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2009-09-23BUILD_BUG_ON(): fix it and a couple of bogus uses of itJan Beulich
gcc permitting variable length arrays makes the current construct used for BUILD_BUG_ON() useless, as that doesn't produce any diagnostic if the controlling expression isn't really constant. Instead, this patch makes it so that a bit field gets used here. Consequently, those uses where the condition isn't really constant now also need fixing. Note that in the gfp.h, kmemcheck.h, and virtio_config.h cases MAYBE_BUILD_BUG_ON() really just serves documentation purposes - even if the expression is compile time constant (__builtin_constant_p() yields true), the array is still deemed of variable length by gcc, and hence the whole expression doesn't have the intended effect. [akpm@linux-foundation.org: make arch/sparc/include/asm/vio.h compile] [akpm@linux-foundation.org: more nonsensical assertions in tpm.c..] Signed-off-by: Jan Beulich <jbeulich@novell.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Rajiv Andrade <srajiv@linux.vnet.ibm.com> Cc: Mimi Zohar <zohar@us.ibm.com> Cc: James Morris <jmorris@namei.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-09-22mm: add MAP_HUGETLB for mmaping pseudo-anonymous huge page regionsArnd Bergmann
Add a flag for mmap that will be used to request a huge page region that will look like anonymous memory to user space. This is accomplished by using a file on the internal vfsmount. MAP_HUGETLB is a modifier of MAP_ANONYMOUS and so must be specified with it. The region will behave the same as a MAP_ANONYMOUS region using small pages. The patch also adds the MAP_STACK flag, which was previously defined only on some architectures but not on others. Since MAP_STACK is meant to be a hint only, architectures can define it without assigning a specific meaning to it. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Eric B Munson <ebmunson@us.ibm.com> Cc: Hugh Dickins <hugh.dickins@tiscali.co.uk> Cc: David Rientjes <rientjes@google.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-09-21perf: Do the big rename: Performance Counters -> Performance EventsIngo Molnar
Bye-bye Performance Counters, welcome Performance Events! In the past few months the perfcounters subsystem has grown out its initial role of counting hardware events, and has become (and is becoming) a much broader generic event enumeration, reporting, logging, monitoring, analysis facility. Naming its core object 'perf_counter' and naming the subsystem 'perfcounters' has become more and more of a misnomer. With pending code like hw-breakpoints support the 'counter' name is less and less appropriate. All in one, we've decided to rename the subsystem to 'performance events' and to propagate this rename through all fields, variables and API names. (in an ABI compatible fashion) The word 'event' is also a bit shorter than 'counter' - which makes it slightly more convenient to write/handle as well. Thanks goes to Stephane Eranian who first observed this misnomer and suggested a rename. User-space tooling and ABI compatibility is not affected - this patch should be function-invariant. (Also, defconfigs were not touched to keep the size down.) This patch has been generated via the following script: FILES=$(find * -type f | grep -vE 'oprofile|[^K]config') sed -i \ -e 's/PERF_EVENT_/PERF_RECORD_/g' \ -e 's/PERF_COUNTER/PERF_EVENT/g' \ -e 's/perf_counter/perf_event/g' \ -e 's/nb_counters/nb_events/g' \ -e 's/swcounter/swevent/g' \ -e 's/tpcounter_event/tp_event/g' \ $FILES for N in $(find . -name perf_counter.[ch]); do M=$(echo $N | sed 's/perf_counter/perf_event/g') mv $N $M done FILES=$(find . -name perf_event.