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* [IA64] Fix using uninitialized data in _PDC setupVenki Pallipadi2007-05-241-1/+1
| | | | | | | | Silly bug in _PDC data setup. Haven't seen any real side-effects of this one yet. But, needs fixing regardless. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* [IA64] start_secondary() and smp_callin() should be __cpuinitTony Luck2007-05-231-2/+2
| | | | | | | Continuing the seemingly neverending quest to stomp out "Section mismatch" warnings. Signed-off-by: Tony Luck <tony.luck@intel.com>
* Merge branch 'release' of ↵Linus Torvalds2007-05-222-7/+19
|\ | | | | | | | | | | | | | | | | | | | | 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] fix kmalloc(0) in arch/ia64/pci/pci.c [IA64] Only unwind non-running tasks. [IA64] Improve unwind checking. [IA64] Yet another section mismatch warning [IA64] Fix bogus messages about system calls not implemented.
| * [IA64] Only unwind non-running tasks.Robin Holt2007-05-221-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | Unwinding a running task has proven problematic. In one instance, the running task was attempting to unwind itself and received an interrupt between when get_wchan allocated local variables on the stack and when unw_init_from_blocked_task was called which resulted in unw_init_frame_info to place this tasks task_struct pointer over the switch stack's ar_bspstore entry. Signed-off-by: Robin Holt <holt@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * [IA64] Improve unwind checking.Robin Holt2007-05-221-7/+14
| | | | | | | | | | | | | | | | | | This patch adds some sanity checks to keep register and memory stack pointers in the unw_frame_info structure within the tasks stack address range. Signed-off-by: Robin Holt <holt@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* | all-archs: consolidate .data section definition in asm-genericSam Ravnborg2007-05-191-1/+6
| | | | | | | | | | | | | | With this consolidation we can now modify the .data section definition in one spot for all archs. Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
* | all-archs: consolidate .text section definition in asm-genericSam Ravnborg2007-05-191-1/+1
|/ | | | | | Move definition of .text section to asm-generic. Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
* [IA64] optimize pagefaults a littleChristoph Hellwig2007-05-161-8/+1
| | | | | | | | | Get rid of the notifier list and call the kprobes code directly if compiled in. This mirrors the changes that recently went into powerpc, s390 and sparc64. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Tony Luck <tony.luck@intel.com>
* [IA64] Fix section conflict of ia64_mlogbuf_finishMartin Michlmayr2007-05-151-1/+0
| | | | | | | | | | | | | | Building with GCC 4.2, I get the following error: CC arch/ia64/kernel/mca.o arch/ia64/kernel/mca.c:275: error: __ksymtab_ia64_mlogbuf_finish causes a section type conflict This is because ia64_mlogbuf_finish is both declared static and exported. Fix by removing the export (which is unneeded now). Signed-off-by: Martin Michlmayr <tbm@cyrius.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* [IA64] s/scalibility/scalability/Tony Luck2007-05-141-1/+1
| | | | | | | | Previous spelling patch from Simon Arlott broke one spot that didn't need fixing (reported by Simon within 35 minutes of the patch ... but not until after I'd applied to GIT and pushed :-( Signed-off-by: Tony Luck <tony.luck@intel.com>
* [IA64] kdump on INIT needs multi-nodes sync-up (v.2)Jay Lan2007-05-142-7/+19
| | | | | | | | | | | | | | | | | | | | The current implementation of kdump on INIT events would enter kdump processing on DIE_INIT_MONARCH_ENTER and DIE_INIT_SLAVE_ENTER events. Thus, the monarch cpu would go ahead and boot up the kdump On SN shub2 systems, this out-of-sync situation causes some slave cpus on different nodes to enter POD. This patch moves kdump entry points to DIE_INIT_MONARCH_LEAVE and DIE_INIT_SLAVE_LEAVE. It also sets kdump_in_progress variable in the DIE_INIT_MONARCH_PROCESS event to not dump all active stack traces to the console in the case of kdump. I have tested this patch on an SN machine and a HP RX2600. Signed-off-by: Jay Lan <jlan@sgi.com> Acked-by: Zou Nan hai <nanhai.zou@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* [IA64] wire up {signal,timer,event}fd syscallsTony Luck2007-05-141-0/+3
