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2014-12-08tipc: simplify relationship between name table lock and node lockYing Xue
When tipc name sequence is published, name table lock is released before name sequence buffer is delivered to remote nodes through its underlying unicast links. However, when name sequence is withdrawn, the name table lock is held until the transmission of the removal message of name sequence is finished. During the process, node lock is nested in name table lock. To prevent node lock from being nested in name table lock, while withdrawing name, we should adopt the same locking policy of publishing name sequence: name table lock should be released before message is sent. Signed-off-by: Ying Xue <ying.xue@windriver.com> Reviewed-by: Erik Hugne <erik.hugne@ericsson.com> Reviewed-by: Jon Maloy <jon.maloy@ericsson.com> Tested-by: Erik Hugne <erik.hugne@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-12-08tipc: any name table member must be protected under name table lockYing Xue
As tipc_nametbl_lock is used to protect name_table structure, the lock must be held while all members of name_table structure are accessed. However, the lock is not obtained while a member of name_table structure - local_publ_count is read in tipc_nametbl_publish(), as a consequence, an inconsistent value of local_publ_count might be got. Signed-off-by: Ying Xue <ying.xue@windriver.com> Reviewed-by: Erik Hugne <erik.hugne@ericsson.com> Reviewed-by: Jon Maloy <jon.maloy@ericsson.com> Tested-by: Erik Hugne <erik.hugne@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-12-08tipc: ensure all name sequences are properly protected with its lockYing Xue
TIPC internally created a name table which is used to store name sequences. Now there is a read-write lock - tipc_nametbl_lock to protect the table, and each name sequence saved in the table is protected with its private lock. When a name sequence is inserted or removed to or from the table, its members might need to change. Therefore, in normal case, the two locks must be held while TIPC operates the table. However, there are still several places where we only hold tipc_nametbl_lock without proprerly obtaining name sequence lock, which might cause the corruption of name sequence. Signed-off-by: Ying Xue <ying.xue@windriver.com> Reviewed-by: Erik Hugne <erik.hugne@ericsson.com> Reviewed-by: Jon Maloy <jon.maloy@ericsson.com> Tested-by: Erik Hugne <erik.hugne@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-12-08tipc: ensure all name sequences are released when name table is stoppedYing Xue
As TIPC subscriber server is terminated before name table, no user depends on subscription list of name sequence when name table is stopped. Therefore, all name sequences stored in name table should be released whatever their subscriptions lists are empty or not, otherwise, memory leak might happen. Signed-off-by: Ying Xue <ying.xue@windriver.com> Reviewed-by: Erik Hugne <erik.hugne@ericsson.com> Reviewed-by: Jon Maloy <jon.maloy@ericsson.com> Tested-by: Erik Hugne <erik.hugne@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-12-08tipc: make name table allocated dynamicallyYing Xue
Name table locking policy is going to be adjusted from read-write lock protection to RCU lock protection in the future commits. But its essential precondition is to convert the allocation way of name table from static to dynamic mode. Signed-off-by: Ying Xue <ying.xue@windriver.com> Reviewed-by: Erik Hugne <erik.hugne@ericsson.com> Reviewed-by: Jon Maloy <jon.maloy@ericsson.com> Tested-by: Erik Hugne <erik.hugne@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-12-08tipc: remove size variable from publ_list structYing Xue
The size variable is introduced in publ_list struct to help us exactly calculate SKB buffer sizes needed by publications when all publications in name table are delivered in bulk in named_distribute(). But if publication SKB buffer size is assumed to MTU, the size variable in publ_list struct can be completely eliminated at the cost of wasting a bit memory space for last SKB. Signed-off-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: Tero Aho <tero.aho@coriant.com> Reviewed-by: Erik Hugne <erik.hugne@ericsson.com> Reviewed-by: Jon Maloy <jon.maloy@ericsson.com> Tested-by: Erik Hugne <erik.hugne@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-12-08Merge branch 'iov_iter' into for-nextAl Viro
2014-12-08udp: Neaten and reduce size of compute_score functionsJoe Perches
