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2008-02-07SLUB: Alternate fast paths using cmpxchg_localChristoph Lameter
Provide an alternate implementation of the SLUB fast paths for alloc and free using cmpxchg_local. The cmpxchg_local fast path is selected for arches that have CONFIG_FAST_CMPXCHG_LOCAL set. An arch should only set CONFIG_FAST_CMPXCHG_LOCAL if the cmpxchg_local is faster than an interrupt enable/disable sequence. This is known to be true for both x86 platforms so set FAST_CMPXCHG_LOCAL for both arches. Currently another requirement for the fastpath is that the kernel is compiled without preemption. The restriction will go away with the introduction of a new per cpu allocator and new per cpu operations. The advantages of a cmpxchg_local based fast path are: 1. Potentially lower cycle count (30%-60% faster) 2. There is no need to disable and enable interrupts on the fast path. Currently interrupts have to be disabled and enabled on every slab operation. This is likely avoiding a significant percentage of interrupt off / on sequences in the kernel. 3. The disposal of freed slabs can occur with interrupts enabled. The alternate path is realized using #ifdef's. Several attempts to do the same with macros and inline functions resulted in a mess (in particular due to the strange way that local_interrupt_save() handles its argument and due to the need to define macros/functions that sometimes disable interrupts and sometimes do something else). [clameter: Stripped preempt bits and disabled fastpath if preempt is enabled] Signed-off-by: Christoph Lameter <clameter@sgi.com> Reviewed-by: Pekka Enberg <penberg@cs.helsinki.fi> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2008-02-07Merge branch 'release' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (112 commits) ACPI: fix build warning Revert "cpuidle: build fix for non-x86" ACPI: update intrd DSDT override console messages ACPI: update DSDT override documentation ACPI: Add "acpi_no_initrd_override" kernel parameter ACPI: its a directory not a folder.... ACPI: misc cleanups ACPI: add missing prink prefix strings ACPI: cleanup acpi.h ACPICA: fix CONFIG_ACPI_DEBUG_FUNC_TRACE build ACPI: video: Ignore ACPI video devices that aren't present in hardware ACPI: video: reset brightness on resume ACPI: video: call ACPI notifier chain for ACPI video notifications ACPI: create notifier chain to get hotkey events to graphics driver ACPI: video: delete unused display switch on hotkey event code ACPI: video: create "brightness_switch_enabled" modparam cpuidle: Add a poll_idle method ACPI: cpuidle: Support C1 idle time accounting ACPI: enable MWAIT for C1 idle ACPI: idle: Fix acpi_safe_halt usages and interrupt enabling/disabling ...
2008-02-07Merge git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreqLinus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq: [CPUFREQ] Add missing printk levels to e_powersaver [CPUFREQ] Fix sparse warning in powernow-k8 [CPUFREQ] Support Model D parts and newer in e_powersaver [CPUFREQ] Powernow-k8: Update to support the latest Turion processors [CPUFREQ] fix configuration help message [CPUFREQ] powernow-k8 print pstate instead of fid/did for family 10h [CPUFREQ] Eliminate cpufreq_userspace scaling_setspeed deadlock [CPUFREQ] gx-suspmod.c: use boot_cpu_data instead of current_cpu_data [CPUFREQ] fix incorrect comment on show_available_freqs() in freq_table.c [CPUFREQ] drivers/cpufreq: Add missing "space" [CPUFREQ] arch/x86: Add missing "space" [CPUFREQ] Remove pointless Kconfig dependancy
2008-02-07I8K: add i8k driver to the x86_64 KconfigBradley Smith