| | | | Signed-off-by: Tony Luck <tony.luck@intel.com>
* [IA64] spelling fixes: arch/ia64/Simon Arlott2007-05-1117-39/+39
| | | | | | | Spelling and apostrophe fixes in arch/ia64/. Signed-off-by: Simon Arlott <simon@fire.lp0.eu> Signed-off-by: Tony Luck <tony.luck@intel.com>
* Merge branch 'release' of ↵Linus Torvalds2007-05-116-6/+25
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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] Quicklist support for IA64 [IA64] fix Kprobes reentrancy [IA64] SN: validate smp_affinity mask on intr redirect [IA64] drivers/char/snsc_event.c:206: warning: unused variable `p' [IA64] mca.c:121: warning: 'cpe_poll_timer' defined but not used [IA64] Fix - Section mismatch: reference to .init.data:mvec_name [IA64] more warning cleanups [IA64] Wire up epoll_pwait and utimensat [IA64] Fix warnings resulting from type-checking in dev_dbg() [IA64] typo s/kenrel/kernel/
| * [IA64] fix Kprobes reentrancyAnil S Keshavamurthy2007-05-111-4/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In case of reentrance i.e when a probe handler calls a functions which inturn has a probe, we save a previous kprobe information and just single step the reentrant probe without calling the actual probe handler. During this reentracy period, if an interrupt occurs and if probe happens to trigger in the inturrupt path, then we were corrupting the previous kprobe( as we were overriding the previous kprobe info) info their by crashing the system. This patch fixes this issues by having a an array of previous kprobe info struct(with the array size of 2). This similar technique is not needed on i386 and x86_64 because by default interrupts are turn off in the break/int3 exception handler. Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * [IA64] SN: validate smp_affinity mask on intr redirectJohn Keller2007-05-111-0/+11
| | | | | | | | | | | | | | | | | | | | | | | | On SN, only allow one bit to be set in the smp_affinty mask when redirecting an interrupt. Currently setting multiple bits is allowed, but only the first bit is used in determining the CPU to redirect to. This has caused confusion among some customers. [akpm@linux-foundation.org: fixes] Signed-off-by: John Keller <jpk@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * [IA64] mca.c:121: warning: 'cpe_poll_timer' defined but not usedTony Luck2007-05-101-0/+2
| | | | | | | | | | | | | | Only shows up while building sim_defconfig because CONFIG_ACPI=n there, and all of the uses of cpe_poll_timer are inside #ifdef CONFIG_ACPI. Signed-off-by: Tony Luck <tony.luck@intel.com>
| * [IA64] Fix - Section mismatch: reference to .init.data:mvec_nameTony Luck2007-05-101-1/+1
| | | | | | | | | | | | machvec_init() should be __init. And then so should hwsw_init(). Signed-off-by: Tony Luck <tony.luck@intel.com>
| * [IA64] Wire up epoll_pwait and utimensatTony Luck2007-05-101-0/+2
| | | | | | | | | | | | Another day, another pair of new system calls. Signed-off-by: Tony Luck <tony.luck@intel.com>
| * [IA64] typo s/kenrel/kernel/Tony Luck2007-05-101-1/+1
| | | | | | | | | | | | Spotted by alert reader Robert Day. Signed-off-by: Tony Luck <tony.luck@intel.com>
* | [PATCH] audit signal recipientsAmy Griffis2007-05-111-0/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | When auditing syscalls that send signals, log the pid and security context for each target process. Optimize the data collection by adding a counter for signal-related rules, and avoiding allocating an aux struct unless we have more than one target process. For process groups, collect pid/context data in blocks of 16. Move the audit_signal_info() hook up in check_kill_permission() so we audit attempts where permission is denied. Signed-off-by: Amy Griffis <amy.griffis@hp.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | [PATCH] add SIGNAL syscall class (v3)Amy Griffis2007-05-111-0/+8
|/ | | | | | | Add a syscall class for sending signals. Signed-off-by: Amy Griffis <amy.griffis@hp.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* [IA64] sa_interrupt is deprecatedakpm@linux-foundation.org2007-05-091-1/+1
| | | | | | | Seems more than just deprecated, we can't build using SA_INTERUPT. Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6Linus Torvalds2007-05-0911-104/+132
