Commit Graph

83370 Commits

Author SHA1 Message Date
Christoph Lameter
f61396aed9 Move count_partial before kmem_cache_shrink
Move the counting function for objects in partial slabs so that it is placed
before kmem_cache_shrink.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2008-02-04 10:56:01 -08:00
Christoph Lameter
151c602f79 SLUB: Fix sysfs refcounting
If CONFIG_SYSFS is set then free the kmem_cache structure when
sysfs tells us its okay.

Otherwise there is the danger (as pointed out by
Al Viro) that sysfs thinks the kobject still exists after
kmem_cache_destroy() removed it.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Reviewed-by: Pekka J Enberg <penberg@cs.helsinki.fi>
2008-02-04 10:56:01 -08:00
Harvey Harrison
e374d48356 slub: fix shadowed variable sparse warnings
Introduce 'len' at outer level:
mm/slub.c:3406:26: warning: symbol 'n' shadows an earlier one
mm/slub.c:3393:6: originally declared here

No need to declare new node:
mm/slub.c:3501:7: warning: symbol 'node' shadows an earlier one
mm/slub.c:3491:6: originally declared here

No need to declare new x:
mm/slub.c:3513:9: warning: symbol 'x' shadows an earlier one
mm/slub.c:3492:6: originally declared here

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Christoph Lameter <clameter@sgi.com>
2008-02-04 10:56:01 -08:00
Russell King
0d899e1b00 Merge branches 'at91', 'ixp', 'master', 'misc', 'pxa' and 'realview' into devel
* at91:
  [ARM] 4802/1: Fix typo and remove vague comment
  [ARM] 4660/3: at91: allow selecting UART for early kernel messages
  [ARM] 4739/1: at91sam9263: make gpio bank C and D irqs work

* ixp:
  [ARM] 4809/2: ixp4xx: Merge dsmg600-power.c into dsmg600-setup.c
  [ARM] 4808/2: ixp4xx: Merge nas100d-power.c into nas100d-setup.c
  [ARM] 4807/2: ixp4xx: Merge nslu2-power.c into nslu2-setup.c
  [ARM] 4806/1: ixp4xx: Ethernet support for the nslu2 and nas100d boards
  [ARM] 4805/1: ixp4xx: Use leds-gpio driver instead of IXP4XX-GPIO-LED driver
  [ARM] 4715/2: Ethernet support for IXDP425 boards
  [ARM] 4714/2: Headers for IXP4xx built-in Ethernet and WAN drivers
  [ARM] 4713/3: Adds drivers for IXP4xx QMgr and NPE features
  [ARM] 4712/2: Adds functions to read and write IXP4xx "feature" bits
  [ARM] 4774/2: ixp4xx: Register dsmg600 rtc i2c_board_info
  [ARM] 4773/2: ixp4xx: Register nas100d rtc i2c_board_info
  [ARM] 4772/2: ixp4xx: Register nslu2 rtc i2c_board_info
  [ARM] 4769/2: ixp4xx: Button updates for the dsmg600 board
  [ARM] 4768/2: ixp4xx: Button and LED updates for the nas100d board
  [ARM] 4767/2: ixp4xx: Add bitops.h include to io.h
  [ARM] 4766/2: ixp4xx: Update ixp4xx_defconfig, enabling all supported boards

* master:
  [ARM] 4810/1: - Fix 'section mismatch' building warnings
  [ARM] xtime_seqlock: fix more ARM machines for xtime deadlocking
  [ARM] 21285 serial: fix build error

* misc:
  [ARM] 4736/1: Export atags to userspace and allow kexec to use customised atags

* pxa:
  [ARM] 4798/1: pcm027: fix missing header file
  [ARM] 4803/1: pxa: fix building issue of poodle.c caused by patch 4737/1
  [ARM] 4801/1: pxa: fix building issues of missing pxa2xx-regs.h
  [ARM] pxa: introduce sysdev for pxa3xx static memory controller
  [ARM] pxa: add preliminary suspend/resume code for pxa3xx
  [ARM] pxa: introduce sysdev for GPIO register saving/restoring
  [ARM] pxa: introduce sysdev for IRQ register saving/restoring
  [ARM] pxa: fix the warning of undeclared "struct pxaohci_platform_data"
  [ARM] pxa: change set_kset_name() to direct name assignment for MFP sysclass