The compute_score functions are a bit difficult to read. Neaten them a bit to reduce object sizes and make them a bit more intelligible. Return early to avoid indentation and avoid unnecessary initializations. (allyesconfig, but w/ -O2 and no profiling) $ size net/ipv[46]/udp.o.* text data bss dec hex filename 28680 1184 25 29889 74c1 net/ipv4/udp.o.new 28756 1184 25 29965 750d net/ipv4/udp.o.old 17600 1010 2 18612 48b4 net/ipv6/udp.o.new 17632 1010 2 18644 48d4 net/ipv6/udp.o.old Signed-off-by: Joe Perches <joe@perches.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-12-08net: bcmgenet: enable driver to work without a device treePetri Gynther
Modify bcmgenet driver so that it can be used on Broadcom 7xxx MIPS-based STB platforms without a device tree. Signed-off-by: Petri Gynther <pgynther@google.com> Acked-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-12-08copy_from_iter_nocache()Al Viro
BTW, do we want memcpy_nocache()? Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-12-08new helper: iov_iter_kvec()Al Viro
initialization of kvec-backed iov_iter Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-12-08csum_and_copy_..._iter()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-12-08hyperv: Add support for vNIC hot removalHaiyang Zhang
This patch adds proper handling of the vNIC hot removal event, which includes a rescind-channel-offer message from the host side that triggers vNIC close and removal. In this case, the notices to the host during close and removal is not necessary because the channel is rescinded. This patch blocks these unnecessary messages, and lets vNIC removal process complete normally. Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Reviewed-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-12-08test: bpf: expand DIV_KX to DIV_MOD_KXDenis Kirjanov
Expand DIV_KX to use BPF_MOD operation in the DIV_KX bpf 'classic' test. CC: Alexei Starovoitov <ast@plumgrid.com> Signed-off-by: Denis Kirjanov <kda@linux-powerpc.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-12-08mips: bpf: Fix broken BPF_MODDenis Kirjanov
Remove optimize_div() from BPF_MOD | BPF_K case since we don't know the dividend and fix the emit_mod() by reading the mod operation result from HI register Signed-off-by: Denis Kirjanov <kda@linux-powerpc.org> Reviewed-by: Markos Chandras <markos.chandras@imgtec.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-12-08Merge branch 'tstamp-next'David S. Miller
Willem de Bruijn says: ==================== timestamping updates The main goal for this patchset is to allow correlating timestamps with the egress interface. Also introduce a warning, as discussed previously, and update the tests to verify the new feature. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2014-12-08net-timestamp: expand documentation and testWillem de Bruijn
Documentation: expand explanation of timestamp counter Test: new: flag -I requests and prints PKTINFO new: flag -x prints payload (possibly truncated) fix: remove pretty print that breaks common flag '-l 1' Signed-off-by: Willem de Bruijn <willemb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-12-08net-timestamp: allow reading recv cmsg on errqueue with origin tstampWillem de Bruijn
Allow reading of timestamps and cmsg at the same time on all relevant socket families. One use is to correlate timestamps with egress device, by asking for cmsg IP_PKTINFO. on AF_INET sockets, call the relevant function (ip_cmsg_recv). To avoid changing legacy expectations, only do so if the caller sets a new timestamping flag SOF_TIMESTAMPING_OPT_CMSG. on AF_INET6 sockets, IPV6_PKTINFO and all other recv cmsg are already returned for all origins. only change is to set ifindex, which is not initialized for all error origins. In both cases, only generate the pktinfo message if an ifindex is known. This is not the case for ACK timestamps. The difference between the protocol families is probably a historical accident as a result of the different conditions for generating cmsg in the relevant ip(v6)_recv_error function: ipv4: if (serr->ee.ee_origin == SO_EE_ORIGIN_ICMP) { ipv6: if (serr->ee.ee_origin != SO_EE_ORIGIN_LOCAL) { At one time, this was the same test bar for the ICMP/ICMP6 distinction. This is no longer true. Signed-off-by: Willem de Bruijn <willemb@google.com> ---- Changes v1 -> v2 large rewrite - integrate with existing pktinfo cmsg generation code - on ipv4: only send with new flag, to maintain legacy behavior - on ipv6: send at most a single pktinfo cmsg - on ipv6: initialize fields if not yet initialized The recv cmsg interfaces are also relevant to the discussion of whether looping packet headers is problematic. For v6, cmsgs that identify many headers are already returned. This patch expands that to v4. If it sounds reasonable, I will follow with patches 1. request timestamps without payload with SOF_TIMESTAMPING_OPT_TSONLY (http://patchwork.ozlabs.org/patch/366967/) 2. sysctl to conditionally drop all timestamps that have payload or cmsg from users without CAP_NET_RAW. Signed-off-by: David S. Miller <davem@davemloft.net>