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6: [IA64] wire up pselect, ppoll [IA64] Add TIF_RESTORE_SIGMASK [IA64] unwind did not work for processes born with CLONE_STOPPED [IA64] Optional method to purge the TLB on SN systems [IA64] SPIN_LOCK_UNLOCKED macro cleanup in arch/ia64 [IA64-SN2][KJ] mmtimer.c-kzalloc [IA64] fix stack alignment for ia32 signal handlers [IA64] - Altix: hotplug after intr redirect can crash system [IA64] save and restore cpus_allowed in cpu_idle_wait [IA64] Removal of percpu TR cleanup in kexec code [IA64] Fix some section mismatch errors
| * [IA64] wire up pselect, ppollAlexey Kuznetsov2007-05-081-2/+2
| | | | | | | | | | | | Signed-off-by: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> Signed-off-by: Alexey Dobriyan <adobriyan@openvz.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * [IA64] Add TIF_RESTORE_SIGMASKAlexey Dobriyan2007-05-084-78/+27
| | | | | | | | | | | | | | | | | | Preparation for pselect and ppoll. ia32 compat code not tested. :-( Signed-off-by: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> Signed-off-by: Alexey Dobriyan <adobriyan@openvz.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * [IA64] unwind did not work for processes born with CLONE_STOPPEDKirill Korotaev2007-05-081-3/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Minor problem for mainstream. Big problem for checkpoint/restore, because all the stopped/traced processes are born in this state, hence they cannot be checkpointed again due to failing unwind. The problem was identified as assumption in kernel unwind library that top level frame is different of syscall frame. It is the case unless process was born with CLONE_STOPPED. Author: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> Signed-Off-By: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> Signed-Off-By: Kirill Korotaev <dev@sw.ru> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * [IA64] Optional method to purge the TLB on SN systemsJack Steiner2007-05-082-5/+90
| | | | | | | | | | | | | | | | This patch adds an optional method for purging the TLB on SN IA64 systems. The change should not affect any non-SN system. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * [IA64] SPIN_LOCK_UNLOCKED macro cleanup in arch/ia64Milind Arun Choudhary2007-05-082-4/+4
| | | | | | | | | | | | | | SPIN_LOCK_UNLOCKED macro cleanup, use __SPIN_LOCK_UNLOCKED instead. Signed-off-by: Milind Arun Choudhary <milindchoudhary@gmail.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * [IA64] save and restore cpus_allowed in cpu_idle_waitSiddha, Suresh B2007-05-081-0/+2
| | | | | | | | | | | | | | | | Save and Restore the task's cpus_allowed mask, across the set_cpus_allowed() in cpu_idle_wait(). Without this, we will endup corrupting task's cpu affinity. Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * [IA64] Removal of percpu TR cleanup in kexec codeTony Luck2007-05-081-10/+1
| | | | | | | | | | | | | | | | | | | | | | The kexec code wasn't in the kernel when Ken Chen created this patch (00b65985fb2fc542b855b03fcda0d0f2bab4f442) to change the mapping of percpu area from a TR to a TC. Zou Nanhai spotted this extra piece, and Simon Horman concurred. Signed-off-by: Tony Luck <tony.luck@intel.com>
| * [IA64] Fix some section mismatch errorsTony Luck2007-05-072-2/+2
| | | | | | | | | | | | | | | | | | Section mismatch: reference to ... .init.text:prefill_possible_map from .text between 'setup_per_cpu_areas' and 'cpu_init' .init.text:iosapic_override_isa_irq from .text between 'iosapic_init' and 'iosapic_remove' Signed-off-by: Tony Luck <tony.luck@intel.com>
* | rename thread_info to stackRoman Zippel2007-05-091-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This finally renames the thread_info field in task structure to stack, so that the assumptions about this field are gone and archs have more freedom about placing the thread_info structure. Nonbroken archs which have a proper thread pointer can do the access to both current thread and task structure via a single pointer. It'll allow for a few more cleanups of the fork code, from which e.g. ia64 could benefit. Signed-off-by: Roman Zippel <zippel@linux-m68k.org> [akpm@linux-foundation.org: build fix] Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Ian Molton <spyro@f2s.com> Cc: Haavard Skinnemoen <hskinnemoen@atmel.com> Cc: Mikael Starvik <starvik@axis.com> Cc: David Howells <dhowells@redhat.