*) sed -i \ -e 's/COUNTER_MASK/REG_MASK/g' \ -e 's/COUNTER/EVENT/g' \ -e 's/\<event\>/event_id/g' \ -e 's/counter/event/g' \ -e 's/Counter/Event/g' \ $FILES ... to keep it as correct as possible. This script can also be used by anyone who has pending perfcounters patches - it converts a Linux kernel tree over to the new naming. We tried to time this change to the point in time where the amount of pending patches is the smallest: the end of the merge window. Namespace clashes were fixed up in a preparatory patch - and some stylistic fallout will be fixed up in a subsequent patch. ( NOTE: 'counters' are still the proper terminology when we deal with hardware registers - and these sed scripts are a bit over-eager in renaming them. I've undone some of that, but in case there's something left where 'counter' would be better than 'event' we can undo that on an individual basis instead of touching an otherwise nicely automated patch. ) Suggested-by: Stephane Eranian <eranian@google.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Paul Mackerras <paulus@samba.org> Reviewed-by: Arjan van de Ven <arjan@linux.intel.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: David Howells <dhowells@redhat.com> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: <linux-arch@vger.kernel.org> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-09-17Merge branch 'sched-core-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (37 commits) sched: Fix SD_POWERSAVING_BALANCE|SD_PREFER_LOCAL vs SD_WAKE_AFFINE sched: Stop buddies from hogging the system sched: Add new wakeup preemption mode: WAKEUP_RUNNING sched: Fix TASK_WAKING & loadaverage breakage sched: Disable wakeup balancing sched: Rename flags to wake_flags sched: Clean up the load_idx selection in select_task_rq_fair sched: Optimize cgroup vs wakeup a bit sched: x86: Name old_perf in a unique way sched: Implement a gentler fair-sleepers feature sched: Add SD_PREFER_LOCAL sched: Add a few SYNC hint knobs to play with sched: Fix sync wakeups again sched: Add WF_FORK sched: Rename sync arguments sched: Rename select_task_rq() argument sched: Feature to disable APERF/MPERF cpu_power x86: sched: Provide arch implementations using aperf/mperf x86: Add generic aperf/mperf code x86: Move APERF/MPERF into a X86_FEATURE ... Fix up trivial conflict in arch/x86/include/asm/processor.h due to nearby addition of amd_get_nb_id() declaration from the EDAC merge.
2009-09-17sparc64: vio: Kill BUILD_BUG_ON() in vio_dring_avail().David S. Miller
GCC can't see the 'constant' properly as computed by is_power_of_2() etc. Signed-off-by: David S. Miller <davem@davemloft.net>
2009-09-16Merge branch 'linux-next' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6 * 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6: (75 commits) PCI hotplug: clean up acpi_run_hpp() PCI hotplug: acpiphp: use generic pci_configure_slot() PCI hotplug: shpchp: use generic pci_configure_slot() PCI hotplug: pciehp: use generic pci_configure_slot() PCI hotplug: add pci_configure_slot() PCI hotplug: clean up acpi_get_hp_params_from_firmware() interface PCI hotplug: acpiphp: don't cache hotplug_params in acpiphp_bridge PCI hotplug: acpiphp: remove superfluous _HPP/_HPX evaluation PCI: Clear saved_state after the state has been restored PCI PM: Return error codes from pci_pm_resume() PCI: use dev_printk in quirk messages PCI / PCIe portdrv: Fix pcie_portdrv_slot_reset() PCI Hotplug: convert acpi_pci_detect_ejectable() to take an acpi_handle PCI Hotplug: acpiphp: find bridges the easy way PCI: pcie portdrv: remove unused variable PCI / ACPI PM: Propagate wake-up enable for devices w/o ACPI support ACPI PM: Replace wakeup.prepared with reference counter PCI PM: Introduce device flag wakeup_prepared PCI / ACPI PM: Rework some debug messages PCI PM: Simplify PCI wake-up code ... Fixed up conflict in arch/powerpc/kernel/pci_64.c due to OF device tree scanning having been moved and merged for the 32- and 64-bit cases. The 'needs_freset' initialization added in 6e19314cc ("PCI/powerpc: support PCIe fundamental reset") is now in arch/powerpc/kernel/pci_of_scan.c.
