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2016-08-05Merge tag 'usb-4.8-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb Pull more USB updates from Greg KH: "Here are a few more straggler patches for USB for 4.8-rc1. Most of these are for the usb-serial driver tree. All of those have been in linux-next for a long time, but missed my previous pull request to you. The remaining change is to fix up a staging tree build error, due to some USB gadget driver changes that went in. I put it in this tree as it was for a USB driver and people are reporting the build error on your tree. All of these have been in linux-next for this week, and longer for the usb-serial changes" * tag 'usb-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: staging: emxx_udc: allow modular build USB: serial: use variable for status USB: serial: option: add support for Telit LE910 PID 0x1206 USB: serial: cp210x: use kmemdup USB: serial: ti_usb_3410_5052: use functions rather than macros USB: serial: ti_usb_3410_5052: remove ti_usb_3410_5052.h USB: serial: ti_usb_3410_5052: use __packed USB: serial: ti_usb_3410_5052: remove useless comments
2016-08-05ramoops: use persistent_ram_free() instead of kfree() for freeing przHiraku Toyooka
persistent_ram_zone(=prz) structures are allocated by persistent_ram_new(), which includes vmap() or ioremap(). But they are currently freed by kfree(). This uses persistent_ram_free() for correct this asymmetry usage. Signed-off-by: Hiraku Toyooka <hiraku.toyooka.gu@hitachi.com> Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.kw@hitachi.com> Cc: Mark Salyzyn <salyzyn@android.com> Cc: Seiji Aguchi <seiji.aguchi.tr@hitachi.com> Signed-off-by: Kees Cook <keescook@chromium.org>
2016-08-05ramoops: use DT reserved-memory bindingsKees Cook
Instead of a ramoops-specific node, use a child node of /reserved-memory. This requires that of_platform_device_create() be explicitly called for the node, though, since "/reserved-memory" does not have its own "compatible" property. Suggested-by: Rob Herring <robh@kernel.org> Signed-off-by: Kees Cook <keescook@chromium.org> Acked-by: Rob Herring <robh@kernel.org>
2016-08-05NTB: ntb_hw_intel: use local variable pdevAllen Hubbe
Clean up duplicated expression by replacing it with the equivalent local variable pdev. Signed-off-by: Allen Hubbe <Allen.Hubbe@emc.com> Acked-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
2016-08-05NTB: ntb_hw_intel: show BAR size in debugfs infoAllen Hubbe
It will be useful to know the hardware configured BAR size to diagnose issues with NTB memory windows. Signed-off-by: Allen Hubbe <Allen.Hubbe@emc.com> Acked-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
2016-08-05ntb_test: Add a selftest script for the NTB subsystemLogan Gunthorpe
This script automates testing doorbells, scratchpads and memory windows for an NTB device. It can be run locally, with the NTB looped back to the same host or use SSH to remotely control the second host. In the single host case, the script just needs to be passed two arguments: a PCI ID for each side of the link. In the two host case the -r option must be used to specify the remote hostname (which must be SSH accessible and should probably have ssh-keys exchanged). A sample run looks like this: $ sudo ./ntb_test.sh 0000:03:00.1 0000:83:00.1 -p 29 Starting ntb_tool tests... Running link tests on: 0000:03:00.1 / 0000:83:00.1 Passed Running link tests on: 0000:83:00.1 / 0000:03:00.1 Passed Running db tests on: 0000:03:00.1 / 0000:83:00.1 Passed Running db tests on: 0000:83:00.1 / 0000:03:00.1 Passed Running spad tests on: 0000:03:00.1 / 0000:83:00.1 Passed Running spad tests on: 0000:83:00.1 / 0000:03:00.1 Passed Running mw0 tests on: 0000:03:00.1 / 0000:83:00.1 Passed Running mw0 tests on: 0000:83:00.1 / 0000:03:00.1 Passed Running mw1 tests on: 0000:03:00.1 / 0000:83:00.1 Passed Running mw1 tests on: 0000:83:00.1 / 0000:03:00.1 Passed Starting ntb_pingpong tests... Running ping pong tests on: 0000:03:00.1 / 0000:83:00.1 Passed Starting ntb_perf tests... Running local perf test without DMA 0: copied 536870912 bytes in 164453 usecs, 3264 MBytes/s Passed Running remote perf test without DMA 0: copied 536870912 bytes in 164453 usecs, 3264 MBytes/s Passed Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Acked-by: Shuah Khan <shuahkh@osg.samsung.com> Acked-by: Allen Hubbe <Allen.Hubbe@emc.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
2016-08-05ntb_perf: clear link_is_up flag when the link goes down.Logan Gunthorpe
