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2009-12-09Merge commit 'gcl/next' into nextBenjamin Herrenschmidt
2009-12-09powerpc/pseries: Serialize cpu hotplug operations during deactivate Vs ↵Gautham R Shenoy
deallocate Currently the cpu-allocation/deallocation process comprises of two steps: - Set the indicators and to update the device tree with DLPAR node information. - Online/offline the allocated/deallocated CPU. This is achieved by writing to the sysfs tunables "probe" during allocation and "release" during deallocation. At the sametime, the userspace can independently online/offline the CPUs of the system using the sysfs tunable "online". It is quite possible that when a userspace tool offlines a CPU for the purpose of deallocation and is in the process of updating the device tree, some other userspace tool could bring the CPU back online by writing to the "online" sysfs tunable thereby causing the deallocate process to fail. The solution to this is to serialize writes to the "probe/release" sysfs tunable with the writes to the "online" sysfs tunable. This patch employs a mutex to provide this serialization, which is a no-op on all architectures except PPC_PSERIES Signed-off-by: Gautham R Shenoy <ego@in.ibm.com> Acked-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-12-09pseries/pseries: Add code to online/offline CPUs of a DLPAR nodeGautham R Shenoy
Currently the cpu-allocation/deallocation on pSeries is a two step process from the Userspace. - Set the indicators and update the device tree by writing to the sysfs tunable "probe" during allocation and "release" during deallocation. - Online / Offline the CPUs of the allocated/would_be_deallocated node by writing to the sysfs tunable "online". This patch adds kernel code to online/offline the CPUs soon_after/just_before they have been allocated/would_be_deallocated. This way, the userspace tool that performs DLPAR operations would only have to deal with one set of sysfs tunables namely "probe" and release". Signed-off-by: Gautham R Shenoy <ego@in.ibm.com> Signed-off-by: Nathan Fontenot <nfont@austin.ibm.com> Acked-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-12-09powerpc: stop_this_cpu: remove the cpu from the online map.Valentine Barshak
Remove the CPU from the online map to prevent smp_call_function from sending messages to a stopped CPU. Signed-off-by: Valentine Barshak <vbarshak@ru.mvista.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-12-09powerpc/pseries: Add kernel based CPU DLPAR handlingNathan Fontenot
This patch adds the specific routines to probe and release (add and remove) cpu resource for the powerpc pseries platform and registers these handlers with the ppc_md callout structure. Signed-off-by: Nathan Fontenot <nfont@austin.ibm.com> Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-12-09sysfs/cpu: Add probe/release filesNathan Fontenot
Version 3 of this patch is updated with documentation added to Documentation/ABI. There are no changes to any of the C code from v2 of the patch. In order to support kernel DLPAR of CPU resources we need to provide an interface to add (probe) and remove (release) the resource from the system. This patch Creates new generic probe and release sysfs files to facilitate cpu probe/release. The probe/release interface provides for allowing each arch to supply their own routines for implementing the backend of adding and removing cpus to/from the system. This also creates the powerpc specific stubs to handle the arch callouts from writes to the sysfs files. The creation and use of these files is regulated by the CONFIG_ARCH_CPU_PROBE_RELEASE option so that only architectures that need the capability will have the files created. Signed-off-by: Nathan Fontenot <nfont@austin.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-12-09powerpc/pseries: Kernel DLPAR InfrastructureNathan Fontenot