2009-09-16sched: Disable wakeup balancingPeter Zijlstra
Sysbench thinks SD_BALANCE_WAKE is too agressive and kbuild doesn't really mind too much, SD_BALANCE_NEWIDLE picks up most of the slack. On a dual socket, quad core, dual thread nehalem system: sysbench (--num_threads=16): SD_BALANCE_WAKE-: 13982 tx/s SD_BALANCE_WAKE+: 15688 tx/s kbuild (-j16): SD_BALANCE_WAKE-: 47.648295846 seconds time elapsed ( +- 0.312% ) SD_BALANCE_WAKE+: 47.608607360 seconds time elapsed ( +- 0.026% ) (same within noise) Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-09-15Merge branch 'agp-next' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/airlied/agp-2.6 * 'agp-next' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/agp-2.6: agp/intel: remove restore in resume agp: fix uninorth build intel-agp: Set dma mask for i915 agp: kill phys_to_gart() and gart_to_phys() intel-agp: fix sglist allocation to avoid vmalloc() intel-agp: Move repeated sglist free into separate function agp: Switch agp_{un,}map_page() to take struct page * argument agp: tidy up handling of scratch pages w.r.t. DMA API intel_agp: Use PCI DMA API correctly on chipsets new enough to have IOMMU agp: Add generic support for graphics dma remapping agp: Switch mask_memory() method to take address argument again, not page
2009-09-15sched: Reduce forkexec_idxPeter Zijlstra
If we're looking to place a new task, we might as well find the idlest position _now_, not 1 tick ago. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-09-15sched: Tweak wake_idxPeter Zijlstra
When merging select_task_rq_fair() and sched_balance_self() we lost the use of wake_idx, restore that and set them to 0 to make wake balancing more aggressive. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-09-15sched: Merge select_task_rq_fair() and sched_balance_self()Peter Zijlstra
The problem with wake_idle() is that is doesn't respect things like cpu_power, which means it doesn't deal well with SMT nor the recent RT interaction. To cure this, it needs to do what sched_balance_self() does, which leads to the possibility of merging select_task_rq_fair() and sched_balance_self(). Modify sched_balance_self() to: - update_shares() when walking up the domain tree, (it only called it for the top domain, but it should have done this anyway), which allows us to remove this ugly bit from try_to_wake_up(). - do wake_affine() on the smallest domain that contains both this (the waking) and the prev (the wakee) cpu for WAKE invocations. Then use the top-down balance steps it had to replace wake_idle(). This leads to the dissapearance of SD_WAKE_BALANCE and SD_WAKE_IDLE_FAR, with SD_WAKE_IDLE replaced with SD_BALANCE_WAKE. SD_WAKE_AFFINE needs SD_BALANCE_WAKE to be effective. Touch all topology bits to replace the old with new SD flags -- platforms might need re-tuning, enabling SD_BALANCE_WAKE conditionally on a NUMA distance seems like a good additional feature, magny-core and small nehalem systems would want this enabled, systems with slow interconnects would not. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-09-14Merge branch 'master' into for-linusRafael J. Wysocki
2009-09-14Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next-2.6: (21 commits) sparc64: Initial niagara2 perf counter support. sparc64: Perf counter 'nop' event is not constant. sparc64: Provide a way to specify a perf counter overflow IRQ enable bit. sparc64: Provide hypervisor tracing bit support for perf counters. sparc64: Initial hw perf counter support. sparc64: Implement a real set_perf_counter_pending(). sparc64: Use nmi_enter() and nmi_exit(), as needed. sparc64: Provide extern decls for sparc_??u_type strings. sparc64: Make touch_nmi_watchdog() actually work. sparc64: Kill unnecessary cast in profile_timer_exceptions_notify(). sparc64: Manage NMI watchdog enabling like x86. sparc: add basic support for 'perf' sparc: convert /proc/io_map, /proc/dvma_map to seq_file sparc, leon: sparc-leon specific SRMMU initialization and bootup fixes. sparc,leon: Added support for AMBAPP bus. sparc,leon: Introduce the sparc-leon CPU type. sparc,leon: Redefine MMU register access asi if CONFIG_LEON sparc,leon: CONFIG_SPARC_LEON option and leon specific files. sparc64: cheaper asm/uaccess.h inclusion SPARC: fix duplicate declaration ...
