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2010-08-09radix-tree: omplement function radix_tree_range_tag_if_taggedJan Kara1-0/+94
Implement function for setting one tag if another tag is set for each item in given range. Signed-off-by: Jan Kara <jack@suse.cz> Cc: Dave Chinner <david@fromorbit.com> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Cc: Chris Mason <chris.mason@oracle.com> Cc: Theodore Ts'o <tytso@mit.edu> Cc: Jens Axboe <axboe@kernel.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-08-09tmpfs: add accurate compare function to percpu_counter libraryTim Chen1-0/+27
Add percpu_counter_compare that allows for a quick but accurate comparison of percpu_counter with a given value. A rough count is provided by the count field in percpu_counter structure, without accounting for the other values stored in individual cpu counters. The actual count is a sum of count and the cpu counters. However, count field is never different from the actual value by a factor of batch*num_online_cpu. We do not need to get actual count for comparison if count is different from the given value by this factor and allows for quick comparison without summing up all the per cpu counters. Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com> Cc: Hugh Dickins <hughd@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-08-06Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6Linus Torvalds1-1/+0
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6: (28 commits) driver core: device_rename's new_name can be const sysfs: Remove owner field from sysfs struct attribute powerpc/pci: Remove owner field from attribute initialization in PCI bridge init regulator: Remove owner field from attribute initialization in regulator core driver leds: Remove owner field from attribute initialization in bd2802 driver scsi: Remove owner field from attribute initialization in ARCMSR driver scsi: Remove owner field from attribute initialization in LPFC driver cgroupfs: create /sys/fs/cgroup to mount cgroupfs on Driver core: Add BUS_NOTIFY_BIND_DRIVER driver core: fix memory leak on one error path in bus_register() debugfs: no longer needs to depend on SYSFS sysfs: Fix one more signature discrepancy between sysfs implementation and docs. sysfs: fix discrepancies between implementation and documentation dcdbas: remove a redundant smi_data_buf_free in dcdbas_exit dmi-id: fix a memory leak in dmi_id_init error path sysfs: sysfs_chmod_file's attr can be const firmware: Update hotplug script Driver core: move platform device creation helpers to .init.text (if MODULE=n) Driver core: reduce duplicated code for platform_device creation Driver core: use kmemdup in platform_device_add_resources ...
2010-08-06Merge branch 'x86-mm-for-linus' of ↵Linus Torvalds1-5/+5
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86: Ioremap: fix wrong physical address handling in PAT code x86, tlb: Clean up and correct used type x86, iomap: Fix wrong page aligned size calculation in ioremapping code x86, mm: Create symbolic index into address_markers array x86, ioremap: Fix normal ram range check x86, ioremap: Fix incorrect physical address handling in PAE mode x86-64, mm: Initialize VDSO earlier on 64 bits x86, kmmio/mmiotrace: Fix double free of kmmio_fault_pages
2010-08-06Merge branch 'perf-core-for-linus' of ↵Linus Torvalds1-15/+20
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: (162 commits) tracing/kprobes: unregister_trace_probe needs to be called under mutex perf: expose event__process function perf events: Fix mmap offset determination perf, powerpc: fsl_emb: Restore setting perf_sample_data.period perf, powerpc: Convert the FSL driver to use local64_t perf tools: Don't keep unreferenced maps when unmaps are detected perf session: Invalidate last_match when removing threads from rb_tree perf session: Free the ref_reloc_sym memory at the right place x86,mmiotrace: Add support for tracing STOS instruction perf, sched migration: Librarize task states and event headers helpers perf, sched migration: Librarize the GUI class perf, sched migration: Make the GUI class client agnostic perf, sched migration: Make it vertically scrollable perf, sched migration: Parameterize cpu height and spacing perf, sched migration: Fix key bindings perf, sched migration: Ignore unhandled task states perf, sched migration: Handle ignored migrate out events perf: New migration tool overview tracing: Drop cpparg() macro perf: Use tracepoint_synchronize_unregister() to flush any pending tracepoint call ... Fix up trivial conflicts in Makefile and drivers/cpufreq/cpufreq.c
