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* powerpc: reorder per-cpu NUMA information's initializationNishanth Aravamudan2014-08-131-3/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There is an issue currently where NUMA information is used on powerpc (and possibly ia64) before it has been read from the device-tree, which leads to large slab consumption with CONFIG_SLUB and memoryless nodes. NUMA powerpc non-boot CPU's cpu_to_node/cpu_to_mem is only accurate after start_secondary(), similar to ia64, which is invoked via smp_init(). Commit 6ee0578b4daae ("workqueue: mark init_workqueues() as early_initcall()") made init_workqueues() be invoked via do_pre_smp_initcalls(), which is obviously before the secondary processors are online. Additionally, the following commits changed init_workqueues() to use cpu_to_node to determine the node to use for kthread_create_on_node: bce903809ab3f ("workqueue: add wq_numa_tbl_len and wq_numa_possible_cpumask[]") f3f90ad469342 ("workqueue: determine NUMA node of workers accourding to the allowed cpumask") Therefore, when init_workqueues() runs, it sees all CPUs as being on Node 0. On LPARs or KVM guests where Node 0 is memoryless, this leads to a high number of slab deactivations (http://www.spinics.net/lists/linux-mm/msg67489.html). Fix this by initializing the powerpc-specific CPU<->node/local memory node mapping as early as possible, which on powerpc is do_init_bootmem(). Currently that function initializes the mapping for the boot CPU, but we extend it to setup the mapping for all possible CPUs. Then, in smp_prepare_cpus(), we can correspondingly set the per-cpu values for all possible CPUs. That ensures that before the early_initcalls run (and really as early as possible), the per-cpu NUMA mapping is accurate. While testing memoryless nodes on PowerKVM guests with a fix to the workqueue logic to use cpu_to_mem() instead of cpu_to_node(), with a guest topology of: available: 2 nodes (0-1) node 0 cpus: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 node 0 size: 0 MB node 0 free: 0 MB node 1 cpus: 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 node 1 size: 16336 MB node 1 free: 15329 MB node distances: node 0 1 0: 10 40 1: 40 10 the slab consumption decreases from Slab: 932416 kB SUnreclaim: 902336 kB to Slab: 395264 kB SUnreclaim: 359424 kB And we a corresponding increase in the slab efficiency from slab mem objs slabs used active active ------------------------------------------------------------ kmalloc-16384 337 MB 11.28% 100.00% task_struct 288 MB 9.93% 100.00% to slab mem objs slabs used active active ------------------------------------------------------------ kmalloc-16384 37 MB 100.00% 100.00% task_struct 31 MB 100.00% 100.00% Powerpc didn't support memoryless nodes until recently (64bb80d87f01 "powerpc/numa: Enable CONFIG_HAVE_MEMORYLESS_NODES" and 8c272261194d "powerpc/numa: Enable USE_PERCPU_NUMA_NODE_ID"). Those commits also helped improve memory consumption with these kind of environments. Signed-off-by: Nishanth Aravamudan <nacc@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/mm/numa: Fix break placementAndrey Utkin2014-08-051-1/+1
| | | | | | | | Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=81631 Reported-by: David Binderman <dcb314@hotmail.com> Signed-off-by: Andrey Utkin <andrey.krieger.utkin@gmail.com> CC: <stable@vger.kernel.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/mm: fix ".__node_distance" undefinedMike Qiu2014-04-181-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | CHK include/config/kernel.release CHK include/generated/uapi/linux/version.h CHK include/generated/utsrelease.h ... Building modules, stage 2. WARNING: 1 bad relocations c0000000013d6a30 R_PPC64_ADDR64 uprobes_fetch_type_table WRAP arch/powerpc/boot/zImage.pseries WRAP arch/powerpc/boot/zImage.epapr MODPOST 1849 modules ERROR: ".__node_distance" [drivers/block/nvme.ko] undefined! make[1]: *** [__modpost] Error 1 make: *** [modules] Error 2 make: *** Waiting for unfinished jobs.... The reason is symbol "__node_distance" not been exported in powerpc. Signed-off-by: Mike Qiu <qiudayu@linux.vnet.ibm.com> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Nathan Fontenot <nfont@linux.vnet.ibm.com> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> Cc: Jesse Larrew <jlarrew@linux.vnet.ibm.com> Cc: Robert Jennings <rcj@linux.vnet.ibm.com> Cc: Alistair Popple <alistair@popple.id.au> Cc: Mike Qiu <qiudayu@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* power, sched: stop updating inside arch_update_cpu_topology() when nothing ↵Michael Wang2014-04-091-0/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | to be update Since v1: Edited the comment according to Srivatsa's suggestion. During the testing, we encounter below WARN followed by Oops: WARNING: at kernel/sched/core.c:6218 ... NIP [c000000000101660] .build_sched_domains+0x11d0/0x1200 LR [c000000000101358] .build_sched_domains+0xec8/0x1200 PACATMSCRATCH [800000000000f032] Call Trace: [c00000001b103850] [c000000000101358] .build_sched_domains+0xec8/0x1200 [c00000001b1039a0] [c00000000010aad4] .partition_sched_domains+0x484/0x510 [c00000001b103aa0] [c00000000016d0a8] .rebuild_sched_domains+0x68/0xa0 [c00000001b103b30] [c00000000005cbf0] .topology_work_fn+0x10/0x30 ... Oops: Kernel access of bad area, sig: 11 [#1] ... NIP [c00000000045c000] .