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| * | | x86, apic: Remove early_init_lapic_mapping()Yinghai Lu2010-12-094-30/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It is almost the same as smp_register_lapic_addr(). We just need to let smp_read_mpc() call smp_register_lapic_addr() when early==1. Add the apic_printk to smp_register_lapic_address() Signed-off-by: Yinghai Lu <yinghai@kernel.org> Cc: Suresh Siddha <suresh.b.siddha@intel.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> LKML-Reference: <4CFDF681.3030509@kernel.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * | | x86, apic: Unify identical register_lapic_address() functionsYinghai Lu2010-12-094-27/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | They are the same, move the common function to apic.c to allow further cleanups. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Cc: Suresh Siddha <suresh.b.siddha@intel.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Len Brown <lenb@kernel.org> LKML-Reference: <4CFDF675.4060305@kernel.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * | | Merge branch 'x86/platform' into x86/apic-cleanupsThomas Gleixner2010-12-0928-18/+1934
| |\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | Reason: apic cleanup series depends on x86/apic, x86/amd-nb and x86/platform Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * \ \ \ Merge branch 'x86/amd-nb' into x86/apic-cleanupsThomas Gleixner2010-12-098933-529226/+974902
| |\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Reason: apic cleanup series depends on x86/apic, x86/amd-nb x86/platform Conflicts: arch/x86/include/asm/io_apic.h Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* | \ \ \ \ Merge branch 'mce-for-linus' of ↵Linus Torvalds2011-01-074-118/+359
|\ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp * 'mce-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp: EDAC, MCE: Fix NB error formatting EDAC, MCE: Use BIT_64() to eliminate warnings on 32-bit EDAC, MCE: Enable MCE decoding on F15h EDAC, MCE: Allow F15h bank 6 MCE injection EDAC, MCE: Shorten error report formatting EDAC, MCE: Overhaul error fields extraction macros EDAC, MCE: Add F15h FP MCE decoder EDAC, MCE: Add F15 EX MCE decoder EDAC, MCE: Add an F15h NB MCE decoder EDAC, MCE: No F15h LS MCE decoder EDAC, MCE: Add F15h CU MCE decoder EDAC, MCE: Add F15h IC MCE decoder EDAC, MCE: Add F15h DC MCE decoder EDAC, MCE: Select extended error code mask
| * | | | | | EDAC, MCE: Fix NB error formattingBorislav Petkov2011-01-071-7/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Minor formatting fixup since the information which core was associated with the MCE is not always valid. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
| * | | | | | EDAC, MCE: Use BIT_64() to eliminate warnings on 32-bitRandy Dunlap2011-01-071-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Building for X86_32 produces shift count warnings, so use BIT_64() to eliminate the warnings. drivers/edac/mce_amd.c:778: warning: left shift count >= width of type drivers/edac/mce_amd.c:778: warning: left shift count >= width of type Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Cc: Doug Thompson <dougthompson@xmission.com> Cc: bluesmoke-devel@lists.sourceforge.net Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
| * | | | | | EDAC, MCE: Enable MCE decoding on F15hBorislav Petkov2011-01-071-6/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that everything is inplace, enable MCE decoding on F15h. Make initcall routine a bit more readable. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
| * | | | | | EDAC, MCE: Allow F15h bank 6 MCE injectionBorislav Petkov2011-01-071-4/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | F15h adds a sixth MCE bank: adjust bank number check in the injection code. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
| * | | | | | EDAC, MCE: Shorten error report formattingBorislav Petkov2011-01-071-22/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Shorten up MCi_STATUS flags and add BD's new deferred and poison types. Also, simplify formatting. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
| * | | | | | EDAC, MCE: Overhaul error fields extraction macrosBorislav Petkov2011-01-073-54/+43
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make macro names shorter thus making code shorter and more clear. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
| * | | | | | EDAC, MCE: Add F15h FP MCE decoderBorislav Petkov2011-01-071-0/+44
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add decoder for FP MCEs. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
| * | | | | | EDAC, MCE: Add F15 EX MCE decoderBorislav Petkov2011-01-071-7/+34