Adds i8k driver to the x86_64 Kconfig. Signed-off-by: Bradley Smith <bradjsmith@btinternet.com> Cc: Frank Sorenson <frank@tuxrocks.com> Cc: Jeff Garzik <jeff@garzik.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-07Sanitize the type of struct user.u_ar0H. Peter Anvin
struct user.u_ar0 is defined to contain a pointer offset on all architectures in which it is defined (all architectures which define an a.out format except SPARC.) However, it has a pointer type in the headers, which is pointless -- <asm/user.h> is not exported to userspace, and it just makes the code messy. Redefine the field as "unsigned long" (which is the same size as a pointer on all Linux architectures) and change the setting code to user offsetof() instead of hand-coded arithmetic. Cc: Linux Arch Mailing List <linux-arch@vger.kernel.org> Cc: Bryan Wu <bryan.wu@analog.com> Cc: Roman Zippel <zippel@linux-m68k.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Lennert Buytenhek <kernel@wantstofly.org> Cc: Håvard Skinnemoen <hskinnemoen@atmel.com> Cc: Mikael Starvik <starvik@axis.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Tony Luck <tony.luck@intel.com> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-07vmcoreinfo: fix the configuration dependenciesKen'ichi Ohmichi
This patch fixes the configuration dependencies in the vmcoreinfo data. i386's "node_data" is defined in arch/x86/mm/discontig_32.c, and x86_64's one is defined in arch/x86/mm/numa_64.c. They depend on CONFIG_NUMA: arch/x86/mm/Makefile_32:7 obj-$(CONFIG_NUMA) += discontig_32.o arch/x86/mm/Makefile_64:7 obj-$(CONFIG_NUMA) += numa_64.o ia64's "pgdat_list" is defined in arch/ia64/mm/discontig.c, and it depends on CONFIG_DISCONTIGMEM and CONFIG_SPARSEMEM: arch/ia64/mm/Makefile:9-10 obj-$(CONFIG_DISCONTIGMEM) += discontig.o obj-$(CONFIG_SPARSEMEM) += discontig.o ia64's "node_memblk" is defined in arch/ia64/mm/numa.c, and it depends on CONFIG_NUMA: arch/ia64/mm/Makefile:8 obj-$(CONFIG_NUMA) += numa.o Signed-off-by: Ken'ichi Ohmichi <oomichi@mxs.nes.nec.co.jp> Acked-by: Simon Horman <horms@verge.net.au> Cc: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-07Use BOOTMEM_EXCLUSIVE for kdumpBernhard Walle
Use the BOOTMEM_EXCLUSIVE, introduced in the previous patch, to avoid conflicts while reserving the memory for the kdump capture kernel (crashkernel=). Signed-off-by: Bernhard Walle <bwalle@suse.de> Cc: <linux-arch@vger.kernel.org> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Vivek Goyal <vgoyal@in.ibm.com> Acked-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-07Introduce flags for reserve_bootmem()Bernhard Walle
This patchset adds a flags variable to reserve_bootmem() and uses the BOOTMEM_EXCLUSIVE flag in crashkernel reservation code to detect collisions between crashkernel area and already used memory. This patch: Change the reserve_bootmem() function to accept a new flag BOOTMEM_EXCLUSIVE. If that flag is set, the function returns with -EBUSY if the memory already has been reserved in the past. This is to avoid conflicts. Because that code runs before SMP initialisation, there's no race condition inside reserve_bootmem_core(). [akpm@linux-foundation.org: coding-style fixes] [akpm@linux-foundation.org: fix powerpc build] Signed-off-by: Bernhard Walle <bwalle@suse.de> Cc: <linux-arch@vger.kernel.org> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Vivek Goyal <vgoyal@in.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-07Revert "cpuidle: build fix for non-x86"Len Brown
This reverts commit f757397097d0713c949af76dccabb65a2785782e. which ironically broke the ia64 build
2008-02-07Merge branches 'release' and 'fluff' into releaseLen Brown
Conflicts: drivers/acpi/scan.c include/linux/acpi.h Signed-off-by: Len Brown <len.brown@intel.com>
2008-02-07ACPI: misc cleanupsAdrian Bunk