2009-09-14Merge 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: (1623 commits) netxen: update copyright netxen: fix tx timeout recovery netxen: fix file firmware leak netxen: improve pci memory access netxen: change firmware write size tg3: Fix return ring size breakage netxen: build fix for INET=n cdc-phonet: autoconfigure Phonet address Phonet: back-end for autoconfigured addresses Phonet: fix netlink address dump error handling ipv6: Add IFA_F_DADFAILED flag net: Add DEVTYPE support for Ethernet based devices mv643xx_eth.c: remove unused txq_set_wrr() ucc_geth: Fix hangs after switching from full to half duplex ucc_geth: Rearrange some code to avoid forward declarations phy/marvell: Make non-aneg speed/duplex forcing work for 88E1111 PHYs drivers/net/phy: introduce missing kfree drivers/net/wan: introduce missing kfree net: force bridge module(s) to be GPL Subject: [PATCH] appletalk: Fix skb leak when ipddp interface is not loaded ... Fixed up trivial conflicts: - arch/x86/include/asm/socket.h converted to <asm-generic/socket.h> in the x86 tree. The generic header has the same new #define's, so that works out fine. - drivers/net/tun.c fix conflict between 89f56d1e9 ("tun: reuse struct sock fields") that switched over to using 'tun->socket.sk' instead of the redundantly available (and thus removed) 'tun->sk', and 2b980dbd ("lsm: Add hooks to the TUN driver") which added a new 'tun->sk' use. Noted in 'next' by Stephen Rothwell.
2009-09-11Merge branch 'master' of /home/davem/src/GIT/linux-2.6/David S. Miller
Conflicts: arch/sparc/Kconfig
2009-09-11Merge branch 'core-locking-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (32 commits) locking, m68k/asm-offsets: Rename signal defines locking: Inline spinlock code for all locking variants on s390 locking: Simplify spinlock inlining locking: Allow arch-inlined spinlocks locking: Move spinlock function bodies to header file locking, m68k: Calculate thread_info offset with asm offset locking, m68k/asm-offsets: Rename pt_regs offset defines locking, sparc: Rename __spin_try_lock() and friends locking, powerpc: Rename __spin_try_lock() and friends lockdep: Remove recursion stattistics lockdep: Simplify lock_stat seqfile code lockdep: Simplify lockdep_chains seqfile code lockdep: Simplify lockdep seqfile code lockdep: Fix missing entries in /proc/lock_chains lockdep: Fix missing entry in /proc/lock_stat lockdep: Fix memory usage info of BFS lockdep: Reintroduce generation count to make BFS faster lockdep: Deal with many similar locks lockdep: Introduce lockdep_assert_held() lockdep: Fix style nits ...
2009-09-11Merge 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: (59 commits) x86/gart: Do not select AGP for GART_IOMMU x86/amd-iommu: Initialize passthrough mode when requested x86/amd-iommu: Don't detach device from pt domain on driver unbind x86/amd-iommu: Make sure a device is assigned in passthrough mode x86/amd-iommu: Align locking between attach_device and detach_device x86/amd-iommu: Fix device table write order x86/amd-iommu: Add passthrough mode initialization functions x86/amd-iommu: Add core functions for pd allocation/freeing x86/dma: Mark iommu_pass_through as __read_mostly x86/amd-iommu: Change iommu_map_page to support multiple page sizes x86/amd-iommu: Support higher level PTEs in iommu_page_unmap x86/amd-iommu: Remove old page table handling macros x86/amd-iommu: Use 2-level page tables for dma_ops domains x86/amd-iommu: Remove bus_addr check in iommu_map_page x86/amd-iommu: Remove last usages of IOMMU_PTE_L0_INDEX x86/amd-iommu: Change alloc_pte to support 64 bit address space x86/amd-iommu: Introduce increase_address_space function x86/amd-iommu: Flush domains if address space size was increased x86/amd-iommu: Introduce set_dte_entry function x86/amd-iommu: Add a gneric version of amd_iommu_flush_all_devices ...
