- 14 Apr, 2015 36 commits
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Ulrich Obergfell authored
Three of four handlers for the watchdog parameters in /proc/sys/kernel essentially have to do the same thing. if the parameter is being read { return the state of the corresponding bit(s) in 'watchdog_enabled' } else { set/clear the state of the corresponding bit(s) in 'watchdog_enabled' update the run state of the lockup detector(s) } Hence, introduce a common function that can be called by those handlers. The callers pass a 'bit mask' to this function to indicate which bit(s) should be set/cleared in 'watchdog_enabled'. This function handles an uncommon race with watchdog_nmi_enable() where a concurrent update of 'watchdog_enabled' is possible. We use 'cmpxchg' to detect the concurrency. [This avoids introducing a new spinlock or a mutex to synchronize updates of 'watchdog_enabled'. Using the same lock or mutex in watchdog thread context and in system call context needs to be considered carefully because it can make the code prone to deadlock situations in connection with parking/unparking the watchdog threads.] Signed-off-by:Ulrich Obergfell <uobergfe@redhat.com> Signed-off-by:
Don Zickus <dzickus@redhat.com> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Ulrich Obergfell authored
This series removes proc_dowatchdog(). Since multiple new functions need the 'watchdog_proc_mutex' to serialize access to the watchdog parameters in /proc/sys/kernel, move the mutex outside of any function. Signed-off-by:
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Ulrich Obergfell authored
This series introduces a separate handler for each watchdog parameter in /proc/sys/kernel. The separate handlers need a common function that they can call to update the run state of the lockup detectors, or to have the lockup detectors use a new sample period. Signed-off-by:
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Ulrich Obergfell authored
The hardlockup and softockup had always been tied together. Due to the request of KVM folks, they had a need to have one enabled but not the other. Internally rework the code to split things apart more cleanly. There is a bunch of churn here, but the end result should be code that should be easier to maintain and fix without knowing the internals of what is going on. This patch (of 9): Introduce new definitions and variables to separate the user interface in /proc/sys/kernel from the internal run state of the lockup detectors. The internal run state is represented by two bits in a new variable that is named 'watchdog_enabled'. This helps simplify the code, for example: - In order to check if any of the two lockup detectors is enabled, it is sufficient to check if 'watchdog_enabled' is not zero. - In order to enable/disable one or both lockup detectors, it is sufficient to set/clear one or both bits in 'watchdog_enabled'. - Concurrent updates of 'watchdog_enabled' need not be synchronized via a spinlock or a mutex. Updates can either be atomic or concurrency can be detected by using 'cmpxchg'. Signed-off-by:
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Andrew Morton authored
ocfs2 does mlog_errno(v); return v; in many places. Change mlog_errno() so we can do return mlog_errno(v); For some weird reason this patch reduces the size of ocfs2 by 6k: akpm3:/usr/src/25> size fs/ocfs2/ocfs2.ko text data bss dec hex filename 1146613 82767 832192 2061572 1f7504 fs/ocfs2/ocfs2.ko-before 1140857 82767 832192 2055816 1f5e88 fs/ocfs2/ocfs2.ko-after [dan.carpenter@oracle.com: double evaluation concerns in mlog_errno()] Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: alex chen <alex.chen@huawei.com> Signed-off-by:Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by:
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alex chen authored
If ocfs2 lockres has not been initialized before calling ocfs2_dlm_lock, the lock won't be dropped and then will lead umount hung. The case is described below: ocfs2_mknod ocfs2_mknod_locked __ocfs2_mknod_locked ocfs2_journal_access_di Failed because of -ENOMEM or other reasons, the inode lockres has not been initialized yet. iput(inode) ocfs2_evict_inode ocfs2_delete_inode ocfs2_inode_lock ocfs2_inode_lock_full_nested __ocfs2_cluster_lock Succeeds and allocates a new dlm lockres. ocfs2_clear_inode ocfs2_open_unlock ocfs2_drop_inode_locks ocfs2_drop_lock Since lockres has not been initialized, the lock can't be dropped and the lockres can't be migrated, thus umount will hang forever. Signed-off-by:Alex Chen <alex.chen@huawei.com> Reviewed-by:
Joseph Qi <joseph.qi@huawei.com> Reviewed-by:
joyce.xue <xuejiufei@huawei.com> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Signed-off-by:
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Joe Perches authored