This patch contains the following possible cleanups: - make the following needlessly global code static: - drivers/acpi/bay.c:dev_attr_eject - drivers/acpi/bay.c:dev_attr_present - drivers/acpi/dock.c:dev_attr_docked - drivers/acpi/dock.c:dev_attr_flags - drivers/acpi/dock.c:dev_attr_uid - drivers/acpi/dock.c:dev_attr_undock - drivers/acpi/pci_bind.c:acpi_pci_unbind() - drivers/acpi/pci_link.c:acpi_link_lock - drivers/acpi/sbs.c:acpi_sbs_callback() - drivers/acpi/sbshc.c:acpi_smbus_transaction() - drivers/acpi/sleep/main.c:acpi_sleep_prepare() - #if 0 the following unused global functions: - drivers/acpi/numa.c:acpi_unmap_pxm_to_node() - remove the following unused EXPORT_SYMBOL's: - acpi_register_gsi - acpi_unregister_gsi - acpi_strict - acpi_bus_receive_event - register_acpi_bus_type - unregister_acpi_bus_type - acpi_os_printf - acpi_os_sleep - acpi_os_stall - acpi_os_read_pci_configuration - acpi_os_create_semaphore - acpi_os_delete_semaphore - acpi_os_wait_semaphore - acpi_os_signal_semaphore - acpi_os_signal - acpi_pci_irq_enable - acpi_get_pxm Signed-off-by: Adrian Bunk <bunk@kernel.org> Acked-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Len Brown <len.brown@intel.com>
2008-02-07Merge branches 'release' and 'throttling-domains' into releaseLen Brown
2008-02-07Merge branches 'release', 'misc' and 'misc-2.6.25' into releaseLen Brown
2008-02-07Merge branches 'release', 'cpuidle-2.6.25' and 'idle' into releaseLen Brown
2008-02-07Merge branches 'release', 'bugzilla-6217', 'bugzilla-6629', 'bugzilla-6933', ↵Len Brown
'bugzilla-7186', 'bugzilla-8269', 'bugzilla-8570', 'bugzilla-9139', 'bugzilla-9277', 'bugzilla-9341', 'bugzilla-9444', 'bugzilla-9614', 'bugzilla-9643' and 'bugzilla-9644' into release
2008-02-07cpuidle: Add a poll_idle methodvenkatesh.pallipadi@intel.com
Add a default poll idle state with 0 latency. Provides an option to users to use poll_idle by using 0 as the latency requirement. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2008-02-06[CPUFREQ] Add missing printk levels to e_powersaverDave Jones
Signed-off-by: Dave Jones <davej@redhat.com>
2008-02-06[CPUFREQ] Fix sparse warning in powernow-k8Dave Jones
arch/x86/kernel/cpu/cpufreq/powernow-k8.c:1238:9: warning: symbol '__ptr' shadows an earlier one arch/x86/kernel/cpu/cpufreq/powernow-k8.c:1238:9: originally declared here Signed-off-by: Dave Jones <davej@redhat.com>
2008-02-06[CPUFREQ] Support Model D parts and newer in e_powersaverJesse Ahrens
Patch by VIA that updates e_powersaver.c to work with our model D parts and newer. From: Jesse Ahrens <jahrens@centtech.com> Signed-off-by: Dave Jones <davej@redhat.com>
2008-02-06[CPUFREQ] Powernow-k8: Update to support the latest Turion processorsMark Langsdorf
The latest series of Turion X2 processors have a new XFAM model. Add support for them to powernow-k8.h. Signed-off-by: Mark Langsdorf <mark.langsdorf@amd.com> Signed-off-by: Dave Jones <davej@redhat.com>
2008-02-06[CPUFREQ] powernow-k8 print pstate instead of fid/did for family 10hYinghai Lu
powernow-k8: Found 1 Quad-Core AMD Opteron(tm) Processor 8354 processors (4 cpu cores) (version 2.20.00) powernow-k8: 0 : fid 0x0 did 0x0 (2200 MHz) powernow-k8: 1 : fid 0x0 did 0x0 (2000 MHz) powernow-k8: 2 : fid 0x0 did 0x0 (1700 MHz) powernow-k8: 3 : fid 0x0 did 0x0 (1400 MHz) powernow-k8: 4 : fid 0x0 did 0x0 (1100 MHz) actually index for CPU_HW_PSTATE is pstate instead of fid/vid So print it out as pstate. powernow-k8: Found 1 Quad-Core AMD Opteron(tm) Processor 8354 processors (4 cpu cores) (version 2.20.00) powernow-k8: 0 : pstate 0 (2200 MHz) powernow-k8: 1 : pstate 1 (2000 MHz) powernow-k8: 2 : pstate 2 (1700 MHz) powernow-k8: 3 : pstate 3 (1400 MHz) powernow-k8: 4 : pstate 4 (1100 MHz) Signed-off-by: Yinghai Lu <yinghai.lu@sun.com> Cc: "Langsdorf, Mark" <mark.langsdorf@amd.com> Cc: "Herrmann3, Andreas" <Andreas.Herrmann3@amd.com> Signed-off-by: Dave Jones <davej@redhat.com>