2010-08-06Merge branch 'core-rcu-for-linus' of ↵Linus Torvalds1-0/+6
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: Revert "net: Make accesses to ->br_port safe for sparse RCU" mce: convert to rcu_dereference_index_check() net: Make accesses to ->br_port safe for sparse RCU vfs: add fs.h to define struct file lockdep: Add an in_workqueue_context() lockdep-based test function rcu: add __rcu API for later sparse checking rcu: add an rcu_dereference_index_check() tree/tiny rcu: Add debug RCU head objects mm: remove all rcu head initializations fs: remove all rcu head initializations, except on_stack initializations powerpc: remove all rcu head initializations
2010-08-05Merge branch 'kbuild' of ↵Linus Torvalds1-0/+13
git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6 * 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6: modpost: support objects with more than 64k sections trivial: fix a typo in a filename frv: clean up arch/frv/Makefile kbuild: allow assignment to {A,C}FLAGS_KERNEL on the command line kbuild: allow assignment to {A,C,LD}FLAGS_MODULE on the command line Kbuild: Add option to set -femit-struct-debug-baseonly Makefile: "make kernelrelease" should show the correct full kernel version Makefile.build: make KBUILD_SYMTYPES work again
2010-08-05debugfs: no longer needs to depend on SYSFSRandy Dunlap1-1/+0
debugfs no longer uses 'kernel_subsys' (which is gone), and other kernel/ksysfs.c code is always built, so DEBUG_FS does not need to depend on SYSFS. Fixes this kconfig warning: warning: (TREE_RCU_TRACE || AMD_IOMMU_STATS && AMD_IOMMU || MTD_UBI_DEBUG && MTD && SYSFS && MTD_UBI || UBIFS_FS_DEBUG && MISC_FILESYSTEMS && UBIFS_FS || DEBUG_KMEMLEAK && DEBUG_KERNEL && EXPERIMENTAL && !MEMORY_HOTPLUG && (X86 || ARM || PPC || S390 || SPARC64 || SUPERH || MICROBLAZE) && SYSFS || TRACING || X86_PTDUMP && DEBUG_KERNEL || BLK_DEV_IO_TRACE && TRACING_SUPPORT && FTRACE && SYSFS && BLOCK) selects DEBUG_FS which has unmet direct dependencies (SYSFS) Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-08-05Merge branch 'for-linus' of git://git.monstr.eu/linux-2.6-microblazeLinus Torvalds1-3/+3
* 'for-linus' of git://git.monstr.eu/linux-2.6-microblaze: (49 commits) microblaze: Add KGDB support microblaze: Support brki rX, 0x18 for user application debugging microblaze: Remove nop after MSRCLR/SET, MTS, MFS instructions microblaze: Simplify syscall rutine microblaze: Move PT_MODE saving to delay slot microblaze: Fix _interrupt function microblaze: Fix _user_exception function microblaze: Put together addik instructions microblaze: Use delay slot in syscall macros microblaze: Save kernel mode in delay slot microblaze: Do not mix register saving and mode setting microblaze: Move SAVE_STATE upward microblaze: entry.S: Macro optimization microblaze: Optimize hw exception rutine microblaze: Implement clear_ums macro and fix SAVE_STATE macro microblaze: Remove additional setup for kernel_mode microblaze: Optimize SAVE_STATE macro microblaze: Remove additional loading microblaze: Completely remove working with R11 register microblaze: Do not setup BIP in _debug_exception ...
2010-08-05Merge branch 'perf/nmi' into perf/coreIngo Molnar1-15/+20
Conflicts: kernel/Makefile Merge reason: Add the now complete topic, fix the conflict. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-08-04Merge branch 'for-next' of ↵Linus Torvalds3-3/+3
git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (48 commits) Documentation: update broken web addresses. fix comment typo "choosed" -> "chosen" hostap:hostap_hw.c Fix typo in comment Fix spelling contorller -> controller in comments Kconfig.debug: FAIL_IO_TIMEOUT: typo Faul -> Fault fs/Kconfig: Fix typo Userpace -> Userspace Removing dead MACH_U300_BS26 drivers/infiniband: Remove unnecessary casts of private_data fs/ocfs2: Remove unnecessary casts of private_data libfc: use ARRAY_SIZE scsi: bfa: use ARRAY_SIZE drm: i915: use ARRAY_SIZE drm: drm_edid: use ARRAY_SIZE synclink: use ARRAY_SIZE block: cciss: use ARRAY_SIZE comment typo fixes: charater => character fix comment typos concerning "challenge" arm: plat-spear: fix typo in kerneldoc reiserfs: typo comment fix update email address ...