2014-12-08ipv4: warn once on passing AF_INET6 socket to ip_recv_errorWillem de Bruijn
One line change, in response to catching an occurrence of this bug. See also fix f4713a3dfad0 ("net-timestamp: make tcp_recvmsg call ...") Signed-off-by: Willem de Bruijn <willemb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-12-08iov_iter.c: handle ITER_KVEC directlyAl Viro
... without bothering with copy_..._user() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-12-08f2fs: avoid to ra unneeded blocks in recover flowChao Yu
To improve recovery speed, f2fs try to readahead many contiguous blocks in warm node segment, but for most time, abnormal power-off do not occur frequently, so when mount a normal power-off f2fs image, by contrary ra so many blocks and then invalid them will hurt the performance of mount. It's better to just ra the first next-block for normal condition. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-12-08f2fs: introduce is_valid_blkaddr to cleanup codes in ra_meta_pagesChao Yu
This patch does cleanup work, it introduces is_valid_blkaddr() to include verification code for blkaddr with upper and down boundary value which were in ra_meta_pages previous. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-12-08f2fs: fix to enable readahead for SSA/CP blocksChao Yu
1.We use zero as upper boundary value for ra SSA/CP blocks, we will skip readahead as verification failure with max number, it causes low performance. 2.Low boundary value is not accurate for SSA/CP/POR region verification, so these values need to be redefined. This patch fixes above issues. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-12-08Merge branch 'pm-runtime'Rafael J. Wysocki
* pm-runtime: (25 commits) i2c-omap / PM: Drop CONFIG_PM_RUNTIME from i2c-omap.c dmaengine / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM drivers: sh / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM e1000e / igb / PM: Eliminate CONFIG_PM_RUNTIME MMC / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM MFD / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM misc / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM media / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM input / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM iio / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM hsi / OMAP / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM i2c-hid / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM drm / exynos / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM gpio / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM hwrandom / exynos / PM: Use CONFIG_PM in #ifdef block / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM USB / PM: Drop CONFIG_PM_RUNTIME from the USB core PM: Merge the SET*_RUNTIME_PM_OPS() macros PM / Kconfig: Do not select PM directly from Kconfig files PCI / PM: Drop CONFIG_PM_RUNTIME from the PCI core ...
2014-12-08Merge branch 'pm-cpufreq'Rafael J. Wysocki
* pm-cpufreq: (21 commits) intel_pstate: skip this driver if Sun server has _PPC method cpufreq: arm_big_little: free OPP table created during ->init() imx6q: free OPP table created during ->init() exynos5440: free OPP table created during ->init() cpufreq-dt: free OPP table created during ->init() cpufreq-dt: register cooling device from ->ready() callback cpufreq: Introduce ->ready() callback for cpufreq drivers cpufreq-dt: pass 'policy->related_cpus' to of_cpufreq_cooling_register() cpufreq: Fix formatting issues in 'struct cpufreq_driver' cpufreq: pxa2xx: Add Kconfig entry cpufreq: Ref the policy object sooner cpufreq: Kconfig: Remove architecture specific menu entries cpufreq: pcc: Enable autoload of pcc-cpufreq for ACPI processors intel_pstate: Add CPUID for BDW-H CPU intel_pstate: Add support for HWP x86: Add support for Intel HWP feature detection. cpufreq: respect the min/max settings from user space cpufreq: cpufreq-dt: Handle regulator_get_voltage() failure cpufreq: cpufreq-dt: Improve debug about matching OPP cpufreq: Loongson1: Add cpufreq driver for Loongson1B ...