* realview:
  [ARM] 4822/1: RealView: Change the REALVIEW_MPCORE configuration option
  [ARM] 4821/1: RealView: Remove the platform dependencies from localtimer.c
  [ARM] 4820/1: RealView: Select the timer IRQ at run-time
  [ARM] 4819/1: RealView: Fix entry-macro.S to work with multiple platforms
  [ARM] 4818/1: RealView: Add core-tile detection
  [ARM] 4817/1: RealView: Move the AMBA resource definitions to realview_eb.c
  [ARM] 4816/1: RealView: Move the platform-specific definitions into board-eb.h
  [ARM] 4815/1: RealView: Add clockevents suport for the local timers
  [ARM] 4814/1: RealView: Add broadcasting clockevents support for ARM11MPCore
  [ARM] 4813/1: Add SMP helper functions for clockevents support
  [ARM] 4812/1: RealView: clockevents support for the RealView platforms
  [ARM] 4811/1: RealView: clocksource support for the RealView platforms
2008-02-04 17:54:39 +00:00
Catalin Marinas
41579f49da [ARM] 4822/1: RealView: Change the REALVIEW_MPCORE configuration option
This patch changes the REALVIEW_MPCORE configuration option to
REALVIEW_EB_ARM11MP since this is only specific to RealView/EB.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-02-04 17:52:28 +00:00
Catalin Marinas
39e823e35b [ARM] 4821/1: RealView: Remove the platform dependencies from localtimer.c
This patch removes the TWD_BASE macro used to set up and configure the
local timers on ARM11MPCore. The twd_base_addr and twd_size variables
are defined in localtimer.c and set from the realview_eb_init function.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-02-04 17:52:27 +00:00
Catalin Marinas
8cc4c5488a [ARM] 4820/1: RealView: Select the timer IRQ at run-time
This patch sets the timer IRQ at run-time by moving the sys_timer
structure and the timer_init function to the realview_eb.c file. This
allows multiple RealView platforms to be compiled in the same kernel
image.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-02-04 17:52:26 +00:00
Catalin Marinas
c4057f5260 [ARM] 4819/1: RealView: Fix entry-macro.S to work with multiple platforms
This patch modifies the get_irqnr_preamble macro to work with multiple
platforms at run-time by reading the address of the GIC controller from
the gic_cpu_base_addr variable. This variable is defined in core.c and
intialised in realview_eb.c (gic_init_irq).

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-02-04 17:52:25 +00:00
Catalin Marinas
7dd19e755d [ARM] 4818/1: RealView: Add core-tile detection
This patch adds the core-tile detection and only enables devices if the
corresponding tile is present. It currently detects the ARM11MPCore via
the core_tile_eb11mp() macro.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-02-04 17:52:24 +00:00
Catalin Marinas
0fc2a1616f [ARM] 4817/1: RealView: Move the AMBA resource definitions to realview_eb.c
This patch moves the IRQ and DMA definitions from core.h into
realview_eb.c since they are platform-specific. It adds a
realview_eb11mp_fixup function to adjust the IRQ numbers if the
ARM11MPCore tile is fitted. The realview_smc91x_device is also moved
from core.c into realview_eb.c.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-02-04 17:52:23 +00:00
Catalin Marinas
356cb470b8 [ARM] 4816/1: RealView: Move the platform-specific definitions into board-eb.h
This patch moves the platform specific definitions from platform.h into
the board-eb.h file. It drops the INT_* definitions as they are no
longer used in irqs.h (moved to board-eb.h). It renames REALVIEW_*
macros to REALVIEW_EB_* or REALVIEW_EB11MP_* to distinguish between
standard EB and EB + the ARM11MPCore tile. The platform.h file contains
common definitions to the RealView platforms and it is only directly
included in board-*.h files.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-02-04 17:52:21 +00:00
Catalin Marinas
93c2904d50 [ARM] 4815/1: RealView: Add clockevents suport for the local timers
This patch registers the local timers on ARM11MPCore as clock event
devices. The clock device can be set up as periodic or oneshot.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-02-04 17:52:20 +00:00
Catalin Marinas
a8655e83fc [ARM] 4814/1: RealView: Add broadcasting clockevents support for ARM11MPCore
This patch adds dummy local timers for each CPU so that the board clock
device is used to broadcast events to the other CPUs. The patch also
adds the declaration for the dummy_timer_setup function (the equivalent
of local_timer_setup when CONFIG_LOCAL_TIMERS is not set).