2010-08-04Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6Linus Torvalds1-0/+9
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6: (1443 commits) phy/marvell: add 88ec048 support igb: Program MDICNFG register prior to PHY init e1000e: correct MAC-PHY interconnect register offset for 82579 hso: Add new product ID can: Add driver for esd CAN-USB/2 device l2tp: fix export of header file for userspace can-raw: Fix skb_orphan_try handling Revert "net: remove zap_completion_queue" net: cleanup inclusion phy/marvell: add 88e1121 interface mode support u32: negative offset fix net: Fix a typo from "dev" to "ndev" igb: Use irq_synchronize per vector when using MSI-X ixgbevf: fix null pointer dereference due to filter being set for VLAN 0 e1000e: Fix irq_synchronize in MSI-X case e1000e: register pm_qos request on hardware activation ip_fragment: fix subtracting PPPOE_SES_HLEN from mtu twice net: Add getsockopt support for TCP thin-streams cxgb4: update driver version cxgb4: add new PCI IDs ... Manually fix up conflicts in: - drivers/net/e1000e/netdev.c: due to pm_qos registration infrastructure changes - drivers/net/phy/marvell.c: conflict between adding 88ec048 support and cleaning up the IDs - drivers/net/wireless/ipw2x00/ipw2100.c: trivial ipw2100_pm_qos_req conflict (registration change vs marking it static)
2010-08-04Merge branch 'stable/swiotlb-0.8.3' of ↵Linus Torvalds1-56/+81
git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb-2.6 * 'stable/swiotlb-0.8.3' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb-2.6: swiotlb: Make swiotlb bookkeeping functions visible in the header file. swiotlb: search and replace "int dir" with "enum dma_data_direction dir" swiotlb: Make internal bookkeeping functions have 'swiotlb_tbl' prefix. swiotlb: add the swiotlb initialization function with iotlb memory swiotlb: add swiotlb_tbl_map_single library function
2010-08-04Merge branch 'master' into for-nextJiri Kosina8-595/+76
2010-08-04Merge commit 'v2.6.35' into kbuild/kbuildMichal Marek46-983/+2160
Conflicts: arch/powerpc/Makefile
2010-08-04microblaze: Disable FRAME_POINTER selectionMichal Simek1-3/+3
Microblaze doesn't support frame pointers. Ftrace code uses CALLER_ADDR1 which is defined in linux/ftrace.h. For Microblaze is 0. Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-07-27ARM: 6213/1: atomic64_test: add ARM as supported architectureWill Deacon1-1/+1
ARM has support for the atomic64_dec_if_positive operation so ensure that it is tested by the atomic64_test routine. Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-07-21Kconfig.debug: FAIL_IO_TIMEOUT: typo Faul -> FaultTakuya Yoshikawa1-1/+1
The last 't' of 'fault' is missing in the description of FAIL_IO_TIMEOUT. Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2010-07-14Kbuild: Add option to set -femit-struct-debug-baseonlyAndi Kleen1-0/+13
Newer gcc has a -femit-struct-debug-baseonly option that dramatically reduces the size of object files with debug info. What it does is to only emit type information for structures when the structures are defined in the same file or in a header file. This means the type information for most headers are not included. This is not good when the type information is actually needed (e.g. with kgdb or systemtap) But often kernel hackers only care about line numbers and don't need all the type information anyways. In this case setting the option can be a big win: A build dir for a specific x86-64 configuration with gcc 4.5 shrunk from 2.3G to 1.2G. The compilation was also nearly a minute faster. Signed-off-by: Andi Kleen <ak@linux.intel.com> [mmarek: reformatted help text] Signed-off-by: Michal Marek <mmarek@suse.cz>
2010-07-14lmb: rename to memblockYinghai Lu3-546/+0