__bitmap_weight+0x60/0xf0 LR [c00000000010132c] .build_sched_domains+0xe9c/0x1200 PACATMSCRATCH [8000000000029032] Call Trace: [c00000001b1037a0] [c000000000288ff4] .kmem_cache_alloc_node_trace+0x184/0x3a0 [c00000001b103850] [c00000000010132c] .build_sched_domains+0xe9c/0x1200 [c00000001b1039a0] [c00000000010aad4] .partition_sched_domains+0x484/0x510 [c00000001b103aa0] [c00000000016d0a8] .rebuild_sched_domains+0x68/0xa0 [c00000001b103b30] [c00000000005cbf0] .topology_work_fn+0x10/0x30 ... This was caused by that 'sd->groups == NULL' after building groups, which was caused by the empty 'sd->span'. The cpu's domain contained nothing because the cpu was assigned to a wrong node, due to the following unfortunate sequence of events: 1. The hypervisor sent a topology update to the guest OS, to notify changes to the cpu-node mapping. However, the update was actually redundant - i.e., the "new" mapping was exactly the same as the old one. 2. Due to this, the 'updated_cpus' mask turned out to be empty after exiting the 'for-loop' in arch_update_cpu_topology(). 3. So we ended up calling stop-machine() with an empty cpumask list, which made stop-machine internally elect cpumask_first(cpu_online_mask), i.e., CPU0 as the cpu to run the payload (the update_cpu_topology() function). 4. This causes update_cpu_topology() to be run by CPU0. And since 'updates' is kzalloc()'ed inside arch_update_cpu_topology(), update_cpu_topology() finds update->cpu as well as update->new_nid to be 0. In other words, we end up assigning CPU0 (and eventually its siblings) to node 0, incorrectly. Along with the following wrong updating, it causes the sched-domain rebuild code to break and crash the system. Fix this by skipping the topology update in cases where we find that the topology has not actually changed in reality (ie., spurious updates). CC: Benjamin Herrenschmidt <benh@kernel.crashing.org> CC: Paul Mackerras <paulus@samba.org> CC: Nathan Fontenot <nfont@linux.vnet.ibm.com> CC: Stephen Rothwell <sfr@canb.auug.org.au> CC: Andrew Morton <akpm@linux-foundation.org> CC: Robert Jennings <rcj@linux.vnet.ibm.com> CC: Jesse Larrew <jlarrew@linux.vnet.ibm.com> CC: "Srivatsa S. Bhat" <srivatsa.bhat@linux.vnet.ibm.com> CC: Alistair Popple <alistair@popple.id.au> Suggested-by: "Srivatsa S. Bhat" <srivatsa.bhat@linux.vnet.ibm.com> Signed-off-by: Michael Wang <wangyun@linux.vnet.ibm.com> Reviewed-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/numa: Fix decimal permissionsJoe Perches2014-01-291-1/+1
| | | | | | | This should have been octal. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* Merge branch 'next' of ↵Linus Torvalds2014-01-271-5/+91
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc Pull powerpc updates from Ben Herrenschmidt: "So here's my next branch for powerpc. A bit late as I was on vacation last week. It's mostly the same stuff that was in next already, I just added two patches today which are the wiring up of lockref for powerpc, which for some reason fell through the cracks last time and is trivial. The highlights are, in addition to a bunch of bug fixes: - Reworked Machine Check handling on kernels running without a hypervisor (or acting as a hypervisor). Provides hooks to handle some errors in real mode such as TLB errors, handle SLB errors, etc... - Support for retrieving memory error information from the service processor on IBM servers running without a hypervisor and routing them to the memory poison infrastructure. - _PAGE_NUMA support on server processors - 32-bit BookE relocatable kernel support - FSL e6500 hardware tablewalk support - A bunch of new/revived board support - FSL e6500 deeper idle states and altivec powerdown support You'll notice a generic mm change here, it has been acked by the relevant authorities and is a pre-req for our _PAGE_NUMA support" * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (121 commits) powerpc: Implement arch_spin_is_locked() using arch_spin_value_unlocked() powerpc: Add support for the optimised lockref implementation powerpc/powernv: Call OPAL sync before kexec'ing powerpc/eeh: Escalate error on non-existing PE powerpc/eeh: Handle multiple EEH errors powerpc: Fix transactional FP/VMX/VSX unavailable handlers powerpc: Don't corrupt transactional state when using FP/VMX in kernel powerpc: Reclaim two unused thread_info flag bits powerpc: Fix races with irq_work Move precessing of MCE queued event out from syscall exit path. pseries/cpuidle: Remove redundant call to ppc64_runlatch_off() in cpu idle routines powerpc: Make add_system_ram_resources() __init powerpc: add SATA_MV to ppc64_defconfig powerpc/powernv: Increase candidate fw image size powerpc: Add debug checks to catch invalid cpu-to-node mappings powerpc: Fix the setup of CPU-to-Node mappings during CPU online powerpc/iommu: Don't detach device without IOMMU group powerpc/eeh: Hotplug improvement powerpc/eeh: Call opal_pci_reinit() on powernv for restoring config space powerpc/eeh: Add restore_config operation ...