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Integrate the single FIROB signature into an expanded table along with the new BD MCE types. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
| * | | | | | EDAC, MCE: Add an F15h NB MCE decoderBorislav Petkov2011-01-071-0/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | by (almost) reusing the F10h one since the signatures are the same. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
| * | | | | | EDAC, MCE: No F15h LS MCE decoderBorislav Petkov2011-01-071-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | F15h BD doesn't generate LS MCEs so warn about it. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
| * | | | | | EDAC, MCE: Add F15h CU MCE decoderBorislav Petkov2011-01-071-1/+61
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | MCE bank 2 is redefined from a BU to a CU (Combined Unit) bank on F15h. Add a decoder function for CU MCEs. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
| * | | | | | EDAC, MCE: Add F15h IC MCE decoderBorislav Petkov2011-01-072-4/+51
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add support for decoding F15h IC MCEs. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
| * | | | | | EDAC, MCE: Add F15h DC MCE decoderBorislav Petkov2011-01-072-19/+62
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a decoder for F15h DC MCEs to support the new types of DC MCEs introduced by the BD microarchitecture. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
| * | | | | | EDAC, MCE: Select extended error code maskBorislav Petkov2011-01-071-4/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | F15h enlarges the extended error code of an MCE to a 5-bit field (MCi_STATUS[20:16]). Add a mask variable which default 0xf is overridden on F15h. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
* | | | | | | Merge branch 'edac-for-linus' of ↵Linus Torvalds2011-01-0710-598/+436
|\ \ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp * 'edac-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp: amd64_edac: Disable DRAM ECC injection on K8 EDAC: Fixup scrubrate manipulation amd64_edac: Remove two-stage initialization amd64_edac: Check ECC capabilities initially amd64_edac: Carve out ECC-related hw settings amd64_edac: Remove PCI ECS enabling functions amd64_edac: Remove explicit Kconfig PCI dependency amd64_edac: Allocate driver instances dynamically amd64_edac: Rework printk macros amd64_edac: Rename CPU PCI devices amd64_edac: Concentrate per-family init even more amd64_edac: Cleanup the CPU PCI device reservation amd64_edac: Simplify CPU family detection amd64_edac: Add per-family init function amd64_edac: Use cached extended CPU model amd64_edac: Remove F11h support
| * | | | | | | amd64_edac: Disable DRAM ECC injection on K8Borislav Petkov2011-01-071-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | K8 does not allow for an atomic RMW to a cacheline as F10h does so disable the error injection interface for it. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
| * | | | | | | EDAC: Fixup scrubrate manipulationBorislav Petkov2011-01-077-63/+52
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make the ->{get|set}_sdram_scrub_rate return the actual scrub rate bandwidth it succeeded setting and remove superfluous arg pointer used for that. A negative value returned still means that an error occurred while setting the scrubrate. Document this for future reference. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
| * | | | | | | amd64_edac: Remove two-stage initializationBorislav Petkov2011-01-071-100/+68
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that all prerequisites are in place, drop the two-stage driver instances initialization in favor of the following simple init sequence: 1. Probe PCI device: we only test ECC capabilities here and if none exit early. 2. If the hw supports ECC and it is/can be enabled, we init the per-node instance. Remove "amd64_" prefix from static functions touched, while at it. There actually should be no visible functional change resulting from this patch. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
| * | | | | | | amd64_edac: Check ECC capabilities initiallyBorislav Petkov2011-01-071-66/+75
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rework the code to check the hardware ECC capabilities at PCI probing time. We do all further initialization only if we actually can/have ECC enabled. While at it: 0. Fix function naming. 1. Simplify/clarify debug output. 2. Remove amd64_ prefix from the static functions 3. Reorganize code. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
| * | | | | | | amd64_edac: Carve out ECC-related hw settingsBorislav Petkov2011-01-072-24/+49