Use the vsprintf %pV extension to avoid using a static buffer and remove the now unnecessary buffer. Signed-off-by:
Joe Perches <joe@perches.com> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Signed-off-by:
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Chengyu Song authored
debugfs_create_dir and debugfs_create_file may return -ENODEV when debugfs is not configured, so the return value should be checked against ERROR_VALUE as well, otherwise the later dereference of the dentry pointer would crash the kernel. This patch tries to solve this problem by fixing certain checks. However, I have that found other call sites are protected by #ifdef CONFIG_DEBUG_FS. In current implementation, if CONFIG_DEBUG_FS is defined, then the above two functions will never return any ERROR_VALUE. So another possibility to fix this is to surround all the buggy checks/functions with the same #ifdef CONFIG_DEBUG_FS. But I'm not sure if this would break any functionality, as only OCFS2_FS_STATS declares dependency on DEBUG_FS. Signed-off-by:
Chengyu Song <csong84@gatech.edu> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Signed-off-by:
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Jakub Wilk authored
Signed-off-by:
Jakub Wilk <jwilk@jwilk.net> Reviewed-by:
Eric Ren <zren@suse.com> Signed-off-by:
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Joseph Qi authored
In ocfs2_local_alloc_find_clear_bits and ocfs2_get_dentry, variable numfound and set may be uninitialized and then used in tracepoint. In ocfs2_xattr_block_get and ocfs2_delete_xattr_in_bucket, variable block_off and xv may be uninitialized and then used in the following logic due to unchecked return value. This patch fixes these possible issues. Signed-off-by:
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Daeseok Youn authored
Signed-off-by:
Daeseok Youn <daeseok.youn@gmail.com> Reviewed-by:
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Joseph Qi authored
ocfs2_block_group_clear_bits will clear bits in block group bitmap. Once it succeeds but fails in the following step, it will cause block group bitmap mismatch the corresponding count recorded in dinode. So rollback the cleared bits if error occurs. Signed-off-by:
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Joseph Qi authored
When ocfs2_get_system_file_inode fails, it is obscure to set the return value to -EEXIST. So change it to -ENOENT. Signed-off-by:
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Joseph Qi authored
If the namelen is 20 and name only has actual length 16, it will fail in ocfs2_find_entry because of mismatch. So use actual name length when find entry. Signed-off-by:
Yiwen Jiang <jiangyiwen@huawei.com> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Signed-off-by:
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Dan Carpenter authored
The code at the "out" label assumes that "default_acl" and "acl" are NULL, but actually the pointers can be NULL, unitialized, or freed. Signed-off-by:
Mark Fasheh <mfasheh@suse.de> Cc: Joel Becker <jlbec@evilplan.org> Signed-off-by:
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Joseph Qi authored
In ocfs2_reserve_local_alloc_bits, it calls ocfs2_error if local alloc inode bitmap used bits mismatch, but the log mistakes it as free bits. Signed-off-by:
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Joseph Qi authored
In ocfs2_direct_IO_write, we use ocfs2_zero_extend to zero allocated clusters in case of cluster not aligned. But ocfs2_zero_extend uses page cache, this may happen that it clears the data which blockdev_direct_IO has already written. We should use blkdev_issue_zeroout instead of ocfs2_zero_extend during direct IO. So fix this issue by introducing ocfs2_direct_IO_zero_extend and ocfs2_direct_IO_extend_no_holes. Reported-by:
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Joseph Qi authored
We need take inode lock when calling ocfs2_get_clusters. And use GFP_NOFS instead of GFP_KERNEL. Signed-off-by:
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Joseph Qi authored
Since di_bh won't be used when zeroing extend, set it to NULL. Signed-off-by:
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Joseph Qi authored
Only when direct IO succeeds we need consider zeroing out in case of cluster not aligned. Signed-off-by:
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Daeseok Youn authored
Fix an off-by-one when attempting to avoid an msleep() on the final loop iteration. Signed-off-by:
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Markus Elfring authored
kfree() was called by user_cluster_connect() even if a previous call of the kzalloc() function failed. Return from this implementation directly after failure detection. Signed-off-by:
Markus Elfring <elfring@users.sourceforge.net> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Signed-off-by:
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Markus Elfring authored
__ocfs2_free_slot_info() was called by ocfs2_init_slot_info() even if a call of the kzalloc() function failed. Return from this implementation directly after corresponding exception handling. Signed-off-by:
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Markus Elfring authored
ocfs2_free_path() was called by ocfs2_merge_rec_right() even if a call of the ocfs2_get_right_path() function failed. Return from this implementation directly after corresponding exception handling. Signed-off-by:
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Markus Elfring authored
ocfs2_free_path() was called by ocfs2_merge_rec_left() even if a call of the ocfs2_get_left_path() function failed. Return from this implementation directly after corresponding exception handling. Signed-off-by:
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Markus Elfring authored
ocfs2_free_path() was called in some cases by ocfs2_figure_merge_contig_type() during error handling even if the passed variables "left_path" and "right_path" contained still a null pointer. Corresponding implementation details could be improved by adjustments for jump labels according to the current Linux coding style convention. Signed-off-by:
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Markus Elfring authored
kfree() was called in a few cases by ocfs2_convert_inline_data_to_extents() during error handling even if the passed variable "pages" contained a null pointer. * Return from this implementation directly after failure detection for the function call "kcalloc". * Corresponding details could be improved by the introduction of another jump label. Signed-off-by:
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Markus Elfring authored
kfree(), ocfs2_free_path() and __ocfs2_free_slot_info() test whether their argument is NULL and then return immediately. Thus the test around their calls is not needed. This issue was detected by using the Coccinelle software. Signed-off-by:
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David Rientjes authored
Mempools created for slab caches should use mempool_create_slab_pool(). Signed-off-by:
David Rientjes <rientjes@google.com> Signed-off-by:
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David Rientjes authored
dwarf_reg_pool and dwarf_frame_pool are not properly destroyed when cleaning up the dwarf unwinder. Destroy them with mempool_destroy(). Also mark dwarf_unwinder_cleanup() as __init. Signed-off-by:
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Fabian Frederick authored
if()/BUG conversion to BUG_ON must be avoided when there's side effect in condition. The reason being BUG_ON won't execute the condition when CONFIG_BUG is not defined. With inspiration from Bruce Fields. Signed-off-by:
Fabian Frederick <fabf@skynet.be> Suggested-by:
Julia Lawall <Julia.Lawall@lip6.fr> Acked-by:
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Gerald Schaefer authored
Commit 61f77eda ("mm/hugetlb: reduce arch dependent code around follow_huge_*") broke follow_huge_pmd() on s390, where pmd and pte layout differ and using pte_page() on a huge pmd will return wrong results. Using pmd_page() instead fixes this. All architectures that were touched by that commit have pmd_page() defined, so this should not break anything on other architectures. Fixes: 61f77eda "mm/hugetlb: reduce arch dependent code around follow_huge_*" Signed-off-by:
Gerald Schaefer <gerald.schaefer@de.ibm.com> Acked-by:
Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Hugh Dickins <hughd@google.com> Cc: Michal Hocko <mhocko@suse.cz>, Andrea Arcangeli <aarcange@redhat.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Acked-by:
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Krzysztof Kozlowski authored
Commit 297d716f ("power_supply: Change ownership from driver to core") inverted the logic in battery_notify(). As an effect already present battery was re-added on each system suspend or hibernation. WARNING: CPU: 0 PID: 303 at ../fs/sysfs/dir.c:31 sysfs_warn_dup+0x68/0x80() sysfs: cannot create duplicate filename '/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/PNP0C0A:00/power_supply/BAT0' CPU: 0 PID: 303 Comm: rtcwake Not tainted 4.0.0-ARCH-02621-g07e6253af953 #48 Call Trace: sysfs_create_dir_ns+0x8d/0xa0 kobject_add_internal+0xb6/0x370 kobject_add+0x6f/0xd0 device_add+0x120/0x6c0 __power_supply_register+0x145/0x290 power_supply_register_no_ws+0x10/0x20 sysfs_add_battery+0x84/0xc5 [battery] battery_notify+0x45/0x6b [battery] notifier_call_chain+0x4f/0x80 __blocking_notifier_call_chain+0x4b/0x70 blocking_notifier_call_chain+0x16/0x20 pm_notifier_call_chain+0x1a/0x40 pm_suspend+0x3ed/0x4e0 Signed-off-by:
Krzysztof Kozlowski <k.kozlowski.k@gmail.com> Reported-by:
Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-By:
Sebastian Reichel <sre@kernel.org> Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/stagingLinus Torvalds authored
Pull staging driver updates from Greg KH: "Here's the big staging driver patchset for 4.1-rc1. There's a lot of patches here, the Outreachy application period happened during this development cycle, so that means that there was a lot of cleanup patches accepted. Other than the normal coding style and sparse fixes here, there are some driver updates and work toward making some of the drivers into "mergable" shape (like the Unisys drivers.) All of these have been in linux-next for a while" * tag 'staging-4.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (1214 commits) staging: lustre: orthography & coding style staging: lustre: lnet: lnet: fix error return code staging: lustre: fix sparse warning Revert "Staging: sm750fb: Fix C99 Comments" Staging: rtl8192u: use correct array for debug output staging: rtl8192e: Remove dead code staging: rtl8192e: Comment cleanup (style/format) staging: rtl8192e: Fix indentation in rtllib_rx_auth_resp() staging: rtl8192e: Decrease nesting of rtllib_rx_auth_resp() staging: rtl8192e: Divide rtllib_rx_auth() staging: rtl8192e: Fix PRINTK_WITHOUT_KERN_LEVEL warnings staging: rtl8192e: Fix DO_WHILE_MACRO_WITH_TRAILING_SEMICOLON warning staging: rtl8192e: Fix BRACES warning staging: rtl8192e: Fix LINE_CONTINUATIONS warning staging: rtl8192e: Fix UNNECESSARY_PARENTHESES warnings staging: rtl8192e: remove unused EXPORT_SYMBOL_RSL macro staging: rtl8192e: Fix RETURN_VOID warnings staging: rtl8192e: Fix UNNECESSARY_ELSE warning staging: rtl8723au: Remove unneeded comments staging: rtl8723au: Use __func__ in trace logs ...
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-coreLinus Torvalds authored
Pull driver core updates from Greg KH: "Here's the driver-core / kobject / lz4 tree update for 4.1-rc1. Everything here has been in linux-next for a while with no reported issues. It's mostly just coding style cleanups, with other minor changes in here as well, nothing big" * tag 'driver-core-4.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (32 commits) debugfs: allow bad parent pointers to be passed in stable_kernel_rules: Add clause about specification of kernel versions to patch. kobject: WARN as tip when call kobject_get() to a kobject not initialized lib/lz4: Pull out constant tables drivers: platform: parse IRQ flags from resources driver core: Make probe deferral more quiet drivers/core/of: Add symlink to device-tree from devices with an OF node device: Add dev_of_node() accessor drivers: base: fw: fix ret value when loading fw firmware: Avoid manual device_create_file() calls drivers/base: cacheinfo: validate device node for all the caches drivers/base: use tabs where possible in code indentation driver core: add missing blank line after declaration drivers: base: node: Delete space after pointer declaration drivers: base: memory: Use tabs instead of spaces firmware_class: Fix whitespace and indentation drivers: base: dma-mapping: Erase blank space after pointer drivers: base: class: Add a blank line after declarations attribute_container: fix missing blank lines after declarations drivers: base: memory: Fix switch indent ...
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usbLinus Torvalds authored
Pull USB driver updates from Greg KH: "Here's the big USB (and PHY) driver patchset for 4.1-rc1. Everything here has been in linux-next, and the full details are below in the shortlog. Nothing major, just the normal round of new drivers,api updates, and other changes, mostly in the USB gadget area, as usual" * tag 'usb-4.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (252 commits) drivers/usb/core: devio.c: Removed an uneeded space before tab usb: dwc2: host: sleep USB_RESUME_TIMEOUT during resume usb: chipidea: debug: add low power mode check before print registers usb: chipidea: udc: bypass pullup DP when gadget connect in OTG fsm mode usb: core: hub: use new USB_RESUME_TIMEOUT usb: isp1760: hcd: use new USB_RESUME_TIMEOUT usb: dwc2: hcd: use new USB_RESUME_TIMEOUT usb: host: sl811: use new USB_RESUME_TIMEOUT usb: host: r8a66597: use new USB_RESUME_TIMEOUT usb: host: oxu210hp: use new USB_RESUME_TIMEOUT usb: host: fusbh200: use new USB_RESUME_TIMEOUT usb: host: fotg210: use new USB_RESUME_TIMEOUT usb: host: isp116x: use new USB_RESUME_TIMEOUT usb: musb: use new USB_RESUME_TIMEOUT usb: host: uhci: use new USB_RESUME_TIMEOUT usb: host: ehci: use new USB_RESUME_TIMEOUT usb: host: xhci: use new USB_RESUME_TIMEOUT usb: define a generic USB_RESUME_TIMEOUT macro usb: musb: dsps: fix build on i386 when COMPILE_TEST is set ehci-hub: use USB_DT_HUB ...