| * powerpc: Add debug checks to catch invalid cpu-to-node mappingsSrivatsa S. Bhat2014-01-151-2/+24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There have been some weird bugs in the past where the kernel tried to associate threads of the same core to different NUMA nodes, and things went haywire after that point (as expected). But unfortunately, root-causing such issues have been quite challenging, due to the lack of appropriate debug checks in the kernel. These bugs usually lead to some odd soft-lockups in the scheduler's build-sched-domain code in the CPU hotplug path, which makes it very hard to trace it back to the incorrect cpu-to-node mappings. So add appropriate debug checks to catch such invalid cpu-to-node mappings as early as possible. Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc: Fix the setup of CPU-to-Node mappings during CPU onlineSrivatsa S. Bhat2014-01-151-3/+67
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On POWER platforms, the hypervisor can notify the guest kernel about dynamic changes in the cpu-numa associativity (VPHN topology update). Hence the cpu-to-node mappings that we got from the firmware during boot, may no longer be valid after such updates. This is handled using the arch_update_cpu_topology() hook in the scheduler, and the sched-domains are rebuilt according to the new mappings. But unfortunately, at the moment, CPU hotplug ignores these updated mappings and instead queries the firmware for the cpu-to-numa relationships and uses them during CPU online. So the kernel can end up assigning wrong NUMA nodes to CPUs during subsequent CPU hotplug online operations (after booting). Further, a particularly problematic scenario can result from this bug: On POWER platforms, the SMT mode can be switched between 1, 2, 4 (and even 8) threads per core. The switch to Single-Threaded (ST) mode is performed by offlining all except the first CPU thread in each core. Switching back to SMT mode involves onlining those other threads back, in each core. Now consider this scenario: 1. During boot, the kernel gets the cpu-to-node mappings from the firmware and assigns the CPUs to NUMA nodes appropriately, during CPU online. 2. Later on, the hypervisor updates the cpu-to-node mappings dynamically and communicates this update to the kernel. The kernel in turn updates its cpu-to-node associations and rebuilds its sched domains. Everything is fine so far. 3. Now, the user switches the machine from SMT to ST mode (say, by running ppc64_cpu --smt=1). This involves offlining all except 1 thread in each core. 4. The user then tries to switch back from ST to SMT mode (say, by running ppc64_cpu --smt=4), and this involves onlining those threads back. Since CPU hotplug ignores the new mappings, it queries the firmware and tries to associate the newly onlined sibling threads to the old NUMA nodes. This results in sibling threads within the same core getting associated with different NUMA nodes, which is incorrect. The scheduler's build-sched-domains code gets thoroughly confused with this and enters an infinite loop and causes soft-lockups, as explained in detail in commit 3be7db6ab (powerpc: VPHN topology change updates all siblings). So to fix this, use the numa_cpu_lookup_table to remember the updated cpu-to-node mappings, and use them during CPU hotplug online operations. Further, we also need to ensure that all threads in a core are assigned to a common NUMA node, irrespective of whether all those threads were online during the topology update. To achieve this, we take care not to use cpu_sibling_mask() since it is not hotplug invariant. Instead, we use cpu_first_sibling_thread() and set up the mappings manually using the 'threads_per_core' value for that particular platform. This helps us ensure that we don't hit this bug with any combination of CPU hotplug and SMT mode switching. Cc: stable@vger.kernel.org Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | memblock: make memblock_set_node() support different memblock_typeTang Chen2014-01-211-3/+5
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | [sfr@canb.auug.org.au: fix powerpc build] Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com> Reviewed-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: "Rafael J . Wysocki" <rjw@sisk.pl> Cc: Chen Tang <imtangchen@gmail.com> Cc: Gong Chen <gong.chen@linux.intel.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Jiang Liu <jiang.liu@huawei.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Lai Jiangshan <laijs@cn.fujitsu.com> Cc: Larry Woodman <lwoodman@redhat.com> Cc: Len Brown <lenb@kernel.org> Cc: Liu Jiang <jiang.liu@huawei.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Michal Nazarewicz <mina86@mina86.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Prarit Bhargava <prarit@redhat.com> Cc: Rik van Riel <riel@redhat.com> Cc: Taku Izumi <izumi.taku@jp.fujitsu.com> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Thomas Renninger <trenn@suse.de> Cc: Toshi Kani <toshi.kani@hp.com> Cc: Vasilis Liaskovitis <vasilis.liaskovitis@profitbricks.com> Cc: Wanpeng Li <liwanp@linux.vnet.ibm.com> Cc: Wen Congyang <wency@cn.fujitsu.com> Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Cc: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm: use pgdat_end_pfn() to simplify the code in archXishi Qiu2013-11-131-2/+1
| | | | | | | | | | | | | | Use "pgdat_end_pfn()" instead of "pgdat->node_start_pfn + pgdat->node_spanned_pages". Simplify the code, no functional change. Signed-off-by: Xishi Qiu <qiuxishi@huawei.com> Cc: James Hogan <james.hogan@imgtec.com> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* powerpc: Fix warnings for arch/powerpc/mm/numa.cRobert Jennings2013-10-301-4/+4
| | | | | | | | | | | | | | | | | | | | | | Simple fixes for sparse warnings in this file. Resolves: arch/powerpc/mm/numa.c:198:24: warning: Using plain integer as NULL pointer arch/powerpc/mm/numa.c:1157:5: warning: symbol 'hot_add_node_scn_to_nid' was not declared. Should it be static? arch/powerpc/mm/numa.c:1238:28: warning: Using plain integer as NULL pointer arch/powerpc/mm/numa.c:1538:6: warning: symbol 'topology_schedule_update' was not declared. Should it be static? Signed-off-by: Robert C Jennings <rcj@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Make NUMA device node code endian safeAlistair Popple2013-08-141-48/+52
| | | | | | | | | The device tree is big endian so make sure we byteswap on little endian. We assume any pHyp calls also return big endian results in memory. Signed-off-by: Alistair Popple <alistair@popple.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Stop using non-architected shared_proc field in lppacaAnton Blanchard2013-08-141-1/+1