via following scripts FILES=$(find * -type f | grep -vE 'oprofile|[^K]config') sed -i \ -e 's/lmb/memblock/g' \ -e 's/LMB/MEMBLOCK/g' \ $FILES for N in $(find . -name lmb.[ch]); do M=$(echo $N | sed 's/lmb/memblock/g') mv $N $M done and remove some wrong change like lmbench and dlmb etc. also move memblock.c from lib/ to mm/ Suggested-by: Ingo Molnar <mingo@elte.hu> Acked-by: "H. Peter Anvin" <hpa@zytor.com> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-07-11lib/devres.c: fix comment typoKulikov Vasiliy1-1/+1
'Unamp' should be 'Unmap'. Signed-off-by: Kulikov Vasiliy <segooon@gmail.com> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2010-07-09x86, ioremap: Fix incorrect physical address handling in PAE modeKenji Kaneshige1-5/+5
Current x86 ioremap() doesn't handle physical address higher than 32-bit properly in X86_32 PAE mode. When physical address higher than 32-bit is passed to ioremap(), higher 32-bits in physical address is cleared wrongly. Due to this bug, ioremap() can map wrong address to linear address space. In my case, 64-bit MMIO region was assigned to a PCI device (ioat device) on my system. Because of the ioremap()'s bug, wrong physical address (instead of MMIO region) was mapped to linear address space. Because of this, loading ioatdma driver caused unexpected behavior (kernel panic, kernel hangup, ...). Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> LKML-Reference: <4C1AE680.7090408@jp.fujitsu.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2010-07-06Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds1-44/+72
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: rbtree: Undo augmented trees performance damage and regression x86, Calgary: Limit the max PHB number to 256
2010-07-05rbtree: Undo augmented trees performance damage and regressionPeter Zijlstra1-44/+72
Reimplement augmented RB-trees without sprinkling extra branches all over the RB-tree code (which lives in the scheduler hot path). This approach is 'borrowed' from Fabio's BFQ implementation and relies on traversing the rebalance path after the RB-tree-op to correct the heap property for insertion/removal and make up for the damage done by the tree rotations. For insertion the rebalance path is trivially that from the new node upwards to the root, for removal it is that from the deepest node in the path from the to be removed node that will still be around after the removal. [ This patch also fixes a video driver regression reported by Ali Gholami Rudi - the memtype->subtree_max_end was updated incorrectly. ] Acked-by: Suresh Siddha <suresh.b.siddha@intel.com> Acked-by: Venkatesh Pallipadi <venki@google.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Tested-by: Ali Gholami Rudi <ali@rudi.ir> Cc: Fabio Checconi <fabio@gandalf.sssup.it> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> LKML-Reference: <1275414172.27810.27961.camel@twins> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-07-04module: initialize module dynamic debug laterYehuda Sadeh1-1/+1
We should initialize the module dynamic debug datastructures only after determining that the module is not loaded yet. This fixes a bug that introduced in 2.6.35-rc2, where when a trying to load a module twice, we also load it's dynamic printing data twice which causes all sorts of nasty issues. Also handle the dynamic debug cleanup later on failure. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (removed a #ifdef) Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-07-04vsprintf: Recursive vsnprintf: Add "%pV", struct va_formatJoe Perches1-0/+9
Add the ability to print a format and va_list from a structure pointer Allows __dev_printk to be implemented as a single printk while minimizing string space duplication. %pV should not be used without some mechanism to verify the format and argument use ala __attribute__(format (printf(...))). Signed-off-by: Joe Perches <joe@perches.com> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-07-01Merge branch 'linus' into core/rcuIngo Molnar2-3/+2
