AT91SAM9RL EK

Signed-off-by: Andrew Victor <linux@maxim.org.za>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-04-10 14:57:21 +01:00
David S. Miller
d786a4a659 [SPARC]: Fix several regset and ptrace bugs.
1) ptrace should pass 'current' to task_user_regset_view()

2) When fetching general registers using a 64-bit view, and
   the target is 32-bit, we have to convert.

3) Skip the whole register window get/set code block if
   the user isn't asking to access anything in there.

   Otherwise we have problems if the user doesn't have
   an address space setup.  Fetching ptrace register is
   still valid at such a time, and ptrace does not try
   to access the register window area of the regset.

Signed-off-by: David S. Miller <davem@davemloft.net>
2008-04-09 19:39:25 -07:00
Steven Rostedt
f4be31ec96 pop previous section in alternative.c
gcc expects all toplevel assembly to return to the original section type.
The code in alteranative.c does not do this. This caused some strange bugs
in sched-devel where code would end up in the .rodata section and when
the kernel sets the NX bit on all .rodata, the kernel would crash when
executing this code.

This patch adds a .previous marker to return the code back to the
original section.

Credit goes to Andrew Pinski for telling me it wasn't a gcc bug but a
bug in the toplevel asm code in the kernel.  ;-)

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-09 18:38:08 -07:00
Christoph Lameter
273988fa4d [IA64] Untangle sync_icache_dcache() page size determination
Untangle the chaos of page size determination in this function by
simply using PAGE_SIZE << compound_order().

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-04-09 13:05:41 -07:00
S.Caglar Onur
5cf1f7cef1 [IA64] arch/ia64/kernel/: use time_* macros
The functions time_before, time_before_eq, time_after, and time_after_eq are
more robust for comparing jiffies against other values.

So use the time_after() & time_before() macros, defined at linux/jiffies.h,
which deal with wrapping correctly

[akpm@linux-foundation.org: coding-style fixes]

Signed-off-by: S.Caglar Onur <caglar@pardus.org.tr>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-04-09 10:38:30 -07:00
Johannes Weiner
734bc367b4 [IA64] remove redundant display of free swap space in show_mem()
show_mem() has no need to print the amount of free swap space manually because
show_free_areas() does this already and is called by the former.

The two outputs only differ in text formatting:

  printk("Free swap  = %lukB\n", ...);
  printk("Free swap:       %6ldkB\n", ...);

Signed-off-by: Johannes Weiner <hannes@saeurebad.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-04-09 10:37:51 -07:00
FUJITA Tomonori
b34eb53cdc [IA64] make IOMMU respect the segment boundary limits
IA64's IOMMU implementation allocates memory areas spanning LLD's segment
boundary limit.  It forces low level drivers to have a workaround to adjust
scatter lists that the IOMMU builds.

We are in the process of making all the IOMMUs respect the segment boundary
limits to remove such work around in LLDs.  This patch is for IA64's IOMMU.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-04-09 10:37:21 -07:00
Masami Hiramatsu
34e1ceb188 [IA64] kprobes: kprobe-booster for ia64
Add kprobe-booster support on ia64.

Kprobe-booster improves the performance of kprobes by eliminating single-step,
where possible.  Currently, kprobe-booster is implemented on x86 and x86-64.
This is an ia64 port.

On ia64, kprobe-booster executes a copied bundle directly, instead of single
stepping.  Bundles which have B or X unit and which may cause an exception
(including break) are not executed directly.  And also, to prevent hitting
break exceptions on the copied bundle, only the hindmost kprobe is executed
directly if several kprobes share a bundle and are placed in different slots.
Note: set_brl_inst() is used for preparing an instruction buffer(it does not
modify any active code), so it does not need any atomic operation.

Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: bibo,mao <bibo.mao@intel.com>
Cc: Rusty Lynch <rusty.lynch@intel.com>
Cc: Prasanna S Panchamukhi <prasanna@in.ibm.com>
Cc: Jim Keniston <jkenisto@us.ibm.com>
Cc: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-04-09 10:36:43 -07:00
Pavel Emelyanov
96ded9dadd [IA64] fix getpid and set_tid_address fast system calls for pid namespaces
The sys_getpid() and sys_set_tid_address() behavior changed from

	return current->tgid

to

	struct pid *pid;
	pid = current->pids[PIDTYPE_PID].pid;
	return pid->numbers[pid->level].nr;

But the fast system calls on ia64 still operate the old way.  Patch them
appropriately to let ia64 work with pid namespaces.  Besides, this is one more
step in deprecating of pid and tgid on task_struct.