Due to the way clockevents work, the dummy timer on the first CPU has to
be registered before the board timer.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-02-04 17:52:19 +00:00
Catalin Marinas
3e45999096 [ARM] 4813/1: Add SMP helper functions for clockevents support
This patch adds the smp_call_function_single and smp_timer_broadcast
functions and modifies ipi_timer to call the platform-specific function
local_timer_interrupt.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-02-04 17:52:18 +00:00
Catalin Marinas
ae30ceac3c [ARM] 4812/1: RealView: clockevents support for the RealView platforms
The patch updates the RealView code to the clockevents infrastructure.
The SMP support is implemented in subsequent patches. Based on the
Versatile implementation by Kevin Hilman.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-02-04 17:52:17 +00:00
Catalin Marinas
85802afeb0 [ARM] 4811/1: RealView: clocksource support for the RealView platforms
The patch updates the RealView platform code to use the generic
clocksource infrastructure for basic time keeping. Based on the
Versatile implementation by Kevin Hilman.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-02-04 17:52:16 +00:00
Linus Torvalds
d2fc0bacd5 Merge git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86
* git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86: (78 commits)
  x86: fix RTC lockdep warning: potential hardirq recursion
  x86: cpa, micro-optimization
  x86: cpa, clean up code flow
  x86: cpa, eliminate CPA_ enum
  x86: cpa, cleanups
  x86: implement gbpages support in change_page_attr()
  x86: support gbpages in pagetable dump
  x86: add gbpages support to lookup_address
  x86: add pgtable accessor functions for gbpages
  x86: add PUD_PAGE_SIZE
  x86: add feature macros for the gbpages cpuid bit
  x86: switch direct mapping setup over to set_pte
  x86: fix page-present check in cpa_flush_range
  x86: remove cpa warning
  x86: remove now unused clear_kernel_mapping
  x86: switch pci-gart over to using set_memory_np() instead of clear_kernel_mapping()
  x86: cpa selftest, skip non present entries
  x86: CPA fix pagetable split
  x86: rename LARGE_PAGE_SIZE to PMD_PAGE_SIZE
  x86: cpa, fix lookup_address
  ...
2008-02-04 09:16:03 -08:00
Linus Torvalds
93890b71a3 Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus
* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus: (25 commits)
  virtio: balloon driver
  virtio: Use PCI revision field to indicate virtio PCI ABI version
  virtio: PCI device
  virtio_blk: implement naming for vda-vdz,vdaa-vdzz,vdaaa-vdzzz
  virtio_blk: Dont waste major numbers
  virtio_blk: provide getgeo
  virtio_net: parametrize the napi_weight for virtio receive queue.
  virtio: free transmit skbs when notified, not on next xmit.
  virtio: flush buffers on open
  virtnet: remove double ether_setup
  virtio: Allow virtio to be modular and used by modules
  virtio: Use the sg_phys convenience function.
  virtio: Put the virtio under the virtualization menu
  virtio: handle interrupts after callbacks turned off
  virtio: reset function
  virtio: populate network rings in the probe routine, not open
  virtio: Tweak virtio_net defines
  virtio: Net header needs hdr_len
  virtio: remove unused id field from struct virtio_blk_outhdr
  virtio: clarify NO_NOTIFY flag usage
  ...
2008-02-04 08:00:54 -08:00
Linus Torvalds
f5bb3a5e9d Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial
* git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial: (79 commits)
  Jesper Juhl is the new trivial patches maintainer
  Documentation: mention email-clients.txt in SubmittingPatches
  fs/binfmt_elf.c: spello fix
  do_invalidatepage() comment typo fix
  Documentation/filesystems/porting fixes
  typo fixes in net/core/net_namespace.c
  typo fix in net/rfkill/rfkill.c
  typo fixes in net/sctp/sm_statefuns.c
  lib/: Spelling fixes
  kernel/: Spelling fixes
  include/scsi/: Spelling fixes
  include/linux/: Spelling fixes
  include/asm-m68knommu/: Spelling fixes
  include/asm-frv/: Spelling fixes
  fs/: Spelling fixes
  drivers/watchdog/: Spelling fixes
  drivers/video/: Spelling fixes
  drivers/ssb/: Spelling fixes
  drivers/serial/: Spelling fixes
  drivers/scsi/: Spelling fixes
  ...
2008-02-04 07:58:52 -08:00
Linus Torvalds
9853832c49 Merge branch 'locks' of git://linux-nfs.org/~bfields/linux
* 'locks' of git://linux-nfs.org/~bfields/linux:
  pid-namespaces-vs-locks-interaction
  file locks: Use wait_event_interruptible_timeout()
  locks: clarify posix_locks_deadlock
2008-02-04 07:58:03 -08:00
Haavard Skinnemoen
b21761ff18 kbuild: Fix instrumentation removal breakage on avr32
AVR32 still includes Kconfig.instrumentation, so it won't build after
this...