Conflicts: fs/fs-writeback.c Merge reason: Resolve the conflict Note, i picked the version from Linus's tree, which effectively reverts the fs-writeback.c bits of: b97181f: fs: remove all rcu head initializations, except on_stack initializations As the upstream changes to this file changed this code heavily and the first attempt to resolve the conflict resulted in a non-booting kernel. It's safer to re-try this portion of the commit cleanly. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-06-29genalloc: fix allocation from end of poolImre Deak1-1/+0
bitmap_find_next_zero_area requires the size of the bitmap, we instead passed the last suitable position. This made it impossible to allocate from the end of the pool. Fixes a regression introduced by 243797f59b748f679ab88d456fcc4f92236d724b ("genalloc: use bitmap_find_next_zero_area"). Signed-off-by: Imre Deak <imre.deak@nokia.com> Cc: Zygo Blaxell <zygo.blaxell@xandros.com> Cc: Tejun Heo <tj@kernel.org> Acked-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-06-23idr: fix RCU lockdep splat in idr_get_next()Paul E. McKenney1-2/+2
Convert to rcu_dereference_raw() given that many callers may have many different locking models. Located-by: Miles Lane <miles.lane@gmail.com> Tested-by: Miles Lane <miles.lane@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2010-06-16Merge branch 'master' into for-nextJiri Kosina16-134/+296
2010-06-16fix typos concerning "initiali[zs]e"Uwe Kleine-König1-1/+1
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2010-06-14tree/tiny rcu: Add debug RCU head objectsMathieu Desnoyers1-0/+6
Helps finding racy users of call_rcu(), which results in hangs because list entries are overwritten and/or skipped. Changelog since v4: - Bissectability is now OK - Now generate a WARN_ON_ONCE() for non-initialized rcu_head passed to call_rcu(). Statically initialized objects are detected with object_is_static(). - Rename rcu_head_init_on_stack to init_rcu_head_on_stack. - Remove init_rcu_head() completely. Changelog since v3: - Include comments from Lai Jiangshan This new patch version is based on the debugobjects with the newly introduced "active state" tracker. Non-initialized entries are all considered as "statically initialized". An activation fixup (triggered by call_rcu()) takes care of performing the debug object initialization without issuing any warning. Since we cannot increase the size of struct rcu_head, I don't see much room to put an identifier for statically initialized rcu_head structures. So for now, we have to live without "activation without explicit init" detection. But the main purpose of this debug option is to detect double-activations (double call_rcu() use of a rcu_head before the callback is executed), which is correctly addressed here. This also detects potential internal RCU callback corruption, which would cause the callbacks to be executed twice. Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> CC: David S. Miller <davem@davemloft.net> CC: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> CC: akpm@linux-foundation.org CC: mingo@elte.hu CC: laijs@cn.fujitsu.com CC: dipankar@in.ibm.com CC: josh@joshtriplett.org CC: dvhltc@us.ibm.com CC: niv@us.ibm.com CC: tglx@linutronix.de CC: peterz@infradead.org CC: rostedt@goodmis.org CC: Valdis.Kletnieks@vt.edu CC: dhowells@redhat.com CC: eric.dumazet@gmail.com CC: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Lai Jiangshan <laijs@cn.fujitsu.com>
2010-06-07swiotlb: Make swiotlb bookkeeping functions visible in the header file.Konrad Rzeszutek Wilk1-15/+14
We put the functions dealing with the operations on the SWIOTLB buffer in the header and make those functions non-static. And also make the functions exported via EXPORT_SYMBOL_GPL. See "swiotlb: swiotlb: add swiotlb_tbl_map_single library function" for full description of patchset. [v2: swiotlb_sync_single_range_for_* no more. Remove usage.] Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Acked-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Tested-by: Albert Herranz <albert_herranz@yahoo.es>
2010-06-07swiotlb: search and replace "int dir" with "enum dma_data_direction dir"Konrad Rzeszutek Wilk1-10/+13