2009-09-11Merge branch 'core-debug-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'core-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: debug lockups: Improve lockup detection, fix generic arch fallback debug lockups: Improve lockup detection
2009-09-10sparc64: Initial hw perf counter support.David S. Miller
Only supports one simple counter and only UltraSPARC-IIIi chips. Signed-off-by: David S. Miller <davem@davemloft.net>
2009-09-10sparc64: Implement a real set_perf_counter_pending().David S. Miller
When the perf counter subsystem needs to reschedule work out from an NMI, it invokes set_perf_counter_pending(). This triggers a non-NMI irq which should invoke perf_counter_do_pending(). Currently this won't trigger because sparc64 won't trigger the perf counter subsystem from NMIs, but when the HW counter support is added it will. Signed-off-by: David S. Miller <davem@davemloft.net>
2009-09-10sparc64: Provide extern decls for sparc_??u_type strings.David S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-09-10Merge branch 'master' into for-linusRafael J. Wysocki
2009-09-09PCI: remove pcibios_scan_all_fns()Alex Chiang
This was #define'd as 0 on all platforms, so let's get rid of it. This change makes pci_scan_slot() slightly easier to read. Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Tony Luck <tony.luck@intel.com> Cc: David Howells <dhowells@redhat.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jeff Dike <jdike@addtoit.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Reviewed-by: Matthew Wilcox <willy@linux.intel.com> Acked-by: Russell King <linux@arm.linux.org.uk> Acked-by: Ralf Baechle <ralf@linux-mips.org> Acked-by: Kyle McMartin <kyle@mcmartin.ca> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Paul Mundt <lethal@linux-sh.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-09-08sparc64: Manage NMI watchdog enabling like x86.David S. Miller
Use a per-cpu 'wd_enabled' boolean and a global atomic_t count of watchdog NMI enabled cpus which is set to '-1' if something is wrong with the watchdog and it can't be used. Signed-off-by: David S. Miller <davem@davemloft.net>
2009-09-04Merge branch 'amd-iommu/2.6.32' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/joro/linux-2.6-iommu into core/iommu
2009-09-04sparc: add basic support for 'perf'Jens Axboe
This wires up the perf_counter_open() syscall so that basic software support for perf is working. Signed-off-by: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-09-04Merge branch 'master' of /home/davem/src/GIT/linux-2.6/David S. Miller
2009-08-31locking, sparc: Rename __spin_try_lock() and friendsHeiko Carstens
Needed to avoid namespace conflicts when the common code function bodies of _spin_try_lock() etc. are moved to a header file where the function name would be __spin_try_lock(). Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Acked-by: David S. Miller <davem@davemloft.net> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Horst Hartmann <horsth@linux.vnet.ibm.com> Cc: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: David Miller <davem@davemloft.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Roman Zippel <zippel@linux-m68k.org> Cc: <linux-arch@vger.kernel.org> LKML-Reference: <20090831124416.306495811@de.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-08-25Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6: sparc64: Validate linear D-TLB misses. sparc64: Update defconfig. sparc32: Update defconfig. sparc32: Kill trap table freeing code. sparc: sys32.S incorrect compat-layer splice() system call sparc: Use page_fault_out_of_memory() for VM_FAULT_OOM. sparc64: Sign extend length arg to truncate syscalls when compat. sparc: Fix cleanup crash in bbc_envctrl_cleanup()
2009-08-25sparc64: Validate linear D-TLB misses.David S. Miller