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is in preparation for the init path reorganization where we want only to 1) test whether a particular node supports ECC 2) can it be enabled and only then do the necessary allocation/initialization. For that, we need to decouple the ECC settings of the node from the instance's descriptor. The should be no functional change introduced by this patch. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
| * | | | | | | amd64_edac: Remove PCI ECS enabling functionsBorislav Petkov2011-01-072-59/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | PCI ECS is being enabled by default since 2.6.26 on AMD so this code is just superfluous now, remove it. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
| * | | | | | | amd64_edac: Remove explicit Kconfig PCI dependencyBorislav Petkov2011-01-071-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | AMD_NB pulls in the dependency on PCI. Clarify/fix help text while at it. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
| * | | | | | | amd64_edac: Allocate driver instances dynamicallyBorislav Petkov2011-01-072-18/+29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Remove static allocation in favor of dynamically allocating space for as many driver instances as northbridges present on the system. There should be no functional change resulting from this patch. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
| * | | | | | | amd64_edac: Rework printk macrosBorislav Petkov2011-01-075-107/+87
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a macro per printk level, shorten up error messages. Add relevant information to KERN_INFO level. No functional change. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
| * | | | | | | amd64_edac: Rename CPU PCI devicesBorislav Petkov2011-01-073-95/+77
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rename variables representing PCI devices to their BKDG names for faster search and shorter, clearer code. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
| * | | | | | | amd64_edac: Concentrate per-family init even moreBorislav Petkov2011-01-072-29/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Move the remaining per-family init code into the proper place and simplify the rest of the initialization. Reorganize error handling in amd64_init_one_instance(). Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
| * | | | | | | amd64_edac: Cleanup the CPU PCI device reservationBorislav Petkov2011-01-071-30/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Shorten code and clarify comments, return proper -E* values on error. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
| * | | | | | | amd64_edac: Simplify CPU family detectionBorislav Petkov2011-01-072-32/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Concentrate CPU family detection in the per-family init function. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
| * | | | | | | amd64_edac: Add per-family init functionBorislav Petkov2011-01-072-19/+28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Run a per-family init function which does all the settings based on the family this driver instance is running on. Move the scrubrate calculation in it and simplify code. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
| * | | | | | | amd64_edac: Use cached extended CPU modelBorislav Petkov2011-01-071-3/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ... instead of computing it needlessly again. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
| * | | | | | | amd64_edac: Remove F11h supportBorislav Petkov2011-01-072-49/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | F11h doesn't support DRAM ECC so whack it away. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
* | | | | | | | Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6Linus Torvalds2011-01-0795-1800/+2992
|\ \ \ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6: (65 commits) [S390] prevent unneccesary loops_per_jiffy recalculation [S390] cpuinfo: use get_online_cpus() instead of preempt_disable() [S390] smp: remove cpu hotplug messages [S390] mutex: enable spinning mutex on s390 [S390] mutex: Introduce arch_mutex_cpu_relax() [S390] cio: fix ccwgroup unregistration race condition [S390] perf: add DWARF register lookup for s390 [S390] cleanup ftrace backend functions [S390] ptrace cleanup [S390] smp/idle: call init_idle() before starting a new cpu [S390] smp: delay idle task creation [S390] dasd: Correct retry counter for terminated I/O. [S390] dasd: Add support for raw ECKD access. [S390] dasd: Prevent deadlock during suspend/resume. [S390] dasd: Improve handling of stolen DASD reservation [S390] dasd: do path verification for paths added at runtime [S390] dasd: add High Performance FICON multitrack support [S390] cio: reduce memory consumption of itcw structures [S390] nmi: enable machine checks early [S390] qeth: buffer count imbalance ...