The fsys_getppid() is to be patched as well, but its logic is much
more complex now, so I will make it later.

One thing I'm not 100% sure is the trick with the IA64_UPID_SHIFT.  On order
to access the pid->level's element of an array I have to perform the following
calculations

	pid + sizeof(struct upid) * pid->level

The problem is that ia64 can only multiply float point registers, while all
the offsets I have in code are in rXX ones.  Fortunately, the sizeof(struct
upid) is 32 bytes on ia64 (and is very unlikely to ever change), so the
calculations get simpler:

	pid + pid->level << 5

So, I introduce the IA64_UPID_SHIFT and use the shl instruction.  I also
looked at how gcc compiles the similar place and found that it makes it with
shift as well.  Is this OK to do so?

Tested with ski emulator with 2.6.24 kernel, but fits 2.6.25-rc4 and
2.6.25-rc4-mm1 as well.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Cc: David Mosberger-Tang <davidm@hpl.hp.com>
Cc: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Amy Griffis <amy.griffis@hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-04-09 10:33:36 -07:00
Robert P. J. Day
d167cb8515 [IA64] Replace explicit jiffies tests with time_* macros.
In arch/ia64/sn/kernel/xpc_{main,partition}.c

Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-04-09 10:28:10 -07:00
Li Zefan
6794c75266 [IA64] use goto to jump out do/while_each_thread
do_each_thread/while_each_thread is a double loop, so
should use 'goto' rather than 'break' to break out
the loop.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-04-09 10:17:03 -07:00
Alan D. Brunelle
e914501611 [IA64] Fix unlock ordering in smp_callin
One should normally unlock in the reverse order of the lock calls,
and in this case there certainly is no reason not to.

Signed-off-by: Alan D. Brunelle <alan.brunelle@hp.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-04-09 10:13:13 -07:00
Hidetoshi Seto
3975afffd3 [IA64] kdump: crash.c coding style fix
Fix indenting of switch statement to follow Documentation/CodingStyle.

Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-04-09 09:53:27 -07:00
Hidetoshi Seto
b0247a55f4 [IA64] kdump: add kdump_on_fatal_mca
While it is convenient that we can invoke kdump by asserting INIT
via button on chassis etc., there are some situations that invoking
kdump on fatal MCA is not welcomed rather than rebooting fast without
dump.

This patch adds a new flag 'kdump_on_fatal_mca' that is independent
from 'kdump_on_init' currently available.  Adding this flag enable
us to turning on/off of kdump depend on the event, INIT and/or fatal
MCA.  Default for this flag is to take the dump.

Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-04-09 09:53:00 -07:00
holt@sgi.com
2c6e6db41f [IA64] Minimize per_cpu reservations.
This attached patch significantly shrinks boot memory allocation on ia64.
It does this by not allocating per_cpu areas for cpus that can never
exist.

In the case where acpi does not have any numa node description of the
cpus, I defaulted to assigning the first 32 round-robin on the known
nodes..  For the !CONFIG_ACPI  I used for_each_possible_cpu().

Signed-off-by: Robin Holt <holt@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-04-08 13:51:35 -07:00
holt@sgi.com
41bd26d67c [IA64] Correct pernodesize calculation.
A simple fix.  The existing pernodesize reservation is not taking into
account a second array of pg_data_t structures.  This is normally not
important because the PAGE_ALIGN macro reserves adequate space.

I made the compute_pernodesize steps in the same order as the fill_pernode
steps to make the correlation more clear.

Signed-off-by: Robin Holt <holt@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-04-08 13:50:58 -07:00
Ralf Baechle
9c5a3d729c [MIPS] Handle aliases in vmalloc correctly.
flush_cache_vmap / flush_cache_vunmap were calling flush_cache_all which -
having been deprecated - turned into a nop ...

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-04-07 22:31:04 +01:00
Karsten Wiese
4f41c94d5c x86: fix call to set_cyc2ns_scale() from time_cpufreq_notifier()
In time_cpufreq_notifier() the cpu id to act upon is held in freq->cpu. Use it
instead of smp_processor_id() in the call to set_cyc2ns_scale().
This makes the preempt_*able() unnecessary and lets set_cyc2ns_scale() update
the intended cpu's cyc2ns.