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Acked-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-04 07:57:38 -08:00
Linus Torvalds
519cb68807 Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild
* git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild:
  scsi: fix dependency bug in aic7 Makefile
  kbuild: add svn revision information to setlocalversion
  kbuild: do not warn about __*init/__*exit symbols being exported
  Move Kconfig.instrumentation to arch/Kconfig and init/Kconfig
  Add HAVE_KPROBES
  Add HAVE_OPROFILE
  Create arch/Kconfig
  Fix ARM to play nicely with generic Instrumentation menu
  kconfig: ignore select of unknown symbol
  kconfig: mark config as changed when loading an alternate config
  kbuild: Spelling/grammar fixes for config DEBUG_SECTION_MISMATCH
  Remove __INIT_REFOK and __INITDATA_REFOK
  kbuild: print only total number of section mismatces found
2008-02-04 07:56:17 -08:00
Nick Piggin
2f98735c9c vm audit: add VM_DONTEXPAND to mmap for drivers that need it
Drivers that register a ->fault handler, but do not range-check the
offset argument, must set VM_DONTEXPAND in the vm_flags in order to
prevent an expanding mremap from overflowing the resource.

I've audited the tree and attempted to fix these problems (usually by
adding VM_DONTEXPAND where it is not obvious).

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-04 07:55:38 -08:00
Geert Uytterhoeven
fe2528b96b ADB: Add missing #include <linux/platform_device.h>
Commit c9f6d3d5c6 ("[POWERPC] adb: Replace
sleep notifier with platform driver suspend/resume hooks") introduced
compile errors on m68k because <linux/platform_device.h> is not
explicitly included.  On powerpc, it's pulled in through <asm/prom.h>.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-04 07:51:23 -08:00
Andrew Morton
795d45b22c x86: fix RTC lockdep warning: potential hardirq recursion
After disabling both CONFIG_DEBUG_LOCKING_API_SELFTESTS and netconsole
(using current mainline) I get a login prompt, and also...