When page alloc debugging is not enabled, we essentially accept any virtual address for linear kernel TLB misses. But with kgdb, kernel address probing, and other facilities we can try to access arbitrary crap. So, make sure the address we miss on will translate to physical memory that actually exists. In order to make this work we have to embed the valid address bitmap into the kernel image. And in order to make that less expensive we make an adjustment, in that the max physical memory address is decreased to "1 << 41", even on the chips that support a 42-bit physical address space. We can do this because bit 41 indicates "I/O space" and thus covers non-memory ranges. The result of this is that: 1) kpte_linear_bitmap shrinks from 2K to 1K in size 2) we need 64K more for the valid address bitmap We can't let the valid address bitmap be dynamically allocated once we start using it to validate TLB misses, otherwise we have crazy issues to deal with wrt. recursive TLB misses and such. If we're in a TLB miss it could be the deepest trap level that's legal inside of the cpu. So if we TLB miss referencing the bitmap, the cpu will be out of trap levels and enter RED state. To guard against out-of-range accesses to the bitmap, we have to check to make sure no bits in the physical address above bit 40 are set. We could export and use last_valid_pfn for this check, but that's just an unnecessary extra memory reference. On the plus side of all this, since we load all of these translations into the special 4MB mapping TSB, and we check the TSB first for TLB misses, there should be absolutely no real cost for these new checks in the TLB miss path. Reported-by: heyongli@gmail.com Signed-off-by: David S. Miller <davem@davemloft.net>
2009-08-17sparc,leon: Introduce the sparc-leon CPU type.Konrad Eisele
Add sparc_leon enum, M_LEON|M_LEON3_SOC machine. Add compilation of leon.c in mm and kernel if CONFIG_SPARC_LEON is defined. Add sparc_leon dependent initialization to switch statements + head.S. Signed-off-by: Konrad Eisele <konrad@gaisler.com> Reviewed-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-08-17sparc,leon: Redefine MMU register access asi if CONFIG_LEONKonrad Eisele
SPARC-LEON has a different ASI for mmu register accesses. Signed-off-by: Konrad Eisele <konrad@gaisler.com> Reviewed-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-08-17sparc,leon: CONFIG_SPARC_LEON option and leon specific files.Konrad Eisele
The macro CONFIG_SPARC_LEON will shield, if undefined, the sun-sparc code from LEON specific code. In particular include/asm/leon.h will get empty through #ifdef and leon_kernel.c and leon_mm.c will not be compiled. Signed-off-by: Konrad Eisele <konrad@gaisler.com> Reviewed-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-08-16sparc64: cheaper asm/uaccess.h inclusionAlexey Dobriyan
sched.h inclusion is definitely not needed like in 32-bit version, remove it, fixup compilation. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-08-16SPARC: fix duplicate declarationJaswinder Singh Rajput
Only difference for 32 and 64 bit version is dma64_addr_t and rest is same. Also fixed the following 'make includecheck' warning: arch/sparc/include/asm/types.h: asm-generic/int-ll64.h is included more than once. Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-08-12Merge branch 'master' of ↵David S. Miller
master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: arch/microblaze/include/asm/socket.h
2009-08-10sparc: Add CONFIG_DMA_API_DEBUG supportFUJITA Tomonori
All we need to do for CONFIG_DMA_API_DEBUG support is call dma_debug_init() in DMA code common for SPARC32 and SPARC64. Now SPARC32 uses two dma_map_ops structures for pci and sbus so there is not much dma stuff for SPARC32 in kernel/dma.c. kernel/ioport.c also includes dma stuff for SPARC32. So let's put all the dma stuff for SPARC32 in kernel/ioport.c and make kernel/dma.c common for SPARC32 and SPARC64. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Tested-by: Robert Reif <reif@earthlink.net> Acked-by: David S. Miller <davem@davemloft.net> Cc: tony.luck@intel.com Cc: fenghua.yu@intel.com LKML-Reference: <1249872797-1314-9-git-send-email-fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-08-10sparc: Use asm-generic/pci-dma-compatFUJITA Tomonori