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Roman Zippel <zippel@linux-m68k.org> Cc: Greg Ungerer <gerg@uclinux.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Kazumoto Kojima <kkojima@rr.iij4u.or.jp> Cc: Richard Curnow <rc@rc0.org.uk> Cc: William Lee Irwin III <wli@holomorphy.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Miles Bader <uclinux-v850@lsi.nec.co.jp> Cc: Andi Kleen <ak@muc.de> Cc: Chris Zankel <chris@zankel.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Add suspend-related notifications for CPU hotplugRafael J. Wysocki2007-05-094-0/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since nonboot CPUs are now disabled after tasks and devices have been frozen and the CPU hotplug infrastructure is used for this purpose, we need special CPU hotplug notifications that will help the CPU-hotplug-aware subsystems distinguish normal CPU hotplug events from CPU hotplug events related to a system-wide suspend or resume operation in progress. This patch introduces such notifications and causes them to be used during suspend and resume transitions. It also changes all of the CPU-hotplug-aware subsystems to take these notifications into consideration (for now they are handled in the same way as the corresponding "normal" ones). [oleg@tv-sign.ru: cleanups] Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Cc: Gautham R Shenoy <ego@in.ibm.com> Cc: Pavel Machek <pavel@ucw.cz> Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Add IRQF_IRQPOLL flag on IA64Bernhard Walle2007-05-081-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | Add IRQF_IRQPOLL for the timer interrupt on IA64. Signed-off-by: Bernhard Walle <bwalle@suse.de> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Kprobes: The ON/OFF knob thru debugfsAnanth N Mavinakayanahalli2007-05-081-0/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch provides a debugfs knob to turn kprobes on/off o A new file /debug/kprobes/enabled indicates if kprobes is enabled or not (default enabled) o Echoing 0 to this file will disarm all installed probes o Any new probe registration when disabled will register the probe but not arm it. A message will be printed out in such a case. o When a value 1 is echoed to the file, all probes (including ones registered in the intervening period) will be enabled o Unregistration will happen irrespective of whether probes are globally enabled or not. o Update Documentation/kprobes.txt to reflect these changes. While there also update the doc to make it current. We are also looking at providing sysrq key support to tie to the disabling feature provided by this patch. [akpm@linux-foundation.org: Use bool like a bool!] [akpm@linux-foundation.org: add printk facility levels] [cornelia.huck@de.ibm.com: Add the missing arch_trampoline_kprobe() for s390] Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Signed-off-by: Srinivasa DS <srinivasa@in.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | kprobes: kretprobes simplificationsChristoph Hellwig2007-05-081-14/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - consolidate duplicate code in all arch_prepare_kretprobe instances into common code - replace various odd helpers that use hlist_for_each_entry to get the first elemenet of a list with either a hlist_for_each_entry_save or an opencoded access to the first element in the caller - inline add_rp_inst into it's only remaining caller - use kretprobe_inst_table_head instead of opencoding it Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Prasanna S Panchamukhi <prasanna@in.ibm.com> Acked-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | EFI: warn only for pre-1.00 system tablesBjorn Helgaas2007-05-081-5/+5
| | | | | | | | | | | | | | | | | | | | | | | | We used to warn unless the EFI system table major revision was exactly 1. But EFI 2.00 firmware is starting to appear, and the 2.00 changes don't affect anything in Linux. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Cc: Andi Kleen <ak@suse.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>