2014-12-08Merge branch 'pm-cpuidle'Rafael J. Wysocki
* pm-cpuidle: cpuidle: add MAINTAINERS entry for ARM Exynos cpuidle driver drivers: cpuidle: Remove cpuidle-arm64 duplicate error messages drivers: cpuidle: Add idle-state-name description to ARM idle states drivers: cpuidle: Add status property to ARM idle states cpuidle: Invert CPUIDLE_FLAG_TIME_VALID logic
2014-12-08Merge branches 'pm-domains', 'pm-sleep' and 'pm-tools'Rafael J. Wysocki
* pm-domains: ARM: shmobile: Convert to genpd flags for PM clocks for R-mobile ARM: shmobile: Convert to genpd flags for PM clocks for r8a7779 PM / Domains: Initial PM clock support for genpd PM / Domains: Power on the PM domain right after attach completes PM / Domains: Move struct pm_domain_data to pm_domain.h PM / Domains: Extract code to power off/on a PM domain PM / Domains: Make genpd parameter of pm_genpd_present() const * pm-sleep: PM / hibernate: Deletion of an unnecessary check before the function call "vfree" PM / Hibernate: Migrate to ktime_t * pm-tools: tools: cpupower: fix return checks for sysfs_get_idlestate_count()
2014-12-08Merge branch 'master' of ↵John W. Linville
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless
2014-12-08Merge branches 'powercap', 'pm-clk', 'pm-config' and 'pm-opp'Rafael J. Wysocki
* powercap: powercap / RAPL: fix build dependency on iosf_mbi powercap / RAPL: add new model ids powercap / RAPL: handle atom and core differences powercap / RAPL: abstract per cpu type functions * pm-clk: PM / clock_ops: make __pm_clk_enable more generic PM / clock_ops: Add pm_clk_add_clk() * pm-config: PM: Kconfig: fix unmet dependency for CPU_PM * pm-opp: PM / OPP replace kfree_rcu() with call_srcu() in opp_set_availability() PM / OPP Introduce APIs to remove OPPs PM / OPP mark OPPs as 'static' or 'dynamic' PM / OPP don't match for existing OPPs when list is empty PM / OPP rename 'head' as 'rcu_head' or 'srcu_head' based on its type
2014-12-08f2fs: use atomic for counting inode with inline_{dir,inode} flagChao Yu
As inline_{dir,inode} stat is increased/decreased concurrently by multi threads, so the value is not so accurate, let's use atomic type for counting accurately. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-12-08Merge branches 'acpi-video' and 'acpi-pmic'Rafael J. Wysocki
* acpi-video: ACPI / video: Run _BCL before deciding registering backlight * acpi-pmic: ACPI / PMIC: AXP288: support virtual GPIO in ACPI table ACPI / PMIC: support PMIC operation region for XPower AXP288 ACPI / PMIC: support PMIC operation region for CrystalCove iio/axp288_adc: remove THIS_MODULE owner mfd/axp20x: avoid irq numbering collision iio: adc: Add module device table for autoloading iio: adc: Add support for axp288 adc mfd: axp20x: Extend axp20x to support axp288 pmic
2014-12-08Merge back earlier ACPI backlight material for 3.19-rc1.Rafael J. Wysocki
2014-12-08Merge branches 'acpi-scan', 'acpi-pm', 'acpi-lpss' and 'acpi-processor'Rafael J. Wysocki
* acpi-scan: ACPI: Add _DEP support to fix battery issue on Asus T100TA * acpi-pm: ACPI / sleep: Drain outstanding events after disabling multiple GPEs ACPI / PM: Fixed a typo in a comment * acpi-lpss: dmaengine: dw: enable runtime PM ACPI / LPSS: introduce a 'proxy' device to power on LPSS for DMA ACPI / LPSS: allow to use specific PM domain during ->probe() ACPI / LPSS: add all LPSS devices to the specific power domain * acpi-processor: ACPI / cpuidle: avoid assigning signed errno to acpi_status ACPI / processor: remove unused variabled from acpi_processor_power structure ACPI / processor: Update the comments in processor.h
2014-12-08Merge branch 'acpica'Rafael J. Wysocki
* acpica: ACPICA: Events: Always modify GPE registers under the GPE lock ACPICA: Save current masks of enabled GPEs after enable register writes ACPICA: Update version to 20141107. ACPICA: Disassembler: Emit correct string for 0 stop bits. ACPICA: Disassembler: Update for C-style expressions. ACPICA: Disassembler: Add support for C-style operators and expressions. ACPICA: acpiexec: Add option to specify an object initialization file. ACPICA: iASL: Add support for to_PLD macro.