| * | | | | | | | [S390] prevent unneccesary loops_per_jiffy recalculationHeiko Carstens2011-01-052-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When the seqfile /proc/cpuinfo gets accesses for each possible cpu loops_per_jiffy gets recalculated. However its value is only needed on first access. In addition loops_per_jiffy should be recalculated when the machine reports a capability change. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | | | | | [S390] cpuinfo: use get_online_cpus() instead of preempt_disable()Heiko Carstens2011-01-051-4/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use get_online_cpus() instead of preempt_disable() to make sure cpus don't go offline while accessing their per cpu data. The preempt_disable() stuff is old code which was used before get_online_cpus() was available. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | | | | | [S390] smp: remove cpu hotplug messagesHeiko Carstens2011-01-053-16/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Get rid of messages that indicate if a cpu went online or offline. There is nothing special about this anymore and these messages might flood the kernel log buffer which makes debugging harder since more important messages might be overwritten. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | | | | | [S390] mutex: enable spinning mutex on s390Gerald Schaefer2011-01-051-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This enables the spinning mutex feature on s390 by removing HAVE_DEFAULT_NO_SPIN_MUTEXES from arch/s390/Kconfig. Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | | | | | [S390] mutex: Introduce arch_mutex_cpu_relax()Gerald Schaefer2011-01-056-2/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The spinning mutex implementation uses cpu_relax() in busy loops as a compiler barrier. Depending on the architecture, cpu_relax() may do more than needed in this specific mutex spin loops. On System z we also give up the time slice of the virtual cpu in cpu_relax(), which prevents effective spinning on the mutex. This patch replaces cpu_relax() in the spinning mutex code with arch_mutex_cpu_relax(), which can be defined by each architecture that selects HAVE_ARCH_MUTEX_CPU_RELAX. The default is still cpu_relax(), so this patch should not affect other architectures than System z for now. Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1290437256.7455.4.camel@thinkpad> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | | | | | [S390] cio: fix ccwgroup unregistration race conditionPeter Oberparleiter2011-01-051-38/+40
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A race condition exists in the ccwgroup device unregistration code which can cause a kernel panic due to a use-after-free bug. This race condition might be triggered when all ccw devices associated with a ccwgroup device are removed at the same time (e.g. because the corresponding channel path becomes no longer available). Fix this race condition by clearing the references from the associated ccw devices to the ccw group device during unregistration of the ccw group device. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | | | | | [S390] perf: add DWARF register lookup for s390Heiko Carstens2011-01-052-0/+26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | | | | | [S390] cleanup ftrace backend functionsMartin Schwidefsky2011-01-054-171/+135
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | | | | | [S390] ptrace cleanupMartin Schwidefsky2011-01-0515-263/+347
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Overhaul program event recording and the code dealing with the ptrace user space interface. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | | | | | [S390] smp/idle: call init_idle() before starting a new cpuHeiko Carstens2011-01-053-7/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Call init_idle() which (re-)initializes the idle task structure before it gets used on a new cpu. That way we can also get rid of the odd preempt_enable_no_resched() call we have in the cpu offline path within cpu_idle(). That call prevented preempt count imbalances between cpu hotplug operations. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | | | | | [S390] smp: delay idle task creationHeiko Carstens2011-01-051-15/+26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Delay idle task creation until a cpu gets set online instead of creating them for all possible cpus at system startup. For one cpu system this should safe more than 1 MB. On my debug system with lots of debug stuff enabled this saves 2 MB. Same as on x86. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | | | | | [S390] dasd: Correct retry counter for terminated I/O.Stefan Haberland2011-01-051-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In case the DASD driver needs to term a running I/O the retry counter is decreased twice. Remove the unnecessary retry counter decrease in das_term_IO. Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | | | | | [S390] dasd: Add support for raw ECKD access.Stefan Haberland2011-01-055-8/+268
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Normal I/O operations through the DASD device driver give only access to the data fields of an ECKD device even for track based I/O. This patch extends the DASD device driver to give access to whole ECKD tracks including count, key and data fields. Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>