The Dynamic Logical Partitioning capabilities of the powerpc pseries platform allows for the addition and removal of resources (i.e. CPU's, memory, and PCI devices) from a partition. The removal of a resource involves removing the resource's node from the device tree and then returning the resource to firmware via the rtas set-indicator call. To add a resource, it is first obtained from firmware via the rtas set-indicator call and then a new device tree node is created using the ibm,configure-coinnector rtas call and added to the device tree. This patch provides the kernel DLPAR infrastructure in a new filed named dlpar.c. The functionality provided is for acquiring and releasing a resource from firmware and the parsing of information returned from the ibm,configure-connector rtas call. Additionally this exports the pSeries reconfiguration notifier chain so that it can be invoked when device tree updates are made. Signed-off-by: Nathan Fontenot <nfont@austin.ibm.com> Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-12-09powerpc/macio: Rework hotplug media bay supportBenjamin Herrenschmidt
The hotplug mediabay has tendrils deep into drivers/ide code which makes a libata port reather difficult. In addition it's ugly and could be done better. This reworks the interface between the mediabay and the rest of the world so that: - Any macio_driver can now have a mediabay_event callback which will be called when that driver sits on a mediabay and it's been either plugged or unplugged. The device type is passed as an argument. We can now move all the IDE cruft into the IDE driver itself - A check_media_bay() function can be used to take a peek at the type of device currently in the bay if any, a cleaner variant of the previous function with the same name. - A pair of lock/unlock functions are exposed to allow the IDE driver to block the hotplug callbacks during the initial setup and probing of the bay in order to avoid nasty race conditions. - The mediabay code no longer needs to spin on the status register of the IDE interface when it detects an IDE device, this is done just fine by the IDE code itself Overall, less code, simpler, and allows for another driver than our old drivers/ide based one. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-12-08Merge branch 'timers-for-linus-urgent' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'timers-for-linus-urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: hrtimer: Fix /proc/timer_list regression itimers: Fix racy writes to cpu_itimer fields timekeeping: Fix clock_gettime vsyscall time warp
2009-12-08Merge branch 'timers-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: timers, init: Limit the number of per cpu calibration bootup messages posix-cpu-timers: optimize and document timer_create callback clockevents: Add missing include to pacify sparse x86: vmiclock: Fix printk format x86: Fix printk format due to variable type change sparc: fix printk for change of variable type clocksource/events: Fix fallout of generic code changes nohz: Allow 32-bit machines to sleep for more than 2.15 seconds nohz: Track last do_timer() cpu nohz: Prevent clocksource wrapping during idle nohz: Type cast printk argument mips: Use generic mult/shift factor calculation for clocks clocksource: Provide a generic mult/shift factor calculation clockevents: Use u32 for mult and shift factors nohz: Introduce arch_needs_cpu nohz: Reuse ktime in sub-functions of tick_check_idle. time: Remove xtime_cache time: Implement logarithmic time accumulation
2009-12-08Merge branch 'for-2.6.33' of git://git.kernel.dk/linux-2.6-blockLinus Torvalds
* 'for-2.6.33' of git://git.kernel.dk/linux-2.6-block: (113 commits) cfq-iosched: Do not access cfqq after freeing it block: include linux/err.h to use ERR_PTR cfq-iosched: use call_rcu() instead of doing grace period stall on queue exit blkio: Allow CFQ group IO scheduling even when CFQ is a module blkio: Implement dynamic io controlling policy registration blkio: Export some symbols from blkio as its user CFQ can be a module block: Fix io_context leak after failure of clone with CLONE_IO block: Fix io_context leak after clone with CLONE_IO cfq-iosched: make nonrot check logic consistent io controller: quick fix for blk-cgroup and modular CFQ cfq-iosched: move IO controller declerations to a header file cfq-iosched: fix compile problem with !CONFIG_CGROUP blkio: Documentation blkio: Wait on sync-noidle queue even if rq_noidle = 1 blkio: Implement group_isolation tunable blkio: Determine async workload length based on total number of queues blkio: Wait for cfq queue to get backlogged if group is empty blkio: Propagate cgroup weight updation to cfq groups blkio: Drop the reference to queue once the task changes cgroup blkio: Provide some isolation between groups ...