| | | | | | | | | | | | | Although the shared_proc field in the lppaca works today, it is not architected. A shared processor partition will always have a non zero yield_count so use that instead. Create a wrapper so users don't have to know about the details. In order for older kernels to continue to work on KVM we need to set the shared_proc bit. While here, remove the ugly bitfield. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: VPHN topology change updates all siblingsRobert Jennings2013-08-011-15/+44
| | | | | | | | | | | | | | | | | | | | | | | | | | | | When an associativity level change is found for one thread, the siblings threads need to be updated as well. This is done today for PRRN in stage_topology_update() but is missing for VPHN in update_cpu_associativity_changes_mask(). This patch will correctly update all thread siblings during a topology change. Without this patch a topology update can result in a CPU in init_sched_groups_power() getting stuck indefinitely in a loop. This loop is built in build_sched_groups(). As a result of the thread moving to a node separate from its siblings the struct sched_group will have its next pointer set to point to itself rather than the sched_group struct of the next thread. This happens because we have a domain without the SD_OVERLAP flag, which is correct, and a topology that doesn't conform with reality (threads on the same core assigned to different numa nodes). When this list is traversed by init_sched_groups_power() it will reach the thread's sched_group structure and loop indefinitely; the cpu will be stuck at this point. The bug was exposed when VPHN was enabled in commit b7abef0 (v3.9). Cc: <stable@vger.kernel.org> [v3.9+] Reported-by: Jan Stancek <jstancek@redhat.com> Signed-off-by: Robert Jennings <rcj@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/numa: Do not update sysfs cpu registration from invalid contextNathan Fontenot2013-07-011-2/+3
| | | | | | | | | | | | The topology update code that updates the cpu node registration in sysfs should not be called while in stop_machine(). The register/unregister calls take a lock and may sleep. This patch moves these calls outside of the call to stop_machine(). Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com> CC: <stable@vger.kernel.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Delete __cpuinit usage from all usersPaul Gortmaker2013-07-011-4/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | The __cpuinit type of throwaway sections might have made sense some time ago when RAM was more constrained, but now the savings do not offset the cost and complications. For example, the fix in commit 5e427ec2d0 ("x86: Fix bit corruption at CPU resume time") is a good example of the nasty type of bugs that can be created with improper use of the various __init prefixes. After a discussion on LKML[1] it was decided that cpuinit should go the way of devinit and be phased out. Once all the users are gone, we can then finally remove the macros themselves from linux/init.h. This removes all the powerpc uses of the __cpuinit macros. There are no __CPUINIT users in assembly files in powerpc. [1] https://lkml.org/lkml/2013/5/20/589 Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Josh Boyer <jwboyer@gmail.com> Cc: Matt Porter <mporter@kernel.crashing.org> Cc: Kumar Gala <galak@kernel.crashing.org> Cc: linuxppc-dev@lists.ozlabs.org Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* Merge branch 'next' of ↵Linus Torvalds2013-05-021-62/+216
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc Pull powerpc update from Benjamin Herrenschmidt: "The main highlights this time around are: - A pile of addition POWER8 bits and nits, such as updated performance counter support (Michael Ellerman), new branch history buffer support (Anshuman Khandual), base support for the new PCI host bridge when not using the hypervisor (Gavin Shan) and other random related bits and fixes from various contributors. - Some rework of our page table format by Aneesh Kumar which fixes a thing or two and paves the way for THP support. THP itself will not make it this time around however. - More Freescale updates, including Altivec support on the new e6500 cores, new PCI controller support, and a pile of new boards support and updates. - The usual batch of trivial cleanups & fixes" * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (156 commits) powerpc: Fix build error for book3e powerpc: Context switch the new EBB SPRs powerpc: Turn on the EBB H/FSCR bits powerpc: Replace CPU_FTR_BCTAR with CPU_FTR_ARCH_207S powerpc: Setup BHRB instructions facility in HFSCR for POWER8 powerpc: Fix interrupt range check on debug exception powerpc: Update tlbie/tlbiel as per ISA doc powerpc: Print page size info during boot powerpc: print both base and actual page size on hash failure powerpc: Fix hpte_decode to use the correct decoding for page sizes powerpc: Decode the pte-lp-encoding bits correctly. powerpc: Use encode avpn where we need only avpn values powerpc: Reduce PTE table memory wastage powerpc: Move the pte free routines from common header powerpc: Reduce the PTE_INDEX_SIZE powerpc: Switch 16GB and 16MB explicit hugepages to a different page table format powerpc: New hugepage directory format powerpc: Don't truncate pgd_index wrongly powerpc: Don't hard code the size of pte page powerpc: Save DAR and DSISR in pt_regs on MCE ...
| * powerpc/pseries: Correct builds break when CONFIG_SMP not definedNathan Fontenot2013-04-301-0/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Correct build failure for powerpc/pseries builds with CONFIG_SMP not defined. The function cpu_sibling_mask has no meaning (or definition) when CONFIG_SMP is not defined. Additionally, the updating of NUMA affinity for a CPU in a UP system doesn't really make sense. This patch ifdef's out the code making the affinity updates for PRRN events to fix the following build break. arch/powerpc/mm/numa.c: In function ‘stage_topology_update’: arch/powerpc/mm/numa.c:1535: error: implicit declaration of function ‘cpu_sibling_mask’ arch/powerpc/mm/numa.c:1535: warning: passing argument 3 of ‘cpumask_or’ makes pointer from integer without a cast make[1]: *** [arch/powerpc/mm/numa.o] Error 1 Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc: Fix build failure after merge of the cgroup treeStephen Rothwell2013-04-301-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | After merging the cgroup tree, today's linux-next build (powerpc ppc64_defconfig) failed like this: arch/powerpc/mm/numa.c: In function 'arch_update_cpu_topology': arch/powerpc/mm/numa.c:1465:2: error: implicit declaration of function 'kzalloc' [-Werror=implicit-function-declaration] arch/powerpc/mm/numa.c:1465:10: error: assignment makes pointer from integer without a cast [-Werror] arch/powerpc/mm/numa.c:1497:2: error: implicit declaration of function 'kfree' [-Werror=implicit-function-declaration] Caused by commit 