* | Kprobes: print details of kretprobe on assertion failureAnanth N Mavinakayanahalli2007-05-081-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In certain cases like when the real return address can't be found or when the number of tracked calls to a kretprobed function is less than the number of returns, we may not be able to find the correct return address after processing a kretprobe. Currently we just do a BUG_ON, but no information is provided about the actual failing kretprobe. Print out details of the kretprobe before calling BUG(). Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Prasanna S Panchamukhi <prasanna@in.ibm.com> Cc: Jim Keniston <jkenisto@us.ibm.com> Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Cc: Maneesh Soni <maneesh@in.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | kdump/kexec: calculate note size at compile timeSimon Horman2007-05-081-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently the size of the per-cpu region reserved to save crash notes is set by the per-architecture value MAX_NOTE_BYTES. Which in turn is currently set to 1024 on all supported architectures. While testing ia64 I recently discovered that this value is in fact too small. The particular setup I was using actually needs 1172 bytes. This lead to very tedious failure mode where the tail of one elf note would overwrite the head of another if they ended up being alocated sequentially by kmalloc, which was often the case. It seems to me that a far better approach is to caclculate the size that the area needs to be. This patch does just that. If a simpler stop-gap patch for ia64 to be squeezed into 2.6.21(.X) is needed then this should be as easy as making MAX_NOTE_BYTES larger in arch/asm-ia64/kexec.h. Perhaps 2048 would be a good choice. However, I think that the approach in this patch is a much more robust idea. Acked-by: Vivek Goyal <vgoyal@in.ibm.com> Signed-off-by: Simon Horman <horms@verge.net.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | header cleaning: don't include smp_lock.h when not usedRandy Dunlap2007-05-0811-11/+0
| | | | | | | | | | | | | | | | | | | | | | | | Remove includes of <linux/smp_lock.h> where it is not used/needed. Suggested by Al Viro. Builds cleanly on x86_64, i386, alpha, ia64, powerpc, sparc, sparc64, and arm (all 59 defconfigs). Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | move die notifier handling to common codeChristoph Hellwig2007-05-085-21/+5
|/ | | | | | | | | | | | | | | | | | | | | | | This patch moves the die notifier handling to common code. Previous various architectures had exactly the same code for it. Note that the new code is compiled unconditionally, this should be understood as an appel to the other architecture maintainer to implement support for it aswell (aka sprinkling a notify_die or two in the proper place) arm had a notifiy_die that did something totally different, I renamed it to arm_notify_die as part of the patch and made it static to the file it's declared and used at. avr32 used to pass slightly less information through this interface and I brought it into line with the other architectures. [akpm@linux-foundation.org: build fix] [akpm@linux-foundation.org: fix vmalloc_sync_all bustage] [bryan.wu@analog.com: fix vmalloc_sync_all in nommu] Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: <linux-arch@vger.kernel.org> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Bryan Wu <bryan.wu@analog.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6Linus Torvalds2007-05-079-39/+385
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6: [IA64] update memory attribute aliasing documentation & test cases [IA64] fail mmaps that span areas with incompatible attributes [IA64] allow WB /sys/.../legacy_mem mmaps [IA64] make ioremap avoid unsupported attributes [IA64] rename ioremap variables to match i386 [IA64] relax per-cpu TLB requirement to DTC [IA64] remove per-cpu ia64_phys_stacked_size_p8 [IA64] Fix example error injection program [IA64] Itanium MC Error Injection Tool: pal_mc_error_inject() interface [IA64] Itanium MC Error Injection Tool: Makefile changes [IA64] Itanium MC Error Injection Tool: Driver sysfs interface [IA64] Itanium MC Error Injection Tool: Doc and sample application [IA64] Itanium MC Error Injection Tool: Kernel configuration
| * Pull mem-attribute into release branchTony Luck2007-04-301-3/+43