2009-12-08Merge branch 'i2c-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging * 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging: i2c-stub: Documentation update i2c-stub: Allow user to disable some commands i2c-stub: Implement I2C block support i2c: Refactor for_each callbacks i2c-i801: Retry on lost arbitration i2c: Remove big kernel lock from i2cdev_open ics932s401: Clean up detect function i2c: Simplify i2c_detect_address i2c: Drop probe, ignore and force module parameters i2c: Add missing __devinit markers to old i2c adapter drivers i2c: Bus drivers don't have to support I2C_M_REV_DIR_ADDR i2c: Prevent priority inversion on top of bus lock i2c-voodoo3: Delete i2c-powermac: Drop temporary name buffer i2c-powermac: Include the i2c_adapter in struct pmac_i2c_bus i2c-powermac: Log errors i2c-powermac: Refactor i2c_powermac_smbus_xfer i2c-powermac: Reject unsupported I2C transactions i2c/chips: Move ds1682 to drivers/misc
2009-12-08Merge branch 'kvm-updates/2.6.33' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds
* 'kvm-updates/2.6.33' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (84 commits) KVM: VMX: Fix comparison of guest efer with stale host value KVM: s390: Fix prefix register checking in arch/s390/kvm/sigp.c KVM: Drop user return notifier when disabling virtualization on a cpu KVM: VMX: Disable unrestricted guest when EPT disabled KVM: x86 emulator: limit instructions to 15 bytes KVM: s390: Make psw available on all exits, not just a subset KVM: x86: Add KVM_GET/SET_VCPU_EVENTS KVM: VMX: Report unexpected simultaneous exceptions as internal errors KVM: Allow internal errors reported to userspace to carry extra data KVM: Reorder IOCTLs in main kvm.h KVM: x86: Polish exception injection via KVM_SET_GUEST_DEBUG KVM: only clear irq_source_id if irqchip is present KVM: x86: disallow KVM_{SET,GET}_LAPIC without allocated in-kernel lapic KVM: x86: disallow multiple KVM_CREATE_IRQCHIP KVM: VMX: Remove vmx->msr_offset_efer KVM: MMU: update invlpg handler comment KVM: VMX: move CR3/PDPTR update to vmx_set_cr3 KVM: remove duplicated task_switch check KVM: powerpc: Fix BUILD_BUG_ON condition KVM: VMX: Use shared msr infrastructure ... Trivial conflicts due to new Kconfig options in arch/Kconfig and kernel/Makefile
2009-12-08Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6: (1815 commits) mac80211: fix reorder buffer release iwmc3200wifi: Enable wimax core through module parameter iwmc3200wifi: Add wifi-wimax coexistence mode as a module parameter iwmc3200wifi: Coex table command does not expect a response iwmc3200wifi: Update wiwi priority table iwlwifi: driver version track kernel version iwlwifi: indicate uCode type when fail dump error/event log iwl3945: remove duplicated event logging code b43: fix two warnings ipw2100: fix rebooting hang with driver loaded cfg80211: indent regulatory messages with spaces iwmc3200wifi: fix NULL pointer dereference in pmkid update mac80211: Fix TX status reporting for injected data frames ath9k: enable 2GHz band only if the device supports it airo: Fix integer overflow warning rt2x00: Fix padding bug on L2PAD devices. WE: Fix set events not propagated b43legacy: avoid PPC fault during resume b43: avoid PPC fault during resume tcp: fix a timewait refcnt race ... Fix up conflicts due to sysctl cleanups (dead sysctl_check code and CTL_UNNUMBERED removed) in kernel/sysctl_check.c net/ipv4/sysctl_net_ipv4.c net/ipv6/addrconf.c net/sctp/sysctl.c
2009-12-08Merge branch 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6Linus Torvalds
* 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6: of: merge of_find_all_nodes() implementations of: merge other miscellaneous prototypes of: merge of_*_flat_dt*() functions of: merge of_node_get(), of_node_put() and of_find_all_nodes() of: merge of_read_number() an of_read_ulong() of: merge of_node_*_flag() and set_node_proc_entry() of: merge struct boot_param_header from Microblaze and PowerPC of: add common header for flattened device tree representation of: Move OF_IS_DYNAMIC and OF_MARK_DYNAMIC macros to of.h of: merge struct device_node of: merge phandle, ihandle and struct property of: Rework linux/of.h and asm/prom.h include ordering
2009-12-08Merge git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/sysctl-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/sysctl-2.6: (43 commits) security/tomoyo: Remove now unnecessary handling of security_sysctl. security/tomoyo: Add a special case to handle accesses through the internal proc mount. sysctl: Drop & in front of every proc_handler. sysctl: Remove CTL_NONE and CTL_UNNUMBERED sysctl: kill dead ctl_handler definitions. sysctl: Remove the last of the generic binary sysctl support sysctl net: Remove unused binary sysctl code sysctl security/tomoyo: Don't look at ctl_name sysctl arm: Remove binary sysctl support sysctl x86: Remove dead binary sysctl support sysctl sh: Remove dead binary sysctl support sysctl powerpc: Remove dead binary sysctl support sysctl ia64: Remove dead binary sysctl support sysctl s390: Remove dead sysctl binary support sysctl frv: Remove dead binary sysctl support sysctl mips/lasat: Remove dead binary sysctl support sysctl drivers: Remove dead binary sysctl support sysctl crypto: Remove dead binary sysctl support sysctl security/keys: Remove dead binary sysctl support sysctl kernel: Remove binary sysctl logic ...