.. to catch anybody doing something funky. See "swiotlb: swiotlb: add swiotlb_tbl_map_single library function" for full description of patchset. [v2: swiotlb_sync_single_range_* no more - removed usage] [v3: enum dma_data_direction direction -> enum dma_data_direction dir] Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Acked-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Tested-by: Albert Herranz <albert_herranz@yahoo.es>
2010-06-07swiotlb: Make internal bookkeeping functions have 'swiotlb_tbl' prefix.Konrad Rzeszutek Wilk1-11/+13
The functions that operate on io_tlb_list/io_tlb_start/io_tlb_orig_addr have the prefix 'swiotlb_tbl' now. See "swiotlb: swiotlb: add swiotlb_tbl_map_single library function" for full description of patchset. Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Acked-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Tested-by: Albert Herranz <albert_herranz@yahoo.es>
2010-06-07swiotlb: add the swiotlb initialization function with iotlb memoryFUJITA Tomonori1-18/+30
This enables the caller to initialize swiotlb with its own iotlb memory. See "swiotlb: swiotlb: add swiotlb_tbl_map_single library function" for full description of patchset. [v2: changed ..with_tlb to ..with_tbl] Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Tested-by: Albert Herranz <albert_herranz@yahoo.es>
2010-06-07swiotlb: add swiotlb_tbl_map_single library functionFUJITA Tomonori1-8/+17
swiotlb_tbl_map_single() takes the dma address of iotlb instead of using swiotlb_virt_to_bus(). [v2: changed swiotlb_tlb to swiotlb_tbl] [v3: changed u64 to dma_addr_t] This patch: This is a set of patches that separate the address translation (virt_to_phys, virt_to_bus, etc) and allocation of the SWIOTLB buffer from the SWIOTLB library. The idea behind this set of patches is to make it possible to have separate mechanisms for translating virtual to physical or virtual to DMA addresses on platforms which need an SWIOTLB, and where physical != PCI bus address and also to allocate the core IOTLB memory outside SWIOTLB. One customers of this is the pv-ops project, which can switch between different modes of operation depending on the environment it is running in: bare-metal or virtualized (Xen for now). Another is the Wii DMA - used to implement the MEM2 DMA facility needed by its EHCI controller (for details: http://lkml.org/lkml/2010/5/18/303) On bare-metal SWIOTLB is used when there are no hardware IOMMU. In virtualized environment it used when PCI pass-through is enabled for the guest. The problems with PCI pass-through is that the guest's idea of PFN's is not the real thing. To fix that, there is translation layer for PFN->machine frame number and vice-versa. To bubble that up to the SWIOTLB layer there are two possible solutions. One solution has been to wholesale copy the SWIOTLB, stick it in arch/x86/xen/swiotlb.c and modify the virt_to_phys, phys_to_virt and others to use the Xen address translation functions. Unfortunately, since the kernel can run on bare-metal, there would be big code overlap with the real SWIOTLB. (git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen.git xen/dom0/swiotlb-new) Another approach, which this set of patches explores, is to abstract the address translation and address determination functions away from the SWIOTLB book-keeping functions. This way the core SWIOTLB library functions are present in one place, while the address related functions are in a separate library that can be loaded when running under non-bare-metal platform. Changelog: Since the last posting [v8.2] Konrad has done: - Added this changelog in the patch and referenced in the other patches this description. - 'enum dma_data_direction direction' to 'enum dma.. dir' so to be unified. [v8-v8.2 changes:] - Rolled-up the last two patches in one. - Rebased against linus latest. That meant dealing with swiotlb_sync_single_range_* changes. - added Acked-by: Fujita Tomonori and Tested-by: Albert Herranz [v7-v8 changes:] - Minimized the list of exported functions. - Integrated Fujita's patches and changed "swiotlb_tlb" to "swiotlb_tbl" in them. [v6-v7 changes:] - Minimized the amount of exported functions/variable with a prefix of: "swiotbl_tbl". - Made the usage of 'int dir' to be 'enum dma_data_direction'. [v5-v6 changes:] - Made the exported functions/variables have the 'swiotlb_bk' prefix. - dropped the checkpatches/other reworks Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Tested-by: Albert Herranz <albert_herranz@yahoo.es>