2014-12-08Merge branches 'acpi-config', 'acpi-osl', 'acpi-utils' and 'acpi-tables'Rafael J. Wysocki
* acpi-config: ACPI / Kconfig: Remove redundant depends on ACPI * acpi-osl: ACPI / OSL: Add IRQ handler flushing support in the OSL. ACPI / osl: speedup grace period in acpi_os_map_cleanup * acpi-utils: ACPI: remove unnecessary sizeof(u8) * acpi-tables: ACPI / table: Always count matched and successfully parsed entries ACPI / table: Add new function to get table entries
2014-12-08Merge branch 'device-properties'Rafael J. Wysocki
* device-properties: leds: leds-gpio: Fix multiple instances registration without 'label' property leds: leds-gpio: Fix legacy GPIO number case ACPI / property: Drop size_prop from acpi_dev_get_property_reference() leds: leds-gpio: Convert gpio_blink_set() to use GPIO descriptors ACPI / GPIO: Document ACPI GPIO mappings API net: rfkill: gpio: Add default GPIO driver mappings for ACPI ACPI / GPIO: Driver GPIO mappings for ACPI GPIOs input: gpio_keys_polled: Make use of device property API leds: leds-gpio: Make use of device property API gpio: Support for unified device properties interface Driver core: Unified interface for firmware node properties input: gpio_keys_polled: Add support for GPIO descriptors leds: leds-gpio: Add support for GPIO descriptors gpio: sch: Consolidate core and resume banks gpio / ACPI: Add support for _DSD device properties misc: at25: Make use of device property API ACPI: Allow drivers to match using Device Tree compatible property Driver core: Unified device properties interface for platform firmware ACPI: Add support for device specific properties
2014-12-08f2fs: cleanup path to need cp at fsyncChangman Lee
Added some commentaries for code readability and cleaned up if-statement clearly. Signed-off-by: Changman Lee <cm224.lee@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-12-08f2fs: check if inode state is dirty at fsyncChangman Lee
If inode state is dirty, go straight to write. Suggested-by: Jaegeuk Kim <jaegeuk@kernel.org> Signed-off-by: Changman Lee <cm224.lee@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-12-08f2fs: count the number of inmemory pagesJaegeuk Kim
This patch adds counting # of inmemory pages in the page cache. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-12-08f2fs: release inmemory pages when the file was closedJaegeuk Kim
If file is closed, let's drop inmemory pages. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-12-08f2fs: set page private for inmemory pages for truncationJaegeuk Kim
The inmemory pages should be handled by invalidate_page since it needs to be released int the truncation path. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-12-08f2fs: count inline_xx in do_read_inodeJaegeuk Kim
In do_read_inode, if we failed __recover_inline_status, the inode has inline flag without increasing its count. Later, f2fs_evict_inode will decrease the count, which causes -1. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-12-08f2fs: do retry operations with cond_reschedJaegeuk Kim
This patch revists retrial paths in f2fs. The basic idea is to use cond_resched instead of retrying from the very early stage. Suggested-by: Gu Zheng <guz.fnst@cn.fujitsu.com> Reviewed-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-12-08workqueue: allow rescuer thread to do more work.NeilBrown
When there is serious memory pressure, all workers in a pool could be blocked, and a new thread cannot be created because it requires memory allocation. In this situation a WQ_MEM_RECLAIM workqueue will wake up the rescuer thread to do some work. The rescuer will only handle requests that are already on ->worklist. If max_requests is 1, that means it will handle a single request. The rescuer will be woken again in 100ms to handle another max_requests requests. I've seen a machine (running a 3.0 based "enterprise" kernel) with thousands of requests queued for xfslogd, which has a max_requests of 1, and