2009-12-08powerpc/macio: Add dma_parms support to macioBenjamin Herrenschmidt
This adds dma_parms to macio devices and initializes them with default values. This will allow pata_macio to setup the appropriate max segment size for the block layer. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-12-08powerpc/macio: Add devres support to macio_deviceBenjamin Herrenschmidt
This adds some basic devres support. When enabled via macio_enable_devres() resources requested by drivers will be automatically released. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-12-08powerpc/kvm: Sync guest visible MMU stateAlexander Graf
Currently userspace has no chance to find out which virtual address space we're in and resolve addresses. While that is a big problem for migration, it's also unpleasent when debugging, as gdb and the monitor don't work on virtual addresses. This patch exports enough of the MMU segment state to userspace to make debugging work and thus also includes the groundwork for migration. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-12-08powerpc/mm: Fix pgtable cache cleanup with CONFIG_PPC_SUBPAGE_PROTDavid Gibson
Commit a0668cdc154e54bf0c85182e0535eea237d53146 cleans up the handling of kmem_caches for allocating various levels of pagetables. Unfortunately, it conflicts badly with CONFIG_PPC_SUBPAGE_PROT, due to the latter's cleverly hidden technique of adding some extra allocation space to the top level page directory to store the extra information it needs. Since that extra allocation really doesn't fit into the cleaned up page directory allocating scheme, this patch alters CONFIG_PPC_SUBPAGE_PROT to instead allocate its struct subpage_prot_table as part of the mm_context_t. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-12-07Merge branch 'for-next' into for-linusJiri Kosina
Conflicts: kernel/irq/chip.c
2009-12-06i2c-powermac: Include the i2c_adapter in struct pmac_i2c_busJean Delvare
Include the i2c_adapter in struct pmac_i2c_bus. This avoids memory fragmentation and allows for several code cleanups. Signed-off-by: Jean Delvare <khali@linux-fr.org> Tested-by: Michel Daenzer <michel@daenzer.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-12-05Merge branch 'perf-core-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (470 commits) x86: Fix comments of register/stack access functions perf tools: Replace %m with %a in sscanf hw-breakpoints: Keep track of user disabled breakpoints tracing/syscalls: Make syscall events print callbacks static tracing: Add DEFINE_EVENT(), DEFINE_SINGLE_EVENT() support to docbook perf: Don't free perf_mmap_data until work has been done perf_event: Fix compile error perf tools: Fix _GNU_SOURCE macro related strndup() build error trace_syscalls: Remove unused syscall_name_to_nr() trace_syscalls: Simplify syscall profile trace_syscalls: Remove duplicate init_enter_##sname() trace_syscalls: Add syscall_nr field to struct syscall_metadata trace_syscalls: Remove enter_id exit_id trace_syscalls: Set event_enter_##sname->data to its metadata trace_syscalls: Remove unused event_syscall_enter and event_syscall_exit perf_event: Initialize data.period in perf_swevent_hrtimer() perf probe: Simplify event naming perf probe: Add --list option for listing current probe events perf probe: Add argv_split() from lib/argv_split.c perf probe: Move probe event utility functions to probe-event.c ...