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| | * [IA64] fail mmaps that span areas with incompatible attributesBjorn Helgaas2007-03-301-3/+43
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Example memory map (from HP sx1000 with VGA enabled): 0x00000 - 0x9FFFF supports only WB (cacheable) access 0xA0000 - 0xBFFFF supports only UC (uncacheable) access 0xC0000 - 0xFFFFF supports only WB (cacheable) access Some versions of X map the entire 0x00000-0xFFFFF area at once. With the example above, this mmap must fail because there's no memory attribute that's safe for the entire area. Prior to this patch, we performed the mmap with a UC mapping. When X accessed the WB memory at 0xC0000, it caused an MCA. The crash can happen when mapping 0xC0000 from either /dev/mem or a /sys/.../legacy_mem file. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * | Pull percpu-dtc into release branchTony Luck2007-04-306-36/+48
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| | * | [IA64] relax per-cpu TLB requirement to DTCChen, Kenneth W2007-02-062-29/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Instead of pinning per-cpu TLB into a DTR, use DTC. This will free up one TLB entry for application, or even kernel if access pattern to per-cpu data area has high temporal locality. Since per-cpu is mapped at the top of region 7 address, we just need to add special case in alt_dtlb_miss. The physical address of per-cpu data is already conveniently stored in IA64_KR(PER_CPU_DATA). Latency for alt_dtlb_miss is not affected as we can hide all the latency. It was measured that alt_dtlb_miss handler has 23 cycles latency before and after the patch. The performance effect is massive for applications that put lots of tlb pressure on CPU. Workload environment like database online transaction processing or application uses tera-byte of memory would benefit the most. Measurement with industry standard database benchmark shown an upward of 1.6% gain. While smaller workloads like cpu, java also showing small improvement. Signed-off-by: Ken Chen <kenneth.w.chen@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| | * | [IA64] remove per-cpu ia64_phys_stacked_size_p8Chen, Kenneth W2007-02-064-7/+34
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It's not efficient to use a per-cpu variable just to store how many physical stack register a cpu has. Ever since the incarnation of ia64 up till upcoming Montecito processor, that variable has "glued" to 96. Having a variable in memory means that the kernel is burning an extra cacheline access on every syscall and kernel exit path. Such "static" value is better served with the instruction patching utility exists today. Convert ia64_phys_stacked_size_p8 into dynamic insn patching. This also has a pleasant side effect of eliminating access to per-cpu area while psr.ic=0 in the kernel exit path. (fixable for per-cpu DTC work, but why bother?) There are some concerns with the default value that the instruc- tion encoded in the kernel image. It shouldn't be concerned. The reasons are: (1) cpu_init() is called at CPU initialization. In there, we find out physical stack register size from PAL and patch two instructions in kernel exit code. The code in question can not be executed before the patching is done. (2) current implementation stores zero in ia64_phys_stacked_size_p8, and that's what the current kernel exit path loads the value with. With the new code, it is equivalent that we store reg size 96 in ia64_phys_stacked_size_p8, thus creating a better safety net. Given (1) above can never fail, having (2) is just a bonus. All in all, this patch allow one less memory reference in the kernel exit path, thus reducing syscall and interrupt return latency; and avoid polluting potential useful data in the CPU cache. Signed-off-by: Ken Chen <kenneth.w.chen@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * | | Pull error-inject into release branchTony Luck2007-04-302-0/+294
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| | * | | [IA64] Itanium MC Error Injection Tool: Makefile changesFenghua Yu2007-01-291-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch has Makefile changes. Signed-off-by: Fenghua Yu <fenghua.yu@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
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