[    5.181668] SELinux: policy loaded with handle_unknown=deny
[    5.183315] type=1403 audit(1202100038.157:3): policy loaded auid=4294967295 ses=4294967295
[    5.822073] SELinux: initialized (dev usbfs, type usbfs), uses genfs_contexts
[    7.819146] ------------[ cut here ]------------
[    7.819146] WARNING: at kernel/lockdep.c:2033 trace_hardirqs_on+0x9b/0x10d()
[    7.819146] Modules linked in: generic ext3 jbd ide_disk ide_core
[    7.819146] Pid: 399, comm: hwclock Not tainted 2.6.24 #4
[    7.819146]  [<c011d140>] warn_on_slowpath+0x41/0x51
[    7.819146]  [<c01364a9>] ? lock_release_holdtime+0x50/0x56
[    7.819146]  [<c013770c>] ? check_usage_forwards+0x19/0x3b
[    7.819146]  [<c01390c4>] ? __lock_acquire+0xac3/0xb0b
[    7.819146]  [<c0108c98>] ? native_sched_clock+0x8b/0x9f
[    7.819146]  [<c01364a9>] ? lock_release_holdtime+0x50/0x56
[    7.819146]  [<c030ca6c>] ? _spin_unlock_irq+0x22/0x42
[    7.819146]  [<c013848b>] trace_hardirqs_on+0x9b/0x10d
[    7.819146]  [<c030ca6c>] _spin_unlock_irq+0x22/0x42
[    7.819146]  [<c011481e>] hpet_rtc_interrupt+0xdf/0x290
[    7.819146]  [<c014ea90>] handle_IRQ_event+0x1a/0x46
[    7.819146]  [<c014f8ea>] handle_edge_irq+0xbe/0xff
[    7.819146]  [<c0106e08>] do_IRQ+0x6d/0x84
[    7.819146]  [<c0105596>] common_interrupt+0x2e/0x34
[    7.819146]  [<c013007b>] ? ktime_get_ts+0x8/0x3f
[    7.819146]  [<c0139420>] ? lock_release+0x167/0x16f
[    7.819146]  [<c017974a>] ? core_sys_select+0x2c/0x327
[    7.819146]  [<c0179792>] core_sys_select+0x74/0x327
[    7.819146]  [<c0108c98>] ? native_sched_clock+0x8b/0x9f
[    7.819146]  [<c01364a9>] ? lock_release_holdtime+0x50/0x56
[    7.819146]  [<c030ca6c>] ? _spin_unlock_irq+0x22/0x42
[    7.819146]  [<c01384d6>] ? trace_hardirqs_on+0xe6/0x10d
[    7.819146]  [<c030ca77>] ? _spin_unlock_irq+0x2d/0x42
[    7.819146]  [<c023b437>] ? rtc_do_ioctl+0x11b/0x677
[    7.819146]  [<c01c487e>] ? inode_has_perm+0x5e/0x68
[    7.819146]  [<c01364a9>] ? lock_release_holdtime+0x50/0x56
[    7.819146]  [<c0108c98>] ? native_sched_clock+0x8b/0x9f
[    7.819146]  [<c01c490b>] ? file_has_perm+0x83/0x8c
[    7.819146]  [<c023ba08>] ? rtc_ioctl+0xf/0x11
[    7.819146]  [<c017898d>] ? do_ioctl+0x55/0x67
[    7.819146]  [<c0179d15>] sys_select+0x93/0x163
[    7.819146]  [<c0104b39>] ? sysenter_past_esp+0x9a/0xa5
[    7.819146]  [<c0104afe>] sysenter_past_esp+0x5f/0xa5
[    7.819146]  =======================
[    7.819146] ---[ end trace 96540ca301ffb84c ]---
[    7.819210] rtc: lost 6 interrupts
[    7.870668] type=1400 audit(1202128840.794:4): avc:  denied  { audit_write } for  pid=399 comm="hwclock" capability=29 scontext=system_u:system_r:hwclock_t:s0 tcontext=system_u:system_r:hwclock_t:s0 tclass=capability
[    9.538866] input: PC Speaker as /class/input/input5

Because hpet_rtc_interrupt()'s call to get_rtc_time() ends up
resolving to include/asm-generic/rtc.h's (hilariously inlined)
get_rtc_time(), which does spin_unlock_irq() from hard IRQ context.

The obvious patch fixes it.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-04 16:48:10 +01:00
Thomas Gleixner
7b610eec7a x86: cpa, micro-optimization
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-04 16:48:10 +01:00
Ingo Molnar
87f7f8fe32 x86: cpa, clean up code flow
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-04 16:48:10 +01:00
Ingo Molnar
beaff6333b x86: cpa, eliminate CPA_ enum
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-04 16:48:09 +01:00
Ingo Molnar
9df84993cb x86: cpa, cleanups
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-04 16:48:09 +01:00
Andi Kleen
f07333fd14 x86: implement gbpages support in change_page_attr()
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-04 16:48:09 +01:00
Andi Kleen
b536022227 x86: support gbpages in pagetable dump
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-04 16:48:09 +01:00
Andi Kleen
c2f71ee214 x86: add gbpages support to lookup_address
[ tglx@linutronix.de: fix bootup crash on sparse mappings. ]