2008-02-06[CPUFREQ] gx-suspmod.c: use boot_cpu_data instead of current_cpu_dataDave Young
In preemptible kernel will report BUG: using smp_processor_id() in preemptible, so use boot_cpu_data instead of current_cpu_data. discussion in : http://lkml.org/lkml/2007/7/25/32 Signed-off-by: Dave Young <hidave.darkstar@gmail.com> CC: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Dave Jones <davej@redhat.com>
2008-02-06[CPUFREQ] arch/x86: Add missing "space"Joe Perches
Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Dave Jones <davej@redhat.com>
2008-02-06[CPUFREQ] Remove pointless Kconfig dependancyDave Jones
X86_ELAN already depends on X86_32 Signed-off-by: Dave Jones <davej@redhat.com>
2008-02-06Merge git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86: x86: fix deadlock, make pgd_lock irq-safe virtio: fix trivial build bug x86: fix mttr trimming x86: delay CPA self-test and repeat it x86: fix 64-bit sections generic: add __FINITDATA x86: remove suprious ifdefs from pageattr.c x86: mark the .rodata section also NX x86: fix iret exception recovery on 64-bit cpuidle: dubious one-bit signed bitfield in cpuidle.h x86: fix sparse warnings in powernow-k8.c x86: fix sparse error in traps_32.c x86: trivial sparse/checkpatch in quirks.c x86 ptrace: disallow null cs/ss MAINTAINERS: RDC R-321x SoC maintainer brk randomization: introduce CONFIG_COMPAT_BRK brk: check the lower bound properly x86: remove X2 workaround x86: make spurious fault handler aware of large mappings x86: make traps on entry code be debuggable in user space, 64-bit
2008-02-06x86: fix deadlock, make pgd_lock irq-safeIngo Molnar
lockdep just caught this one: ================================= [ INFO: inconsistent lock state ] 2.6.24 #38 --------------------------------- inconsistent {in-softirq-W} -> {softirq-on-W} usage. swapper/1 [HC0[0]:SC0[0]:HE1:SE1] takes: (pgd_lock){-+..}, at: [<ffffffff8022a9ea>] mm_init+0x1da/0x250 {in-softirq-W} state was registered at: [<ffffffffffffffff>] 0xffffffffffffffff irq event stamp: 394559 hardirqs last enabled at (394559): [<ffffffff80267f0a>] get_page_from_freelist+0x30a/0x4c0 hardirqs last disabled at (394558): [<ffffffff80267d25>] get_page_from_freelist+0x125/0x4c0 softirqs last enabled at (393952): [<ffffffff80232f8e>] __do_softirq+0xce/0xe0 softirqs last disabled at (393945): [<ffffffff8020c57c>] call_softirq+0x1c/0x30 other info that might help us debug this: no locks held by swapper/1. stack backtrace: Pid: 1, comm: swapper Not tainted 2.6.24 #38 Call Trace: [<ffffffff8024e1fb>] print_usage_bug+0x18b/0x190 [<ffffffff8024f55d>] mark_lock+0x53d/0x560 [<ffffffff8024fffa>] __lock_acquire+0x3ca/0xed0 [<ffffffff80250ba8>] lock_acquire+0xa8/0xe0 [<ffffffff8022a9ea>] ? mm_init+0x1da/0x250 [<ffffffff809bcd10>] _spin_lock+0x30/0x70 [<ffffffff8022a9ea>] mm_init+0x1da/0x250 [<ffffffff8022aa99>] mm_alloc+0x39/0x50 [<ffffffff8028b95a>] bprm_mm_init+0x2a/0x1a0 [<ffffffff8028d12b>] do_execve+0x7b/0x220 [<ffffffff80209776>] sys_execve+0x46/0x70 [<ffffffff8020c214>] kernel_execve+0x64/0xd0 [<ffffffff8020901e>] ? _stext+0x1e/0x20 [<ffffffff802090ba>] init_post+0x9a/0xf0 [<ffffffff809bc5f6>] ? trace_hardirqs_on_thunk+0x35/0x3a [<ffffffff8024f75a>] ? trace_hardirqs_on+0xba/0xd0 [<ffffffff8020c1a8>] ? child_rip+0xa/0x12 [<ffffffff8020bcbc>] ? restore_args+0x0/0x44 [<ffffffff8020c19e>] ? child_rip+0x0/0x12 turns out that pgd_lock has been used on 64-bit x86 in an irq-unsafe way for almost two years, since commit 8c914cb704a11460e. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-06x86: fix mttr trimmingYinghai Lu