30c05350c39d ("powerpc/pseries: Use stop machine to update cpu maps") from the powerpc tree interacting with (probably) commit ff794dea52ea ("cpuset: remove include of cgroup.h from cpuset.h") from the cgroup tree. Removing includes from header files is fraught with danger ... The former should have added an include of linux/slab.h to arch/powerpc/mm/numa.c. I have added the following merge fix patch for today (but it should be applied to the powerpc tree ASAP). From: Stephen Rothwell <sfr@canb.auug.org.au> Date: Mon, 29 Apr 2013 14:01:44 +1000 Subject: [PATCH] powerpc: numa.c: using kzalloc/kfree requires including slab.h fixes these build errors: arch/powerpc/mm/numa.c: In function 'arch_update_cpu_topology': arch/powerpc/mm/numa.c:1465:2: error: implicit declaration of function 'kzalloc' [-Werror=implicit-function-declaration] arch/powerpc/mm/numa.c:1465:10: error: assignment makes pointer from integer without a cast [-Werror] arch/powerpc/mm/numa.c:1497:2: error: implicit declaration of function 'kfree' [-Werror=implicit-function-declaration] Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/pseries: Add /proc interface to control topology updatesNathan Fontenot2013-04-261-1/+61
| | | | | | | | | | | | | | | | | | | | | | | | There are instances in which we do not want topology updates to occur. In order to allow this a /proc interface (/proc/powerpc/topology_updates) is introduced so that topology updates can be enabled and disabled. This patch also adds a prrn_is_enabled() call so that PRRN events are handled in the kernel only if topology updating is enabled. Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/pseries: RE-enable Virtual Processor Home Node updatingJesse Larrew2013-04-261-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The new PRRN firmware feature provides a more convenient and event-driven interface than VPHN for notifying Linux of changes to the NUMA affinity of platform resources. However, for practical reasons, it may not be feasible for some customers to update to the latest firmware. For these customers, the VPHN feature supported on previous firmware versions may still be the best option. The VPHN feature was previously disabled due to races with the load balancing code when accessing the NUMA cpu maps, but the new stop_machine() approach protects the NUMA cpu maps from these concurrent accesses. It should be safe to re-enable this feature now. Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/pseries: Update NUMA VDSO information when updating CPU mapsJesse Larrew2013-04-261-1/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The following patch adds vdso_getcpu_init(), which stores the NUMA node for a cpu in SPRG3: Commit 18ad51dd34 ("powerpc: Add VDSO version of getcpu") adds vdso_getcpu_init(), which stores the NUMA node for a cpu in SPRG3. This patch ensures that this information is also updated when the NUMA affinity of a cpu changes. Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/pseries: Use stop machine to update cpu mapsNathan Fontenot2013-04-261-19/+65
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The new PRRN firmware feature allows CPU and memory resources to be transparently reassigned across NUMA boundaries. When this happens, the kernel must update the node maps to reflect the new affinity information. Although the NUMA maps can be protected by locking primitives during the update itself, this is insufficient to prevent concurrent accesses to these structures. Since cpumask_of_node() hands out a pointer to these structures, they can still be modified outside of the lock. Furthermore, tracking down each usage of these pointers and adding locks would be quite invasive and difficult to maintain. The approach used is to make a list of affected cpus and call stop_machine to have the update routine run on each of the affected cpus allowing them to update themselves. Each cpu finds itself in the list of cpus and makes the appropriate updates. We need to have each cpu do this for themselves to handle calls to vdso_getcpu_init() added in a subsequent patch. Situations like these are best handled using stop_machine(). Since the NUMA affinity updates are exceptionally rare events, this approach has the benefit of not adding any overhead while accessing the NUMA maps during normal operation. Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/pseries: Update CPU maps when device tree is updatedJesse Larrew2013-04-261-24/+75
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Platform events such as partition migration or the new PRRN firmware feature can cause the NUMA characteristics of a CPU to change, and these changes will be reflected in the device tree nodes for the affected CPUs. This patch registers a handler for Open Firmware device tree updates and reconfigures the CPU and node maps whenever the associativity changes. Currently, this is accomplished by marking the affected CPUs in the cpu_associativity_changes_mask and allowing arch_update_cpu_topology() to retrieve the new associativity information using hcall_vphn(). Protecting the NUMA cpu maps from concurrent access during an update operation will be addressed in a subsequent patch in this series. Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/pseries: Update numa.c to use updated firmware_has_feature()Nathan Fontenot2013-04-261-19/+3
| | | | | | | | | | | | | | | | Update the numa code to use the updated firmware_has_feature() when checking for type 1 affinity. Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc: fix annotation of fake_numa_create_new_node()Stephen Rothwell2013-04-181-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This function has always been marked as __cpuinit, but is only called from functions marked as __init and references an __initdata variable. So change its annotation to __init. Fixes this build warning: WARNING: arch/powerpc/mm/built-in.o(.cpuinit.text+0x86): Section mismatch in reference from the function .fake_numa_create_new_node() to the variable .init.data:cmdline The function __cpuinit .fake_numa_create_new_node() references a variable __initdata cmdline. If cmdline is only used by .fake_numa_create_new_node then annotate cmdline with a matching annotation. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