Related mail/thread: http://lkml.org/lkml/2007/12/7/130

Signed-off-by: Karsten Wiese <fzu@wemgehoertderstaat.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-07 21:09:14 +02:00
Ingo Molnar
5b13d86357 revert "x86: tsc prevent time going backwards"
revert:

| commit 47001d6033
| Author: Thomas Gleixner <tglx@linutronix.de>
| Date:   Tue Apr 1 19:45:18 2008 +0200
|
|     x86: tsc prevent time going backwards

it has been identified to cause suspend regression - and the
commit fixes a longstanding bug that existed before 2.6.25 was
opened - so it can wait some more until the effects are better
understood.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-07 21:09:14 +02:00
FUJITA Tomonori
1a7a2e1a77 [SCSI] simscsi: use sg buffer copy helper funcitons
This replaces simscsi_fillresult with scsi_sg_copy_from_buffer.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Tony Luck <tony.luck@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-04-07 12:15:45 -05:00
Linus Torvalds
e1c287b992 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
  [SPARC64]: Fix user accesses in regset code.
  [SPARC64]: Fix FPU saving in 64-bit signal handling.
2008-04-07 08:36:37 -07:00
Valentine Barshak
7132799b0e [POWERPC] kexec: MPIC ack interrupts at mpic_teardown_this_cpu()
We really need to ack interrupts at mpic_teardown, since
not all platforms reset mpic at kernel start-up. For example,
kexec'ed kernel hangs on P.A. Semi if mpic_eoi() isn't called.

Signed-off-by: Valentine Barshak <vbarshak@ru.mvista.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
2008-04-07 09:16:29 -05:00
Olof Johansson
f724bf7781 [POWERPC] pasemi: Minor iommu cleanup
Clean up the pwrficient iommu code a bit. It was using u32 *-based offsets
for registers, which can be a bit confusing when comparing to the manual.

Generated binaries from the code is unchanged from before.

Signed-off-by: Olof Johansson <olof@lixom.net>
2008-04-07 09:16:28 -05:00
Stephen Rothwell
a8f75ea70c [POWERPC] Remove CONFIG_PCI_LEGACY from some configs
This will remove some build warnings and doesn't stop us building any
drivers that we were building previously with these configs.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-04-07 13:49:26 +10:00
Stephen Rothwell
ae86f0088d [POWERPC] htab_remove_mapping is only used by MEMORY_HOTPLUG
This eliminates a warning in builds that don't define
CONFIG_MEMORY_HOTPLUG.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-04-07 13:49:25 +10:00
Nathan Lynch
c6d4d5a8a8 [POWERPC] Convert pci and eeh code to of_device_is_available
A couple of places are duplicating the function of
of_device_is_available; convert them to use it.

Signed-off-by: Nathan Lynch <ntl@pobox.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-04-07 13:49:25 +10:00
Timur Tabi
6ccf61f94f [POWERPC] Enable CONFIG_FORCE_MAX_ZONEORDER for all PowerPC, and make selectable
This enables the FORCE_MAX_ZONEORDER Kconfig option for all PowerPC
systems.  Previously, it was enabled only for 64-bit systems.  We also
make the option selectable from the menu, so that the user can specify
different values.  This is useful for 32-bit systems that need to
allocate more than 4MB of physically contiguous memory.

Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-04-07 13:49:22 +10:00
Robert P. J. Day
c5d5d94aa5 [POWERPC] Use __SPIN_LOCK_UNLOCKED macro in mpc52xx_set_psc_clkdiv
__SPIN_LOCK_UNLOCKED is newer and is not deprecated.

Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-04-07 13:49:21 +10:00
Steven Rostedt
0119536cd3 [POWERPC] Add hand-coded assembly strcmp
We have an assembly version of strncmp for the bootwrapper, but not
for the kernel, so we end up using the C version in the kernel.  This
takes the strncmp code from the bootup and copies it to the kernel
proper, adding two instructions so it copes correctly with len==0.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-04-07 10:03:03 +10:00
Roel Kluin
4df4441e41 [POWERPC] Replace logical-AND by bit-AND in pci_process_ISA_OF_ranges()
Replace logical "&&" by bit "&" for ISA_SPACE_MASK.