2010-06-04Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6Linus Torvalds1-0/+3
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6: fix setattr error handling in sysfs, configfs kobject: free memory if netlink_kernel_create() fails lib/kobject_uevent.c: fix CONIG_NET=n warning
2010-06-04lib: add s390 to atomic64_dec_if_positive archsHeiko Carstens1-1/+2
Add s390 to list of architectures that have atomic64_dec_if_positive implemented so we get rid of this warning: lib/atomic64_test.c:129:2: warning: #warning Please implement atomic64_dec_if_positive for your architecture, and add it to the IF above Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Luca Barbieri <luca@luca-barbieri.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-06-04kobject: free memory if netlink_kernel_create() failsDan Carpenter1-0/+1
There is a kfree(ue_sk) missing on the error path if netlink_kernel_create() fails. Signed-off-by: Dan Carpenter <error27@gmail.com> Reviewed-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-06-04lib/kobject_uevent.c: fix CONIG_NET=n warningAndrew Morton1-0/+2
lib/kobject_uevent.c:87: warning: 'kobj_bcast_filter' defined but not used Repairs "hotplug: netns aware uevent_helper" Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-05-30Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds1-0/+1
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, cpufeature: Unbreak compile with gcc 3.x x86, pat: Fix memory leak in free_memtype x86, k8: Fix section mismatch for powernowk8_exit() lib/atomic64_test: fix missing include of linux/kernel.h x86: remove last traces of quicklist usage x86, setup: Phoenix BIOS fixup is needed on Dell Inspiron Mini 1012 x86: "nosmp" command line option should force the system into UP mode arch/x86/pci: use kasprintf x86, apic: ack all pending irqs when crashed/on kexec
2010-05-30Revert "cpusets: randomize node rotor used in cpuset_mem_spread_node()"Linus Torvalds1-1/+1
This reverts commit 0ac0c0d0f837c499afd02a802f9cf52d3027fa3b, which caused cross-architecture build problems for all the wrong reasons. IA64 already added its own version of __node_random(), but the fact is, there is nothing architectural about the function, and the original commit was just badly done. Revert it, since no fix is forthcoming. Requested-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-05-28Merge branch 'release' of ↵Linus Torvalds2-1/+54
git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (27 commits) ACPI: Don't let acpi_pad needlessly mark TSC unstable drivers/acpi/sleep.h: Checkpatch cleanup ACPI: Minor cleanup eliminating redundant PMTIMER_TICKS to NS conversion ACPI: delete unused c-state promotion/demotion data strucutures ACPI: video: fix acpi_backlight=video ACPI: EC: Use kmemdup drivers/acpi: use kasprintf ACPI, APEI, EINJ injection parameters support Add x64 support to debugfs ACPI, APEI, Use ERST for persistent storage of MCE ACPI, APEI, Error Record Serialization Table (ERST) support ACPI, APEI, Generic Hardware Error Source memory error support ACPI, APEI, UEFI Common Platform Error Record (CPER) header Unified UUID/GUID definition ACPI Hardware Error Device (PNP0C33) support ACPI, APEI, PCIE AER, use general HEST table parsing in AER firmware_first setup ACPI, APEI, Document for APEI ACPI, APEI, EINJ support ACPI, APEI, HEST table parsing ACPI, APEI, APEI supporting infrastructure ...