Pavel Emelyanov reported that his networking card did not work and bisected it down to: " The commit 093af8d7f0ba3c6be1485973508584ef081e9f93 x86_32: trim memory by updating e820 broke my e1000 card: on loading driver says that e1000: probe of 0000:04:03.0 failed with error -5 and the interface doesn't appear. " on a 32-bit kernel, base will overflow when try to do PAGE_SHIFT, and highest_addr will always less 4G. So use pfn instead of address to avoid the overflow when more than 4g RAM is installed on a 32-bit kernel. Many thanks to Pavel Emelyanov for reporting and testing it. Bisected-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: Yinghai Lu <yinghai.lu@sun.com> Tested-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-06x86: delay CPA self-test and repeat itIngo Molnar
delay the CPA self-test so that any impact (corruption) of user-space pagetables can be triggered. Repeat the test every 30 seconds. this would have prevented the bug fixed by 8cb2a7c1e95e472b5, at its source. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-06x86: fix 64-bit sectionsSam Ravnborg
fix 64-bit section warnings. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-06x86: remove suprious ifdefs from pageattr.cArjan van de Ven
The .rodata section really should just be read only; the config option is there to make breaking up the 2Mb page an option (so people whos machines give more performance for the 2Mb case can opt to do so). But when the page gets split anyway, this is no longer an issue, so clean up the code and remove the ifdefs Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-06x86: mark the .rodata section also NXArjan van de Ven
The .rodata section shouldn't just be read-only, but also non-executable. This is free since we've broken up the 2MB page already anyway. also update test_nx to check for this. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-06x86: fix iret exception recovery on 64-bitRoland McGrath
This change broke recovery of exceptions in iret: commit 72fe4858544292ad64600765cb78bc02298c6b1c Author: Glauber de Oliveira Costa <gcosta@redhat.com> x86: replace privileged instructions with paravirt macros The ENTRY(native_iret) macro adds alignment padding before the iretq instruction, so "iret_label" no longer points exactly at the instruction. It was sloppy to leave the old "iret_label" label behind when replacing its nearby use. Removing it would have revealed the other use of the label later in the file, and upon noticing that use, anyone exercising the minimum of attention to detail expected of anyone touching this subtle code would realize it needed to change as well. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-06x86: fix sparse warnings in powernow-k8.cHarvey Harrison
arch/x86/kernel/cpu/cpufreq/powernow-k8.c:830:7: warning: symbol 'hi' shadows an earlier one arch/x86/kernel/cpu/cpufreq/powernow-k8.c:824:6: originally declared here arch/x86/kernel/cpu/cpufreq/powernow-k8.c:830:15: warning: symbol 'lo' shadows an earlier one arch/x86/kernel/cpu/cpufreq/powernow-k8.c:824:14: originally declared here Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-06x86: fix sparse error in traps_32.cHarvey Harrison
This was being used to ensure the proper alignment of the FXSAVE/FXRSTOR data. This would create a sparse error in the _correct_ cases, hiding further warnings. Use BUILD_BUG_ON instead. Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-06x86: trivial sparse/checkpatch in quirks.cHarvey Harrison
arch/x86/kernel/quirks.c:384:3: warning: returning void-valued expression arch/x86/kernel/quirks.c:387:3: warning: returning void-valued expression arch/x86/kernel/quirks.c:390:3: warning: returning void-valued expression arch/x86/kernel/quirks.c:393:3: warning: returning void-valued expression Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-06x86 ptrace: disallow null cs/ssRoland McGrath