This converts SPARC to use asm-generic/pci-dma-compat instead of the homegrown mechnism. SPARC32 has two dma_map_ops structures for pci and sbus (removing arch/sparc/kernel/dma.c, PCI and SBUS DMA accessor). The global 'dma_ops' is set to sbus_dma_ops and get_dma_ops() returns pci32_dma_ops for pci devices so we can use the appropriate dma mapping operations. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Tested-by: Robert Reif <reif@earthlink.net> Acked-by: David S. Miller <davem@davemloft.net> Cc: tony.luck@intel.com Cc: fenghua.yu@intel.com LKML-Reference: <1249872797-1314-8-git-send-email-fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-08-10sparc: Use asm-generic/dma-mapping-common.hFUJITA Tomonori
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Tested-by: Robert Reif <reif@earthlink.net> Acked-by: David S. Miller <davem@davemloft.net> Cc: tony.luck@intel.com Cc: fenghua.yu@intel.com LKML-Reference: <1249872797-1314-5-git-send-email-fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-08-10sparc: Use dma_map_ops structFUJITA Tomonori
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Tested-by: Robert Reif <reif@earthlink.net> Acked-by: David S. Miller <davem@davemloft.net> Cc: tony.luck@intel.com Cc: fenghua.yu@intel.com LKML-Reference: <1249872797-1314-4-git-send-email-fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-08-05net: implement a SO_DOMAIN getsockoptionJan Engelhardt
This sockopt goes in line with SO_TYPE and SO_PROTOCOL. It makes it possible for userspace programs to pass around file descriptors — I am referring to arguments-to-functions, but it may even work for the fd passing over UNIX sockets — without needing to also pass the auxiliary information (PF_INET6/IPPROTO_TCP). Signed-off-by: Jan Engelhardt <jengelh@medozas.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-08-05net: implement a SO_PROTOCOL getsockoptionJan Engelhardt
Similar to SO_TYPE returning the socket type, SO_PROTOCOL allows to retrieve the protocol used with a given socket. I am not quite sure why we have that-many copies of socket.h, and why the values are not the same on all arches either, but for where hex numbers dominate, I use 0x1029 for SO_PROTOCOL as that seems to be the next free unused number across a bunch of operating systems, or so Google results make me want to believe. SO_PROTOCOL for others just uses the next free Linux number, 38. Signed-off-by: Jan Engelhardt <jengelh@medozas.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-08-03agp: kill phys_to_gart() and gart_to_phys()David Woodhouse
There seems to be no reason for these -- they're a 1:1 mapping on all platforms. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-08-03debug lockups: Improve lockup detection, fix generic arch fallbackIngo Molnar
As Andrew noted, my previous patch ("debug lockups: Improve lockup detection") broke/removed SysRq-L support from architecture that do not provide a __trigger_all_cpu_backtrace implementation. Restore a fallback path and clean up the SysRq-L machinery a bit: - Rename the arch method to arch_trigger_all_cpu_backtrace() - Simplify the define - Document the method a bit - in the hope of more architectures adding support for it. [ The patch touches Sparc code for the rename. ] Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: "David S. Miller" <davem@davemloft.net> LKML-Reference: <20090802140809.7ec4bb6b.akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-07-29Merge branch 'master' into for-linusRafael J. Wysocki
2009-07-27mm: Pass virtual address to [__]p{te,ud,md}_free_tlb()Benjamin Herrenschmidt