2010-05-27radix-tree: fix radix_tree_prev_hole() underflow caseCesar Eduardo Barros1-2/+2
radix_tree_prev_hole() used LONG_MAX to detect underflow; however, ULONG_MAX is clearly what was intended, both here and by its only user (count_history_pages at mm/readahead.c). Reviewed-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Cesar Eduardo Barros <cesarb@cesarb.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-05-27swiotlb: remove unnecessary swiotlb_sync_single_range_*FUJITA Tomonori1-31/+0
swiotlb_sync_single_range_for_cpu and swiotlb_sync_single_range_for_device are unnecessary because swiotlb_sync_single_for_cpu and swiotlb_sync_single_for_device can be used instead. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-05-27lib/random32: export pseudo-random number generator for modulesJoe Eykholt1-21/+17
This patch moves the definition of struct rnd_state and the inline __seed() function to linux/random.h. It renames the static __random32() function to prandom32() and exports it for use in modules. prandom32() is useful as a privately-seeded pseudo random number generator that can give the same result every time it is initialized. For FCoE FC-BB-6 VN2VN mode self-selected unique FC address generation, we need an pseudo-random number generator seeded with the 64-bit world-wide port name. A truly random generator or one seeded with randomness won't do because the same sequence of numbers should be generated each time we boot or the link comes up. A prandom32_seed() inline function is added to the header file. It is inlined not for speed, but so the function won't be expanded in the base kernel, but only in the module that uses it. Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Acked-by: Matt Mackall <mpm@selenic.com> Cc: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-05-27idr: fix backtrack logic in idr_remove_allImre Deak1-1/+4
Currently idr_remove_all will fail with a use after free error if idr::layers is bigger than 2, which on 32 bit systems corresponds to items more than 1024. This is due to stepping back too many levels during backtracking. For simplicity let's assume that IDR_BITS=1 -> we have 2 nodes at each level below the root node and each leaf node stores two IDs. (In reality for 32 bit systems IDR_BITS=5, with 32 nodes at each sub-root level and 32 IDs in each leaf node). The sequence of freeing the nodes at the moment is as follows: layer 1 -> a(7) 2 -> b(3) c(5) 3 -> d(1) e(2) f(4) g(6) Until step 4 things go fine, but then node c is freed, whereas node g should be freed first. Since node c contains the pointer to node g we'll have a use after free error at step 6. How many levels we step back after visiting the leaf nodes is currently determined by the msb of the id we are currently visiting: Step 1. node d with IDs 0,1 is freed, current ID is advanced to 2. msb of the current ID bit 1. This means we need to step back 1 level to node b and take the next sibling, node e. 2-3. node e with IDs 2,3 is freed, current ID is 4, msb is bit 2. This means we need to step back 2 levels to node a, freeing node b on the way. 4-5. node f with IDs 4,5 is freed, current ID is 6, msb is still bit 2. This means we again need to step back 2 levels to node a and free c on the way. 6. We should visit node g, but its pointer is not available as node c was freed. The fix changes how we determine the number of levels to step back. Instead of deducting this merely from the msb of the current ID, we should really check if advancing the ID causes an overflow to a bit position corresponding to a given layer. In the above example overflow from bit 0 to bit 1 should mean stepping back 1 level. Overflow from bit 1 to bit 2 should mean stepping back 2 levels and so on. The fix was tested with IDs up to 1 << 20, which corresponds to 4 layers on 32 bit systems. Signed-off-by: Imre Deak <imre.deak@nokia.com> Reviewed-by: Tejun Heo <tj@kernel.org> Cc: Eric Paris <eparis@redhat.com> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Cc: <stable@kernel.org> [2.6.34.1] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-05-27fault-injection: add CPU notifier error injection moduleAkinobu Mita3-0/+76
I used this module to test the series of modification to the cpu notifiers code. Example1: inject CPU offline error (-1 == -EPERM) # modprobe cpu-notifier-error-inject cpu_down_prepare_error=-1 # echo 0 > /sys/devices/system/cpu/cpu1/online bash: echo: write error: Operation not permitted Example2: inject CPU online error (-2 == -ENOENT) # modprobe cpu-notifier-error-inject cpu_up_prepare_error=-2 # echo 1 > /sys/devices/system/cpu/cpu1/online bash: echo: write error: No such file or directory [akpm@linux-foundation.org: fix Kconfig help text] Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-05-27cpusets: randomize node rotor used in cpuset_mem_spread_node()Jack Steiner1-1/+1
Some workloads that create a large number of small files tend to assign too many pages to node 0 (multi-node systems). Part of the reason is that the rotor (in cpuset_mem_spread_node()) used to assign nodes starts at node 0 for newly created tasks. This patch changes the rotor to be initialized to a random node number of the cpuset. [akpm@linux-foundation.org: fix layout] [Lee.Schermerhorn@hp.com: Define stub numa_random() for !NUMA configuration] Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Paul Menage <menage@google.com> Cc: Jack Steiner <steiner@sgi.com> Cc: Robin Holt <holt@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>