| * powerpc: fix numa distance for form0 device treeVaidyanathan Srinivasan2013-04-181-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The following commit breaks numa distance setup for old powerpc systems that use form0 encoding in device tree. commit 41eab6f88f24124df89e38067b3766b7bef06ddb powerpc/numa: Use form 1 affinity to setup node distance Device tree node /rtas/ibm,associativity-reference-points would index into /cpus/PowerPCxxxx/ibm,associativity based on form0 or form1 encoding detected by ibm,architecture-vec-5 property. All modern systems use form1 and current kernel code is correct. However, on older systems with form0 encoding, the numa distance will get hard coded as LOCAL_DISTANCE for all nodes. This causes task scheduling anomaly since scheduler will skip building numa level domain (topmost domain with all cpus) if all numa distances are same. (value of 'level' in sched_init_numa() will remain 0) Prior to the above commit: ((from) == (to) ? LOCAL_DISTANCE : REMOTE_DISTANCE) Restoring compatible behavior with this patch for old powerpc systems with device tree where numa distance are encoded as form0. Signed-off-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
* | Merge branch 'for-3.10' of ↵Linus Torvalds2013-04-291-0/+1
|\ \ | |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup Pull cgroup updates from Tejun Heo: - Fixes and a lot of cleanups. Locking cleanup is finally complete. cgroup_mutex is no longer exposed to individual controlelrs which used to cause nasty deadlock issues. Li fixed and cleaned up quite a bit including long standing ones like racy cgroup_path(). - device cgroup now supports proper hierarchy thanks to Aristeu. - perf_event cgroup now supports proper hierarchy. - A new mount option "__DEVEL__sane_behavior" is added. As indicated by the name, this option is to be used for development only at this point and generates a warning message when used. Unfortunately, cgroup interface currently has too many brekages and inconsistencies to implement a consistent and unified hierarchy on top. The new flag is used to collect the behavior changes which are necessary to implement consistent unified hierarchy. It's likely that this flag won't be used verbatim when it becomes ready but will be enabled implicitly along with unified hierarchy. The option currently disables some of broken behaviors in cgroup core and also .use_hierarchy switch in memcg (will be routed through -mm), which can be used to make very unusual hierarchy where nesting is partially honored. It will also be used to implement hierarchy support for blk-throttle which would be impossible otherwise without introducing a full separate set of control knobs. This is essentially versioning of interface which isn't very nice but at this point I can't see any other options which would allow keeping the interface the same while moving towards hierarchy behavior which is at least somewhat sane. The planned unified hierarchy is likely to require some level of adaptation from userland anyway, so I think it'd be best to take the chance and update the interface such that it's supportable in the long term. Maintaining the existing interface does complicate cgroup core but shouldn't put too much strain on individual controllers and I think it'd be manageable for the foreseeable future. Maybe we'll be able to drop it in a decade. Fix up conflicts (including a semantic one adding a new #include to ppc that was uncovered by header the file changes) as per Tejun. * 'for-3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup: (45 commits) cpuset: fix compile warning when CONFIG_SMP=n cpuset: fix cpu hotplug vs rebuild_sched_domains() race cpuset: use rebuild_sched_domains() in cpuset_hotplug_workfn() cgroup: restore the call to eventfd->poll() cgroup: fix use-after-free when umounting cgroupfs cgroup: fix broken file xattrs devcg: remove parent_cgroup. memcg: force use_hierarchy if sane_behavior cgroup: remove cgrp->top_cgroup cgroup: introduce sane_behavior mount option move cgroupfs_root to include/linux/cgroup.h cgroup: convert cgroupfs_root flag bits to masks and add CGRP_ prefix cgroup: make cgroup_path() not print double slashes Revert "cgroup: remove bind() method from cgroup_subsys." perf: make perf_event cgroup hierarchical cgroup: implement cgroup_is_descendant() cgroup: make sure parent won't be destroyed before its children cgroup: remove bind() method from cgroup_subsys. devcg: remove broken_hierarchy tag cgroup: remove cgroup_lock_is_held() ...
* | powerpc/mm/numa: use setup_nr_node_ids() instead of opencoding.Cody P Schafer2013-04-291-6/+3
|/ | | | | | | | | | | | [sfr@canb.auug.org.au: add missing semicolon] Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* powerpc+of: Move of_drconf_cell struct definition to asm/prom.hNathan Fontenot2012-11-151-12/+0
| | | | | | | | | | This patch moves the definition of the of_drconf_cell struct to asm/prom.h to make it available for all powerpc/pseries code. Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com> Acked-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/vphn: Fix arch_update_cpu_topology() return valueJesse Larrew2012-09-051-3/+4
| | | | | | | | | | | arch_update_cpu_topology() should only return 1 when the topology has actually changed, and should return 0 otherwise. This patch fixes a potential bug where rebuild_sched_domains() would reinitialize the sched domains even when the topology hasn't changed. Signed-off-by: Jesse Larrew <jlarrew@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* Merge branch 'merge' into nextBenjamin Herrenschmidt2012-07-101-1/+1
|\ | | | | | | We want to bring in the latest IRQ fixes
| * powerpc/numa: Avoid stupid uninitialized warning from gccBenjamin Herrenschmidt2012-07-101-1/+1
| | | | | | | | | | | | | | | | | | Newer gcc are being a bit blind here (it's pretty obvious we don't reach the code path using the array if we haven't initialized the pointer) but none of that is performance critical so let's just silence it. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | powerpc/numa: Fix OF node refcounting bugGavin Shan2012-07-031-0/+2
|/ | | | | | | | | | The form affinity for NUMA is set to 1 if the firmware supports OPAL. Otherwise, we have to retrieve that from OF node "/chosen". For the latter case, OF node "/chosen" reference count was never decreased. Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Fix uninitialised error in numa.cMichael Neuling2012-06-291-1/+1
| | | | | | | | | | | | chroma_defconfig currently gives me this with gcc 4.6: arch/powerpc/mm/numa.c:638:13: error: 'dm' may be used uninitialized in this function [-Werror=uninitialized] It's a bogus warning/error since of_get_drconf_memory() only writes it anyway. Signed-off-by: Michael Neuling <mikey@neuling.org> cc: <stable@kernel.org> [v3.3+] Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* Disintegrate asm/system.h for PowerPCDavid Howells2012-03-281-1/+1
| | | | | | | | Disintegrate asm/system.h for PowerPC. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> cc: linuxppc-dev@lists.ozlabs.org
* cpumask: update setup_node_to_cpumask_map() commentsWanlong Gao2012-01-121-1/+1