2009-12-05Merge branch 'master' of /home/davem/src/GIT/linux-2.6/David S. Miller
Conflicts: drivers/net/pcmcia/fmvj18x_cs.c drivers/net/pcmcia/nmclan_cs.c drivers/net/pcmcia/xirc2ps_cs.c drivers/net/wireless/ray_cs.c
2009-12-05Merge branch 'core-iommu-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'core-iommu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (63 commits) x86, Calgary IOMMU quirk: Find nearest matching Calgary while walking up the PCI tree x86/amd-iommu: Remove amd_iommu_pd_table x86/amd-iommu: Move reset_iommu_command_buffer out of locked code x86/amd-iommu: Cleanup DTE flushing code x86/amd-iommu: Introduce iommu_flush_device() function x86/amd-iommu: Cleanup attach/detach_device code x86/amd-iommu: Keep devices per domain in a list x86/amd-iommu: Add device bind reference counting x86/amd-iommu: Use dev->arch->iommu to store iommu related information x86/amd-iommu: Remove support for domain sharing x86/amd-iommu: Rearrange dma_ops related functions x86/amd-iommu: Move some pte allocation functions in the right section x86/amd-iommu: Remove iommu parameter from dma_ops_domain_alloc x86/amd-iommu: Use get_device_id and check_device where appropriate x86/amd-iommu: Move find_protection_domain to helper functions x86/amd-iommu: Simplify get_device_resources() x86/amd-iommu: Let domain_for_device handle aliases x86/amd-iommu: Remove iommu specific handling from dma_ops path x86/amd-iommu: Remove iommu parameter from __(un)map_single x86/amd-iommu: Make alloc_new_range aware of multiple IOMMUs ...
2009-12-04tree-wide: fix assorted typos all over the placeAndré Goddard Rosa
That is "success", "unknown", "through", "performance", "[re|un]mapping" , "access", "default", "reasonable", "[con]currently", "temperature" , "channel", "[un]used", "application", "example","hierarchy", "therefore" , "[over|under]flow", "contiguous", "threshold", "enough" and others. Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2009-12-04powerpc/44x: Fix PCI node in Yosemite DTSCurtis Wald
The stanza for PCI was copied from Bamboo which has four PCI slots. Yosemite only has one PCI slot which is mapped to IDSEL 12, ADDR 22, IRQ2 Vector 25, INTA. Signed-off-by: Curtis Wald <cwald@watchguardvideo.com> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
2009-12-04powerpc/44x: Fix DMA ranges in DTS file for Katmai board.pbathija@amcc.com
Set PCI-E node inbound DMA ranges size to 4GB for correct boot up of Katmai. Signed-off-by: Pravin Bathija <pbathija@amcc.com> Acked-by: Feng Kan <fkan@amcc.com> Acked-by: Prodyut Hazarika <phazarika@amcc.com> Acked-by: Loc Ho <lho@amcc.com> Acked-by: Tirumala Reddy Marri <tmarri@amcc.com> Acked-by: Victor Gallardo <vgallardo@amcc.com> Acked-by: Stefan Roese <sr@denx.de> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
2009-12-03Merge branch 'master' into for-2.6.33Jens Axboe
2009-12-03KVM: powerpc: Fix BUILD_BUG_ON conditionHollis Blanchard
The old BUILD_BUG_ON implementation didn't work with __builtin_constant_p(). Fixing that revealed this test had been inverted for a long time without anybody noticing... Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2009-12-03KVM: Activate Virtualization On DemandAlexander Graf
X86 CPUs need to have some magic happening to enable the virtualization extensions on them. This magic can result in unpleasant results for users, like blocking other VMMs from working (vmx) or using invalid TLB entries (svm). Currently KVM activates virtualization when the respective kernel module is loaded. This blocks us from autoloading KVM modules without breaking other VMMs. To circumvent this problem at least a bit, this patch introduces on demand activation of virtualization. This means, that instead virtualization is enabled on creation of the first virtual machine and disabled on destruction of the last one. So using this, KVM can be easily autoloaded, while keeping other hypervisors usable. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2009-12-03KVM: Return -ENOTTY on unrecognized ioctlsAvi Kivity
Not the incorrect -EINVAL. Signed-off-by: Avi Kivity <avi@redhat.com>
2009-12-01Merge branch 'master' of ↵David S. Miller