In my revamp of the x86 ptrace code for setting register values, I accidentally omitted a check that was there in the old code. Allowing %cs to be 0 causes a bad crash in recovery from iret failure. This patch fixes that regression against 2.6.24, and adds a comment that should help prevent this subtlety from being overlooked again. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-06x86: remove X2 workaroundIngo Molnar
With the spurious handler fix, the X2 does not lock up anymore. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-06x86: make spurious fault handler aware of large mappingsThomas Gleixner
In very rare cases, on certain CPUs, we could end up in the spurious fault handler and ignore a large pud/pmd mapping. The resulting pte pointer points into the mapped physical space and dereferencing it will fault recursively. Make the code aware of large mappings and do the permission check on the pmd/pud entry, when a large pud/pmd mapping is detected. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-06x86: make traps on entry code be debuggable in user space, 64-bitRoland McGrath
Unify the x86-64 behavior for 32-bit processes that set bogus %cs/%ss values (the only ones that can fault in iret) match what the native i386 behavior is. (do not kill the task via do_exit but generate a SIGSEGV signal) [ tglx@linutronix.de: build fix ] Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-06rtc: add HPET RTC emulation to RTC_DRV_CMOSBernhard Walle
That patch adds the RTC emulation of the HPET timer to the new RTC_DRV_CMOS. The old drivers/char/rtc.ko driver had that functionality and it's important on new systems. [akpm@linux-foundation.org: unbreak alpha build] Signed-off-by: Bernhard Walle <bwalle@suse.de> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: David Brownell <david-b@pacbell.net> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Andi Kleen <ak@suse.de> Cc: john stultz <johnstul@us.ibm.com> Cc: Robert Picco <Robert.Picco@hp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06idle_regs() must be __cpuinitAdrian Bunk
Fix the following section mismatch with CONFIG_HOTPLUG=n, CONFIG_HOTPLUG_CPU=y: WARNING: vmlinux.o(.text+0x399a6): Section mismatch: reference to .init.text.5:idle_regs (between 'fork_idle' and 'get_task_mm') Signed-off-by: Adrian Bunk <bunk@kernel.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06calibrate_delay() must be __cpuinitAdrian Bunk
calibrate_delay() must be __cpuinit, not __{dev,}init. I've verified that this is correct for all users. While doing the latter, I also did the following cleanups: - remove pointless additional prototypes in C files - ensure all users #include <linux/delay.h> This fixes the following section mismatches with CONFIG_HOTPLUG=n, CONFIG_HOTPLUG_CPU=y: WARNING: vmlinux.o(.text+0x1128d): Section mismatch: reference to .init.text.1:calibrate_delay (between 'check_cx686_slop' and 'set_cx86_reorder') WARNING: vmlinux.o(.text+0x25102): Section mismatch: reference to .init.text.1:calibrate_delay (between 'smp_callin' and 'cpu_coregroup_map') Signed-off-by: Adrian Bunk <bunk@kernel.org> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Richard Henderson <rth@twiddle.net> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: Christian Zankel <chris@zankel.net> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06read_current_timer() cleanupsAndrew Morton