Signed-off-by: Roel Kluin <12o3l@tiscali.nl>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-04-07 10:03:02 +10:00
Rusty Russell
64ba4f230d Fix booting pentium+ with dodgy TSC
We handle a broken tsc these days, so no need to panic.  We clear the
TSC bit when tsc_init decides it's unreliable (eg.  under lguest w/ bad
host TSC), leading to bogus panic.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-06 16:10:40 -07:00
Stelian Pop
8d855317fc atmel_usba_udc: move endpoint declarations into platform data.
The atmel_usba_udc driver is being used by several platforms and arches
(avr32 and at91 ATM), and each platform may have different endpoint
settings.

The patch below moves the endpoint declarations into the platform
data and make the necessary adjustments for AVR32 (improved by
Haavard Skinnemoen <hskinnemoen@atmel.com>).

Signed-off-by: Stelian Pop <stelian@popies.net>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
2008-04-06 17:15:08 -04:00
Josh Boyer
a07e387ae3 [POWERPC] 4xx: Add Canyonlands and Yosemite to multi-board defconfig
Include the newly added Canyonlands and Yosemite ports in the mutli-board
440 defconfig.

Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
2008-04-05 18:02:31 -05:00
Valentine Barshak
d0c8df6e45 [POWERPC] 4xx: Use machine_device_initcall() for warp_nand
With a multiplatform kernel, once built we always have warp_setup_nand_flash()
called and NDFC probed, no matter what machine we actually run on. This
potentially can cause problems (such as kernel crash), since NDFC is probed at
a warp-predefined address.

Using machine_device_initcall() NAND devices are registered if we run on a warp only.

Signed-off-by: Valentine Barshak <vbarshak@ru.mvista.com>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
2008-04-05 09:34:13 -05:00
Stefan Roese
9d7030be33 [POWERPC] 4xx: Change dts files to support jumbo frames
This patch changes the "max-frame-size" property to 9000 for all gbit
enabled 4xx boards. All those ports generally support jumbo frames, so
let's give the user a chance to enable it.

Signed-off-by: Stefan Roese <sr@denx.de>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
2008-04-05 09:32:37 -05:00
Stefan Roese
a6190a84ab [POWERPC] 4xx: Some EMAC related changes in Canyonlands & Glacier dts files
This patch fixes some problems in the Canyonlands 460EX and Glacier 460GT
dts files:

- Add "mdio-device = <&EMAC0>" to all all EMAC's except for EMAC0 itself
  (the 460EX/GT only can access the PHY via the EMAC0 instance)
- Add TAH support to Canyonlands dts

Signed-off-by: Stefan Roese <sr@denx.de>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
2008-04-05 09:32:32 -05:00
Linus Torvalds
6fdf5e67fe Merge branch 'upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/ralf/upstream-linus
* 'upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/ralf/upstream-linus:
  [MIPS] Make KGDB compile on UP
  [MIPS] Pb1200: Fix header breakage
2008-04-04 15:09:44 -07:00
Sergei Shtylyov
e64a3cfcd9 [MIPS] Make KGDB compile on UP
Building UP kernel with KGDB enabled produces the following errors and warning
(fatal due to -Werror in arch/mips/kernel/Makefile):

In file included from arch/mips/kernel/gdb-stub.c:142:
include/asm/smp.h:25:1: "raw_smp_processor_id" redefined
In file included from include/linux/sched.h:69,
                 from arch/mips/kernel/gdb-stub.c:126:
include/linux/smp.h:88:1: this is the location of the previous definition
In file included from arch/mips/kernel/gdb-stub.c:142:
include/asm/smp.h:62: error: redefinition of 'smp_send_reschedule'
include/linux/smp.h:102: error: previous definition of 'smp_send_reschedule' was here
include/asm/smp.h: In function `smp_send_reschedule':
include/asm/smp.h:65: error: dereferencing pointer to incomplete type
arch/mips/kernel/gdb-stub.c: At top level:
arch/mips/kernel/gdb-stub.c:660: warning: 'kgdb_wait' defined but not used

Fix the errors by not directly including <asm/smp.h> (which is already included
by <linux/smp.h>) and the warning by enclosing kgdb_wait() in #ifdef CONFIG_SMP.