| | | | | | | | | | | | | node_to_cpumask() has been replaced by cpumask_of_node(), and wholly removed since commit 29c337a0 ("cpumask: remove obsolete node_to_cpumask now everyone uses cpumask_of_node"). So update the comments for setup_node_to_cpumask_map(). Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com> Acked-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'for-linus' of ↵Linus Torvalds2012-01-081-1/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (53 commits) Kconfig: acpi: Fix typo in comment. misc latin1 to utf8 conversions devres: Fix a typo in devm_kfree comment btrfs: free-space-cache.c: remove extra semicolon. fat: Spelling s/obsolate/obsolete/g SCSI, pmcraid: Fix spelling error in a pmcraid_err() call tools/power turbostat: update fields in manpage mac80211: drop spelling fix types.h: fix comment spelling for 'architectures' typo fixes: aera -> area, exntension -> extension devices.txt: Fix typo of 'VMware'. sis900: Fix enum typo 'sis900_rx_bufer_status' decompress_bunzip2: remove invalid vi modeline treewide: Fix comment and string typo 'bufer' hyper-v: Update MAINTAINERS treewide: Fix typos in various parts of the kernel, and fix some comments. clockevents: drop unknown Kconfig symbol GENERIC_CLOCKEVENTS_MIGR gpio: Kconfig: drop unknown symbol 'CS5535_GPIO' leds: Kconfig: Fix typo 'D2NET_V2' sound: Kconfig: drop unknown symbol ARCH_CLPS7500 ... Fix up trivial conflicts in arch/powerpc/platforms/40x/Kconfig (some new kconfig additions, close to removed commented-out old ones)
| * treewide: Fix typos in various parts of the kernel, and fix some comments.Justin P. Mattock2011-12-021-1/+1
| | | | | | | | | | | | | | | | | | The below patch fixes some typos in various parts of the kernel, as well as fixes some comments. Please let me know if I missed anything, and I will try to get it changed and resent. Signed-off-by: Justin P. Mattock <justinmattock@gmail.com> Acked-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* | Merge branch 'driver-core-next' of ↵Linus Torvalds2012-01-071-4/+4
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core * 'driver-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (73 commits) arm: fix up some samsung merge sysdev conversion problems firmware: Fix an oops on reading fw_priv->fw in sysfs loading file Drivers:hv: Fix a bug in vmbus_driver_unregister() driver core: remove __must_check from device_create_file debugfs: add missing #ifdef HAS_IOMEM arm: time.h: remove device.h #include driver-core: remove sysdev.h usage. clockevents: remove sysdev.h arm: convert sysdev_class to a regular subsystem arm: leds: convert sysdev_class to a regular subsystem kobject: remove kset_find_obj_hinted() m86k: gpio - convert sysdev_class to a regular subsystem mips: txx9_sram - convert sysdev_class to a regular subsystem mips: 7segled - convert sysdev_class to a regular subsystem sh: dma - convert sysdev_class to a regular subsystem sh: intc - convert sysdev_class to a regular subsystem power: suspend - convert sysdev_class to a regular subsystem power: qe_ic - convert sysdev_class to a regular subsystem power: cmm - convert sysdev_class to a regular subsystem s390: time - convert sysdev_class to a regular subsystem ... Fix up conflicts with 'struct sysdev' removal from various platform drivers that got changed: - arch/arm/mach-exynos/cpu.c - arch/arm/mach-exynos/irq-eint.c - arch/arm/mach-s3c64xx/common.c - arch/arm/mach-s3c64xx/cpu.c - arch/arm/mach-s5p64x0/cpu.c - arch/arm/mach-s5pv210/common.c - arch/arm/plat-samsung/include/plat/cpu.h - arch/powerpc/kernel/sysfs.c and fix up cpu_is_hotpluggable() as per Greg in include/linux/cpu.h
| * \ Merge branch 'driver-core-next' into Linux 3.2Greg Kroah-Hartman2012-01-061-4/+4
| |\ \ | | |/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | This resolves the conflict in the arch/arm/mach-s3c64xx/s3c6400.c file, and it fixes the build error in the arch/x86/kernel/microcode_core.c file, that the merge did not catch. The microcode_core.c patch was provided by Stephen Rothwell <sfr@canb.auug.org.au> who was invaluable in the merge issues involved with the large sysdev removal process in the driver-core tree. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| | * cpu: convert 'cpu' and 'machinecheck' sysdev_class to a regular subsystemKay Sievers2011-12-211-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This moves the 'cpu sysdev_class' over to a regular 'cpu' subsystem and converts the devices to regular devices. The sysdev drivers are implemented as subsystem interfaces now. After all sysdev classes are ported to regular driver core entities, the sysdev implementation will be entirely removed from the kernel. Userspace relies on events and generic sysfs subsystem infrastructure from sysdev devices, which are made available with this conversion. Cc: Haavard Skinnemoen <hskinnemoen@gmail.com> Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no> Cc: Tony Luck <tony.luck@intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.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> Cc: "David S. Miller" <davem@davemloft.net> Cc: Chris Metcalf <cmetcalf@tilera.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Borislav Petkov <bp@amd64.org> Cc: Tigran Aivazian <tigran@aivazian.fsnet.co.uk> Cc: Len Brown <lenb@kernel.org> Cc: Zhang Rui <rui.zhang@intel.com> Cc: Dave Jones <davej@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Russell King <rmk+kernel@arm.linux.org.uk> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: "Srivatsa S. Bhat" <srivatsa.bhat@linux.vnet.ibm.com> Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* | | Merge branch 'next' of ↵Linus Torvalds2012-01-061-2/+2
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (185 commits) powerpc: fix compile error with 85xx/p1010rdb.c powerpc: fix compile error with 85xx/p1023_rds.c powerpc/fsl: add MSI support for the Freescale hypervisor arch/powerpc/sysdev/fsl_rmu.c: introduce missing kfree powerpc/fsl: Add support for Integrated Flash Controller powerpc/fsl: update compatiable on fsl 16550 uart nodes powerpc/85xx: fix PCI and localbus properties in p1022ds.dts powerpc/85xx: re-enable ePAPR byte channel driver in corenet32_smp_defconfig powerpc/fsl: Update defconfigs to enable some standard FSL HW features powerpc: Add TBI PHY node to first MDIO bus sbc834x: put full compat string in board match check powerpc/fsl-pci: Allow 64-bit PCIe devices to DMA to any memory address powerpc: Fix unpaired probe_hcall_entry and probe_hcall_exit offb: Fix setting of the pseudo-palette for >8bpp offb: Add palette hack for qemu "standard vga" framebuffer offb: Fix bug in calculating requested vram size powerpc/boot: Change the WARN to INFO for boot wrapper overlap message powerpc/44x: Fix build error on currituck platform powerpc/boot: Change the load address for the wrapper to fit the kernel powerpc/44x: Enable CRASH_DUMP for 440x ... Fix up a trivial conflict in arch/powerpc/include/asm/cputime.h due to the additional sparse-checking code for cputime_t.