- All implementations can be __devinit - The function prototypes were in asm/timex.h but they all must be the same, so create a single declaration in linux/timex.h. - uninline the sparc64 version to match the other architectures - Don't bother #defining ARCH_HAS_READ_CURRENT_TIMER to a particular value. [ezk@cs.sunysb.edu: fix build] Cc: "David S. Miller" <davem@davemloft.net> Cc: Haavard Skinnemoen <hskinnemoen@atmel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05stop c_p_a corrupting the pdsHugh Dickins
When change_page_attr splits a large page on x86_32 (without PAE), it is currently corrupting every process's page directory: fix that by removing the thinko which passes down a physical instead of a virtual address. Signed-off-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05Merge branch 'agp-patches' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/airlied/agp-2.6 * 'agp-patches' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/agp-2.6: agp: remove flush_agp_mappings calls from new flush handling code intel-agp: introduce IS_I915 and do some cleanups.. [intel_agp] fix name for G35 chipset intel-agp: fixup resource handling in flush code. intel-agp: add new chipset ID agp: remove unnecessary pci_dev_put agp: remove uid comparison as security check fix AGP warning agp/intel: Add chipset flushing support for i8xx chipsets. intel-agp: add chipset flushing support agp: add chipset flushing support to AGP interface
2008-02-05add mm argument to pte/pmd/pud/pgd_freeBenjamin Herrenschmidt
(with Martin Schwidefsky <schwidefsky@de.ibm.com>) The pgd/pud/pmd/pte page table allocation functions get a mm_struct pointer as first argument. The free functions do not get the mm_struct argument. This is 1) asymmetrical and 2) to do mm related page table allocations the mm argument is needed on the free function as well. [kamalesh@linux.vnet.ibm.com: i386 fix] [akpm@linux-foundation.org: coding-syle fixes] Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05iommu sg: kill __clear_bit_string and find_next_zero_stringFUJITA Tomonori
This kills unused __clear_bit_string and find_next_zero_string (they were used by only gart and calgary IOMMUs). Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Jeff Garzik <jeff@garzik.org> Cc: James Bottomley <James.Bottomley@steeleye.com> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: Muli Ben-Yehuda <mulix@mulix.org> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05iommu sg: x86: convert gart IOMMU to use the IOMMU helperFUJITA Tomonori
This patch converts gart IOMMU to use the IOMMU helper functions. The IOMMU doesn't allocate a memory area spanning LLD's segment boundary anymore. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Jeff Garzik <jeff@garzik.org> Cc: James Bottomley <James.Bottomley@steeleye.com> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: Muli Ben-Yehuda <mulix@mulix.org> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05iommu sg: x86: convert calgary IOMMU to use the IOMMU helperFUJITA Tomonori
This patch converts calgary IOMMU to use the IOMMU helper functions. The IOMMU doesn't allocate a memory area spanning LLD's segment boundary anymore. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Jeff Garzik <jeff@garzik.org> Cc: James Bottomley <James.Bottomley@steeleye.com> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: Muli Ben-Yehuda <mulix@mulix.org> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05iommu sg merging: x86: make pci-gart iommu respect the segment size limitsFUJITA Tomonori
This patch makes pci-gart iommu respect segment size limits when merging sg lists. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Jeff Garzik <jeff@garzik.org> Cc: James Bottomley <James.Bottomley@steeleye.com> Acked-by: Jens Axboe <jens.axboe@oracle.com> Cc: Dave Airlie <airlied@linux.ie> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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