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-04-04 22:43:47 +01:00
Linus Torvalds
3a143125dd Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86:
  x86: revert assign IRQs to hpet timer
  x86: tsc prevent time going backwards
  xen: Clear PG_pinned in release_{pt,pd}()
  xen: Do not pin/unpin PMD pages
  xen: refactor xen_{alloc,release}_{pt,pd}()
  x86, agpgart: scary messages are fortunately obsolete
  xen: fix grant table bug
  x86: fix breakage of vSMP irq operations
  x86: print message if nmi_watchdog=2 cannot be enabled
  x86: fix nmi_watchdog=2 on Pentium-D CPUs
2008-04-04 14:42:58 -07:00
Geert Uytterhoeven
a1aa758d00 m68k: update defconfigs for 2.6.25
Long overdue update of the m68k defconfigs

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-04 14:42:30 -07:00
Adrian Bunk
ef85ecbf11 m68k: use KBUILD_DEFCONFIG
The default defconfig should be one from arch/m68k/configs/

arch/m68k/defconfig was not exactly identical to amiga_defconfig but
also considering how long they have been without any update that doesn't
seem to have been on purpose.

Signed-off-by: Adrian Bunk <adrian.bunk@movial.fi>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-04 14:42:20 -07:00
Fenghua Yu
a6c75b86ce [IA64] Kernel parameter for max number of concurrent global TLB purges
The patch defines kernel parameter "nptcg=". The parameter overrides max number
of concurrent global TLB purges which is reported from either PAL_VM_SUMMARY or
SAL PALO.

Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-04-04 11:06:38 -07:00
Fenghua Yu
2046b94e7c [IA64] Multiple outstanding ptc.g instruction support
According to SDM2.2, Itanium supports multiple outstanding ptc.g instructions.
But current kernel function ia64_global_tlb_purge() uses a spinlock to serialize
ptc.g instructions issued by multiple processors. This serialization might have
scalability issue on a big SMP machine where many processors could purge TLB
in parallel.

The patch fixes this problem by issuing multiple ptc.g instructions in
ia64_global_tlb_purge(). It also adds support for the "PALO" table to get
a platform view of the max number of outstanding ptc.g instructions (which
may be different from the processor view found from PAL_VM_SUMMARY).

PALO specification can be found at: http://www.dig64.org/home/DIG64_PALO_R1_0.pdf

spinaphore implementation by Matthew Wilcox.

Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-04-04 11:05:59 -07:00
Thomas Gleixner
5761d64b27 x86: revert assign IRQs to hpet timer
The commits:

commit 37a47db8d7
Author: Balaji Rao <balajirrao@gmail.com>
Date:   Wed Jan 30 13:30:03 2008 +0100

    x86: assign IRQs to HPET timers, fix

and

commit e3f37a54f6
Author: Balaji Rao <balajirrao@gmail.com>
Date:   Wed Jan 30 13:30:03 2008 +0100

    x86: assign IRQs to HPET timers

have been identified to cause a regression on some platforms due to
the assignement of legacy IRQs which makes the legacy devices
connected to those IRQs disfunctional.

Revert them.

This fixes http://bugzilla.kernel.org/show_bug.cgi?id=10382

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-04 18:36:49 +02:00
Thomas Gleixner
47001d6033 x86: tsc prevent time going backwards
We already catch most of the TSC problems by sanity checks, but there
is a subtle bug which has been in the code for ever. This can cause
time jumps in the range of hours.

This was reported in:
     http://lkml.org/lkml/2007/8/23/96
and
     http://lkml.org/lkml/2008/3/31/23

I was able to reproduce the problem with a gettimeofday loop test on a
dual core and a quad core machine which both have sychronized
TSCs. The TSCs seems not to be perfectly in sync though, but the
kernel is not able to detect the slight delta in the sync check. Still
there exists an extremly small window where this delta can be observed
with a real big time jump. So far I was only able to reproduce this
with the vsyscall gettimeofday implementation, but in theory this
might be observable with the syscall based version as well.

CPU 0 updates the clock source variables under xtime/vyscall lock and
CPU1, where the TSC is slighty behind CPU0, is reading the time right
after the seqlock was unlocked.

The clocksource reference data was updated with the TSC from CPU0 and
the value which is read from TSC on CPU1 is less than the reference
data. This results in a huge delta value due to the unsigned
subtraction of the TSC value and the reference value. This algorithm
can not be changed due to the support of wrapping clock sources like
pm timer.

The huge delta is converted to nanoseconds and added to xtime, which
is then observable by the caller. The next gettimeofday call on CPU1
will show the correct time again as now the TSC has advanced above the
reference value.

To prevent this TSC specific wreckage we need to compare the TSC value
against the reference value and return the latter when it is larger
than the actual TSC value.

I pondered to mark the TSC unstable when the readout is smaller than
the reference value, but this would render an otherwise good and fast
clocksource unusable without a real good reason.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-04 18:36:49 +02:00