is needed for retiring all 'xfs' write requests. When one of the worker pools gets into this state, it progresses extremely slowly and possibly never recovers (only waited an hour or two). With this patch we leave a pool_workqueue on mayday list until it is clearly no longer in need of assistance. This allows all requests to be handled in a timely fashion. We keep each pool_workqueue on the mayday list until need_to_create_worker() is false, and no work for this workqueue is found in the pool. I have tested this in combination with a (hackish) patch which forces all work items to be handled by the rescuer thread. In that context it significantly improves performance. A similar patch for a 3.0 kernel significantly improved performance on a heavy work load. Thanks to Jan Kara for some design ideas, and to Dongsu Park for some comments and testing. tj: Inverted the lock order between wq_mayday_lock and pool->lock with a preceding patch and simplified this patch. Added comment and updated changelog accordingly. Dongsu spotted missing get_pwq() in the simplified code. Cc: Dongsu Park <dongsu.park@profitbricks.com> Cc: Jan Kara <jack@suse.cz> Cc: Lai Jiangshan <laijs@cn.fujitsu.com> Signed-off-by: NeilBrown <neilb@suse.de> Signed-off-by: Tejun Heo <tj@kernel.org>
2014-12-08workqueue: invert the order between pool->lock and wq_mayday_lockTejun Heo
Currently, pool->lock nests inside pool->lock. There's no inherent reason for this order. The only place where the two locks are held together is pool_mayday_timeout() and it just got decided that way. This nesting order turns out to complicate things with the planned rescuer_thread() update. Let's invert them. This doesn't cause any behavior differences. Signed-off-by: Tejun Heo <tj@kernel.org> Reviewed-by: Lai Jiangshan <laijs@cn.fujitsu.com> Cc: NeilBrown <neilb@suse.de> Cc: Dongsu Park <dongsu.park@profitbricks.com>
2014-12-08Merge branch 'at91/cleanup5' into next/driversArnd Bergmann
The at91 cleanups changed a lot of files, this merges in the latest cleanups to resolve the conflicts Conflicts: arch/arm/mach-at91/at91sam9260.c arch/arm/mach-at91/at91sam9261.c arch/arm/mach-at91/at91sam9263.c arch/arm/mach-at91/clock.c arch/arm/mach-at91/clock.h drivers/rtc/Kconfig Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2014-12-08Merge branch 'brcm/stb-smp-uart' into next/driversArnd Bergmann
This resolves a nonobvious merge conflict that I got wrong the first time. * brcm/stb-smp-uart: bus: brcmstb_gisb: save and restore GISB timeout bus: brcmstb_gisb: register the fault code hook ARM: brcmstb: Kconfig: drop unneeded symbol selections ARM: brcmstb: reintroduce SMP support ARM: brcmstb: add debug UART for earlyprintk support Conflicts: drivers/bus/brcmstb_gisb.c Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reported-by: Florian Fainelli <f.fainelli@gmail.com>
2014-12-08blk-mq: re-check for available tags after running the hardware queueJens Axboe
If we run out of tags and have to sleep, we run the hardware queue to kick pending IO into gear. During that run, we may have completed requests, so re-check if we have free tags before going to sleep. Signed-off-by: Jens Axboe <axboe@fb.com>
2014-12-08blk-mq: fix hang in bt_get()Bart Van Assche
Avoid that if there are fewer hardware queues than CPU threads that bt_get() can hang. The symptoms of the hang were as follows: * All tags allocated for a particular hardware queue. * (nr_tags) pending commands for that hardware queue. * No pending commands for the software queues associated with that hardware queue. Signed-off-by: Jens Axboe <axboe@fb.com>
2014-12-08Merge remote-tracking branch 'scsi-queue/drivers-for-3.19' into for-linusJames Bottomley
Conflicts: drivers/scsi/scsi_debug.c Agreed and tested resolution to a merge problem between a fix in scsi_debug and a driver update Signed-off-by: James Bottomley <JBottomley@Parallels.com>
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