master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: net/mac80211/ht.c
2009-12-02Revert "powerpc/mm: Fix bug in pagetable cache cleanup with ↵Benjamin Herrenschmidt
CONFIG_PPC_SUBPAGE_PROT" This reverts commit c045256d146800ea1d741a8e9e377dada6b7e195. It breaks build when CONFIG_PPC_SUBPAGE_PROT is not set. I will commit a fixed version separately Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-12-01powerpc: Fix DEBUG_HIGHMEM build break from d4515646699Becky Bruce
Code was added to mm/higmem.c that depends on several kmap types that powerpc does not support. We add dummy invalid definitions for KM_NMI, KM_NM_PTE, and KM_IRQ_PTE. According to list discussion, this fix should not be needed anymore starting with 2.6.33. The code is commented to this effect so hopefully we will remember to remove this. Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-11-27powerpc/mm: Fix bug in gup_hugepd()David Gibson
Commit a4fe3ce7699bfe1bd88f816b55d42d8fe1dac655 introduced a new get_user_pages() path for hugepages on powerpc. Unfortunately, there is a bug in it's loop logic, which can cause it to overrun the end of the intended region. This came about by copying the logic from the normal page path, which assumes the address and end parameters have been pagesize aligned at the top-level. Since they're not *hugepage* size aligned, the simplistic logic could step over the end of the gup region without triggering the loop end condition. This patch fixes the bug by using the technique that the normal page path uses in levels above the lowest to truncate the ending address to something we know we'll match with. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-11-27powerpc/mm: Fix bug in pagetable cache cleanup with CONFIG_PPC_SUBPAGE_PROTDavid Gibson
Commit a0668cdc154e54bf0c85182e0535eea237d53146 cleans up the handling of kmem_caches for allocating various levels of pagetables. Unfortunately, it conflicts badly with CONFIG_PPC_SUBPAGE_PROT, due to the latter's cleverly hidden technique of adding some extra allocation space to the top level page directory to store the extra information it needs. Since that extra allocation really doesn't fit into the cleaned up page directory allocating scheme, this patch alters CONFIG_PPC_SUBPAGE_PROT to instead allocate its struct subpage_prot_table as part of the mm_context_t. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-11-26block: add helpers to run flush_dcache_page() against a bio and a request's ↵Ilya Loginov
pages Mtdblock driver doesn't call flush_dcache_page for pages in request. So, this causes problems on architectures where the icache doesn't fill from the dcache or with dcache aliases. The patch fixes this. The ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE symbol was introduced to avoid pointless empty cache-thrashing loops on architectures for which flush_dcache_page() is a no-op. Every architecture was provided with this flush pages on architectires where ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE is equal 1 or do nothing otherwise. See "fix mtd_blkdevs problem with caches on some architectures" discussion on LKML for more information. Signed-off-by: Ilya Loginov <isloginov@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Peter Horton <phorton@bitbox.co.uk> Cc: "Ed L. Cashin" <ecashin@coraid.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-11-24Merge commit 'origin/master' into nextBenjamin Herrenschmidt
2009-11-24powerpc: Fix build of some FSL platformsBenjamin Herrenschmidt
Commit 87ec0e98cfdd8b68da6a7f9e70142ffc0e404fbb in kumar's next branch broke one of my test configs since it looks like Anton forgot about that mpc832x_rdb platform which still uses the old style probing for the SPI stuff. I'll let them do a cleaner fix that probably involves changing the probing method and getting rid of the platform device but for now this will do to fix it. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-11-24powerpc: Fix wrong error code from ppc32 select syscallarnd@arndb.de
This patch was submitted, discussed, and eventually Acked by everyone, yet still isn't in the tree. See: http://patchwork.ozlabs.org/patch/1240/ Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com> Cc: Arnd Bergmann <arnd@anrdb.de> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-11-24powerpc: Fix DEBUG_HIGHMEM build break from d4515646699Becky Bruce