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- 13 Apr, 2015 4 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroupLinus Torvalds authored
Pull cgroup updates from Tejun Heo: "Nothing too interesting. Rik made cpuset cooperate better with isolcpus and there are several other cleanup patches" * 'for-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup: cpuset, isolcpus: document relationship between cpusets & isolcpus cpusets, isolcpus: exclude isolcpus from load balancing in cpusets sched, isolcpu: make cpu_isolated_map visible outside scheduler cpuset: initialize cpuset a bit early cgroup: Use kvfree in pidlist_free() cgroup: call cgroup_subsys->bind on cgroup subsys initialization
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git://git.kernel.org/pub/scm/linux/kernel/git/tj/libataLinus Torvalds authored
Pull libata updates from Tejun Heo: - Hannes's patchset implements support for better error reporting introduced by the new ATA command spec. - the deperecated pci_ dma API usages have been replaced by dma_ ones. - a bunch of hardware specific updates and some cleanups. * 'for-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata: ata: remove deprecated use of pci api ahci: st: st_configure_oob must be called after IP is clocked. ahci: st: Update the ahci_st DT documentation ahci: st: Update the DT example for how to obtain the PHY. sata_dwc_460ex: indent an if statement libata: Add tracepoints libata-eh: Set 'information' field for autosense libata: Implement support for sense data reporting libata: Implement NCQ autosense libata: use status bit definitions in ata_dump_status() ide,ata: Rename ATA_IDX to ATA_SENSE libata: whitespace fixes in ata_to_sense_error() libata: whitespace cleanup in ata_get_cmd_descript() libata: use READ_LOG_DMA_EXT libata: remove ATA_FLAG_LOWTAG sata_dwc_460ex: re-use hsdev->dev instead of dwc_dev sata_dwc_460ex: move to generic DMA driver sata_dwc_460ex: join messages back sata: xgene: add ACPI support for APM X-Gene SATA ports ata: sata_mv: add proper definitions for LP_PHY_CTL register values
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git://git.kernel.org/pub/scm/linux/kernel/git/tj/wqLinus Torvalds authored
Pull workqueue updates from Tejun Heo: "Workqueue now prints debug information at the end of sysrq-t which should be helpful when tracking down suspected workqueue stalls. It only prints out the ones with something currently going on so it shouldn't add much output in most cases" * 'for-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq: workqueue: Reorder sysfs code percpu: Fix trivial typos in comments workqueue: dump workqueues on sysrq-t workqueue: keep track of the flushing task and pool manager workqueue: make the workqueues list RCU walkable
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull irq core updates from Thomas Gleixner: "Managerial summary: Core code: - final removal of IRQF_DISABLED - new state save/restore functions for virtualization support - wakeup support for stacked irqdomains - new function to solve the netpoll synchronization problem irqchips: - new driver for STi based devices - new driver for Vybrid MSCM - massive cleanup of the GIC driver by moving the GIC-addons to stacked irqdomains - the usual pile of fixes and updates to the various chip drivers" * 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (44 commits) irqchip: GICv3: Add support for irq_[get, set]_irqchip_state() irqchip: GIC: Add support for irq_[get, set]_irqchip_state() genirq: Allow the irqchip state of an IRQ to be save/restored genirq: MSI: Fix freeing of unallocated MSI irqchip: renesas-irqc: Add wake-up support irqchip: armada-370-xp: Allow using wakeup source irqchip: mips-gic: Add new functions to start/stop the GIC counter irqchip: tegra: Add Tegra210 support irqchip: digicolor: Move digicolor_set_gc to init section irqchip: renesas-irqc: Add functional clock to bindings irqchip: renesas-irqc: Add minimal runtime PM support irqchip: renesas-irqc: Add more register documentation DT: exynos: update PMU binding ARM: exynos4/5: convert pmu wakeup to stacked domains irqchip: gic: Don't complain in gic_get_cpumask() if UP system ARM: zynq: switch from gic_arch_extn to gic_set_irqchip_flags ARM: ux500: switch from gic_arch_extn to gic_set_irqchip_flags ARM: shmobile: remove use of gic_arch_extn.irq_set_wake irqchip: gic: Add an entry point to set up irqchip flags ARM: omap: convert wakeupgen to stacked domains ...
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