| * | | powerpc/mm: Fix section mismatch for read_n_cellsDavid Rientjes2011-12-191-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | read_n_cells() cannot be marked as .devinit.text since it is referenced from two functions that are not in that section: of_get_lmb_size() and hot_add_drconf_scn_to_nid(). Signed-off-by: David Rientjes <rientjes@google.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * | | powerpc/mm: Fix section mismatch for mark_reserved_regions_for_nidDavid Rientjes2011-12-191-1/+1
| |/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | mark_reserved_regions_for_nid() is only called from do_init_bootmem(), which is in .init.text, so it must be in the same section to avoid a section mismatch warning. Reported-by: Subrata Modak <subrata@linux.vnet.ibm.com> Signed-off-by: David Rientjes <rientjes@google.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | | powerpc: Use HAVE_MEMBLOCK_NODE_MAPTejun Heo2011-12-081-6/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | powerpc doesn't access early_node_map[] directly and enabling HAVE_MEMBLOCK_NODE_MAP is trivial - replacing add_active_range() calls with memblock_set_node() and selecting HAVE_MEMBLOCK_NODE_MAP is enough. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Yinghai Lu <yinghai@kernel.org>
* | | Merge branch 'master' into x86/memblockTejun Heo2011-11-281-17/+29
|\ \ \ | |/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts & resolutions: * arch/x86/xen/setup.c dc91c728fd "xen: allow extra memory to be in multiple regions" 24aa07882b "memblock, x86: Replace memblock_x86_reserve/free..." conflicted on xen_add_extra_mem() updates. The resolution is trivial as the latter just want to replace memblock_x86_reserve_range() with memblock_reserve(). * drivers/pci/intel-iommu.c 166e9278a3f "x86/ia64: intel-iommu: move to drivers/iommu/" 5dfe8660a3d "bootmem: Replace work_with_active_regions() with..." conflicted as the former moved the file under drivers/iommu/. Resolved by applying the chnages from the latter on the moved file. * mm/Kconfig 6661672053a "memblock: add NO_BOOTMEM config symbol" c378ddd53f9 "memblock, x86: Make ARCH_DISCARD_MEMBLOCK a config option" conflicted trivially. Both added config options. Just letting both add their own options resolves the conflict. * mm/memblock.c d1f0ece6cdc "mm/memblock.c: small function definition fixes" ed7b56a799c "memblock: Remove memblock_memory_can_coalesce()" confliected. The former updates function removed by the latter. Resolution is trivial. Signed-off-by: Tejun Heo <tj@kernel.org>
| * | powerpc/numa: NUMA topology support for PowerNVDipankar Sarma2011-11-081-7/+17
| |/ | | | | | | | | | | | | | | | | | | This patch adds support for numa topology on powernv platforms running OPAL formware. It checks for the type of platform at run time and sets the affinity form correctly so that NUMA topology can be discovered correctly. Signed-off-by: Dipankar Sarma <dipankar@in.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * Merge branch 'modsplit-Oct31_2011' of ↵Linus Torvalds2011-11-061-1/+1
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux * 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux: (230 commits) Revert "tracing: Include module.h in define_trace.h" irq: don't put module.h into irq.h for tracking irqgen modules. bluetooth: macroize two small inlines to avoid module.h ip_vs.h: fix implicit use of module_get/module_put from module.h nf_conntrack.h: fix up fallout from implicit moduleparam.h presence include: replace linux/module.h with "struct module" wherever possible include: convert various register fcns to macros to avoid include chaining crypto.h: remove unused crypto_tfm_alg_modname() inline uwb.h: fix implicit use of asm/page.h for PAGE_SIZE pm_runtime.h: explicitly requires notifier.h linux/dmaengine.h: fix implicit use of bitmap.h and asm/page.h miscdevice.h: fix up implicit use of lists and types stop_machine.h: fix implicit use of smp.h for smp_processor_id of: fix implicit use of errno.h in include/linux/of.h of_platform.h: delete needless include <linux/module.h> acpi: remove module.h include from platform/aclinux.h miscdevice.h: delete unnecessary inclusion of module.h device_cgroup.h: delete needless include <linux/module.h> net: sch_generic remove redundant use of <linux/module.h> net: inet_timewait_sock doesnt need <linux/module.h> ... Fix up trivial conflicts (other header files, and removal of the ab3550 mfd driver) in - drivers/media/dvb/frontends/dibx000_common.c - drivers/media/video/{mt9m111.c,ov6650.c} - drivers/mfd/ab3550-core.c - include/linux/dmaengine.h
| | * powerpc: various straight conversions from module.h --> export.hPaul Gortmaker2011-10-311-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | All these files were including module.h just for the basic EXPORT_SYMBOL infrastructure. We can shift them off to the export.h header which is a way smaller footprint and thus realize some compile time gains. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
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