Code was added to mm/higmem.c that depends on several kmap types that powerpc does not support. We add dummy invalid definitions for KM_NMI, KM_NM_PTE, and KM_IRQ_PTE. According to list discussion, this fix should not be needed anymore starting with 2.6.33. The code is commented to this effect so hopefully we will remember to remove this. Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-11-24powerpc: Kill unused swiotlb variableFUJITA Tomonori
We can kill unused swiotlb variable. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-11-24powerpc: do not export pci_alloc/free_consistentStephen Rothwell
Since they are static inline functions. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-11-24powerpc: kill the obsolete code under is_global_init()Benjamin Herrenschmidt
The code under "if (is_global_init())" is bogus, and is_global_init() itself is not right in mt case. Contrary to what the comment says, nowadays force_sig_info() does kill init even if the handler is SIG_DFL. Note that force_sig_info() clears SIGNAL_UNKILLABLE exactly for this case. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-11-24powerpc/pseries: Add hooks to put the CPU into an appropriate offline stateGautham R Shenoy
When a CPU is offlined on POWER currently, we call rtas_stop_self() and hand the CPU back to the resource pool. This path is used for DLPAR which will cause a change in the LPAR configuration which will be visible outside. This patch changes the default state a CPU is put into when it is offlined. On platforms which support ceding the processor to the hypervisor with latency hint specifier value, during a cpu offline operation, instead of calling rtas_stop_self(), we cede the vCPU to the hypervisor while passing a latency hint specifier value. The Hypervisor can use this hint to provide better energy savings. Also, during the offline operation, the control of the vCPU remains with the LPAR as oppposed to returning it to the resource pool. The patch achieves this by creating an infrastructure to set the preferred_offline_state() which can be either - CPU_STATE_OFFLINE: which is the current behaviour of calling rtas_stop_self() - CPU_STATE_INACTIVE: which cedes the vCPU to the hypervisor with the latency hint specifier. The codepath which wants to perform a DLPAR operation can set the preferred_offline_state() of a CPU to CPU_STATE_OFFLINE before invoking cpu_down(). The patch also provides a boot-time command line argument to disable/enable CPU_STATE_INACTIVE. Signed-off-by: Gautham R Shenoy <ego@in.ibm.com> Signed-off-by: Nathan Fontenot <nfont@austin.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-11-24powerpc/pseries: Add extended_cede_processor() helper function.Gautham R Shenoy
This patch provides an extended_cede_processor() helper function which takes the cede latency hint as an argument. This hint is to be passed on to the hypervisor to cede to the corresponding state on platforms which support it. Signed-off-by: Gautham R Shenoy <ego@in.ibm.com> Signed-off-by: Arun R Bharadwaj <arun@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-11-24powerpc: Move ehea hcall definitions into hvcall.hAnton Blanchard
Move ehea hcall definitions into hvcall.h. Signed-off-by: Anton Blanchard <anton@samba.org> Acked-by: Thomas Klein <tklein@de.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-11-24powerpc: Fixup last users of irq_chip->typenameThomas Gleixner
The typename member of struct irq_chip was kept for migration purposes and is obsolete since more than 2 years. Fix up the leftovers. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: linuxppc-dev@ozlabs.org Acked-by: Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-11-24powerpc: Replace old style lock initializerThomas Gleixner
SPIN_LOCK_UNLOCKED is deprecated. Init the lock array at runtime instead. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: linuxppc-dev@ozlabs.org Tested-by: Stephen Rothwell <sfr@canb.auug.org.au> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>