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-04 16:48:09 +01:00
Andi Kleen
61e19a347a x86: add pgtable accessor functions for gbpages
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-04 16:48:09 +01:00
Andi Kleen
fbff3c21af x86: add PUD_PAGE_SIZE
a PUD entry covers 1GB of virtual memory.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-04 16:48:09 +01:00
Andi Kleen
019c3e7c5e x86: add feature macros for the gbpages cpuid bit
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-04 16:48:09 +01:00
Andi Kleen
d4f71f7969 x86: switch direct mapping setup over to set_pte
Use set_pte() for setting up the 2MB pages in the direct mapping.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-04 16:48:09 +01:00
Thomas Gleixner
7bfb72e847 x86: fix page-present check in cpa_flush_range
pte_present() might return true for PROT_NONE mappings.
Explicitely check the present bit.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-04 16:48:08 +01:00
Ingo Molnar
6ce9fc17d9 x86: remove cpa warning
this race is legit and can happen on SMP systems.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-04 16:48:08 +01:00
Andi Kleen
bde1965ce8 x86: remove now unused clear_kernel_mapping
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-04 16:48:08 +01:00
Andi Kleen
28d6ee41a6 x86: switch pci-gart over to using set_memory_np() instead of clear_kernel_mapping()
pci-gart needs to unmap the IOMMU aperture to prevent cache corruptions.

Switch this over to using set_memory_np() instead of clear_kernel_mapping().

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-04 16:48:08 +01:00
Thomas Gleixner
64f351d197 x86: cpa selftest, skip non present entries
pud and pmd entries in the RAM area might be marked as non present.
Do not try to modify them in the selftest.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-04 16:48:08 +01:00
Thomas Gleixner
07cf89c05f x86: CPA fix pagetable split
Move the readout of the large entry into the spinlock section to
prevent an unlikely but possible race.

Mark the pmd/pud entry present after the split. We preserved the
non present bit in the new split mapping.

Remove the stale gfp_flags double initialization.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-04 16:48:08 +01:00
Andi Kleen
31422c51e0 x86: rename LARGE_PAGE_SIZE to PMD_PAGE_SIZE
Fix up all users.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-04 16:48:08 +01:00
Thomas Gleixner
9a14aefc1d x86: cpa, fix lookup_address
lookup_address() returns a wrong level and a wrong pointer to a non
existing pte, when pmd or pud entries are marked !present. This
happens for example due to boot time mapping of GART into the low
memory space.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-04 16:48:07 +01:00
Ingo Molnar
34508f66b6 x86: AMD Athlon X2 hard hang fix
An Athlon 64 X2 test system showed hard hangs shortly after marking
the kernel text read-only, if we tried to preserve largepages and
changed the PSE entry from RW to RO. The pagetable code itself is
correct, it's the CPU that locked up hard (and not even the NMI
watchdog could punch through that hard hang).

So be conservative and always do splitups - like we did in the past.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-04 16:48:07 +01:00
Thomas Gleixner
65e074dffa x86: cpa, preserve large pages if possible
When CPA is called on a range which fits into a large page mapping,
avoid to split the page when:

1) There is no change of attributes
2) The range to change is a complete large mapping

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-04 16:48:07 +01:00
Thomas Gleixner
f4ae5da0e8 x86: cpa, check if we changed anything and tlb flushing is necessary
Flush tlbs only when there was a real change.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-04 16:48:07 +01:00
Thomas Gleixner
72e458dfa6 x86: introduce struct cpa_data
The number of arguments which need to be transported is increasing
and we want to add flush optimizations and large page preserving.

Create struct cpa data and pass a pointer instead of increasing the
number of arguments further.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-04 16:48:07 +01:00
Andi Kleen
6bb8383beb x86: cpa, only flush the cache if the caching attributes have changed
We only need to flush the caches in cpa() if the the caching attributes
have changed. Otherwise only flush the TLBs.

This checks the PAT bits too although they are currently not used by
the kernel.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-04 16:48:06 +01:00
Andi Kleen
9bf5a47572 x86: cpa, add the PAT bit defines
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-04 16:48:06 +01:00