mm: Pass virtual address to [__]p{te,ud,md}_free_tlb() Upcoming paches to support the new 64-bit "BookE" powerpc architecture will need to have the virtual address corresponding to PTE page when freeing it, due to the way the HW table walker works. Basically, the TLB can be loaded with "large" pages that cover the whole virtual space (well, sort-of, half of it actually) represented by a PTE page, and which contain an "indirect" bit indicating that this TLB entry RPN points to an array of PTEs from which the TLB can then create direct entries. Thus, in order to invalidate those when PTE pages are deleted, we need the virtual address to pass to tlbilx or tlbivax instructions. The old trick of sticking it somewhere in the PTE page struct page sucks too much, the address is almost readily available in all call sites and almost everybody implemets these as macros, so we may as well add the argument everywhere. I added it to the pmd and pud variants for consistency. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: David Howells <dhowells@redhat.com> [MN10300 & FRV] Acked-by: Nick Piggin <npiggin@suse.de> Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com> [s390] Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-07-22Driver Core: Add platform device arch data V3Magnus Damm
Allow architecture specific data in struct platform_device V3. With this patch struct pdev_archdata is added to struct platform_device, similar to struct dev_archdata in found in struct device. Useful for architecture code that needs to keep extra data associated with each platform device. Struct pdev_archdata is different from dev.platform_data, the convention is that dev.platform_data points to driver-specific data. It may or may not be required by the driver. The format of this depends on driver but is the same across architectures. The structure pdev_archdata is a place for architecture specific data. This data is handled by architecture specific code (for example runtime PM), and since it is architecture specific it should _never_ be touched by device driver code. Exactly like struct dev_archdata but for platform devices. [rjw: This change is for power management mostly and that's why it goes through the suspend tree.] Signed-off-by: Magnus Damm <damm@igel.co.jp> Acked-by: Kevin Hilman <khilman@deeprootsystems.com> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
2009-07-10sched: INIT_PREEMPT_COUNTPeter Zijlstra
Pull the initial preempt_count value into a single definition site. Maintainers for: alpha, ia64 and m68k, please have a look, your arch code is funny. The header magic is a bit odd, but similar to the KERNEL_DS one, CPP waits with expanding these macros until the INIT_THREAD_INFO macro itself is expanded, which is in arch/*/kernel/init_task.c where we've already included sched.h so we're good. Cc: tony.luck@intel.com Cc: rth@twiddle.net Cc: geert@linux-m68k.org Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Matt Mackall <mpm@selenic.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-17Delete pcibios_select_rootMatthew Wilcox
This function was only used by pci_claim_resource(), and the last commit deleted that use. Signed-off-by: Matthew Wilcox <willy@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-16Merge branch 'akpm'Linus Torvalds
* akpm: (182 commits) fbdev: bf54x-lq043fb: use kzalloc over kmalloc/memset fbdev: *bfin*: fix __dev{init,exit} markings fbdev: *bfin*: drop unnecessary calls to memset fbdev: bfin-t350mcqb-fb: drop unused local variables fbdev: blackfin has __raw I/O accessors, so use them in fb.h fbdev: s1d13xxxfb: add accelerated bitblt functions tcx: use standard fields for framebuffer physical address and length fbdev: add support for handoff from firmware to hw framebuffers intelfb: fix a bug when changing video timing fbdev: use framebuffer_release() for freeing fb_info structures radeon: P2G2CLK_ALWAYS_ONb tested twice, should 2nd be P2G2CLK_DAC_ALWAYS_ONb? s3c-fb: CPUFREQ frequency scaling support s3c-fb: fix resource releasing on error during probing carminefb: fix possible access beyond end of carmine_modedb[] acornfb: remove fb_mmap function mb862xxfb: use CONFIG_OF instead of CONFIG_PPC_OF mb862xxfb: restrict compliation of platform driver to PPC Samsung SoC Framebuffer driver: add Alpha Channel support atmel-lcdc: fix pixclock upper bound detection offb: use framebuffer_alloc() to allocate fb_info struct ... Manually fix up conflicts due to kmemcheck in mm/slab.c