When the link goes down, the link_is_up flag did not return to false. This could have caused some subtle corner case bugs when the link goes up and down quickly. Once that was fixed, there was found to be a race if the link was brought down then immediately up. The link_cleanup work would occasionally be scheduled after the next link up event. This would cancel the link_work that was supposed to occur and leave ntb_perf in an unusable state. To fix this we get rid of the link_cleanup work and put the actions directly in the link_down event. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Acked-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
2016-08-05ntb_pingpong: Add a debugfs file to get the ping countLogan Gunthorpe
This commit adds a debugfs 'count' file to ntb_pingpong. This is so testing with ntb_pingpong can be automated beyond just checking the logs for pong messages. The count file returns a number which increments every pong. The counter can be cleared by writing a zero. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Acked-by: Allen Hubbe <Allen.Hubbe@emc.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
2016-08-05ntb_tool: Add link status and files to debugfsLogan Gunthorpe
In order to more successfully script with ntb_tool it's useful to have a link file to check the link status so that the script doesn't use the other files until the link is up. This commit adds a 'link' file to the debugfs directory which reads boolean (Y or N) depending on the link status. Writing to the file change the link state using ntb_link_enable or ntb_link_disable. A 'link_event' file is also provided so an application can block until the link changes to the desired state. If the user writes a 1, it will block until the link is up. If the user writes a 0, it will block until the link is down. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Acked-by: Allen Hubbe <Allen.Hubbe@emc.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
2016-08-05ntb_tool: Postpone memory window initialization for the userLogan Gunthorpe
In order to make the interface closer to the raw NTB API, this commit changes memory windows so they are not initialized on link up. Instead, the 'peer_trans*' debugfs files are introduced. When read, they return information provided by ntb_mw_get_range. When written, they create a buffer and initialize the memory window. The value written is taken as the requested size of the buffer (which is then rounded for alignment). Writing a value of zero frees the buffer and tears down the memory window translation. The 'peer_mw*' file is only created once the memory window translation is setup by the user. Additionally, it was noticed that the read and write functions for the 'peer_mw*' files should have checked for a NULL pointer. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Acked-by: Allen Hubbe <Allen.Hubbe@emc.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
2016-08-05ntb_perf: Wait for link before running testLogan Gunthorpe
Instead of returning immediately with an error when the link is down, wait for the link to come up (or the user sends a SIGINT). This is to make scripting ntb_perf easier. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Acked-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
2016-08-05ntb_perf: Return results by reading the run fileLogan Gunthorpe
Instead of having to watch logs, allow the results to be retrieved by reading back the run file. This file will return "running" when the test is running and nothing if no tests have been run yet. It returns 1 line per thread, and will display an error message if the corresponding thread returns an error. With the above change, the pr_info calls that returned the results are then changed to pr_debug calls. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Acked-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
2016-08-05ntb_perf: Improve thread handling to increase robustnessLogan Gunthorpe
This commit accomplishes a few things: 1) Properly prevent multiple sets of threads from running at once using a mutex. Lots of race issues existed with the thread_cleanup. 2) The mutex allows us to ensure that threads are finished before tearing down the device or module. 3) Don't use kthread_stop when the threads can exit by themselves, as this is counter-indicated by the kthread_create documentation. Threads now wait for kthread_stop to occur. 4) Writing to the run file now blocks until the threads are complete. The test can then be safely interrupted by a SIGINT. Also, while I was at it: 5) debugfs_run_write shouldn't return 0 in the early check cases as this could cause debugfs_run_write to loop undesirably. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Acked-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
2016-08-05ntb_perf: Schedule based on time not on performanceLogan Gunthorpe
When debugging performance problems, if some issue causes the ntb hardware to be significantly slower than expected, ntb_perf will hang requiring a reboot because it only schedules once every 4GB. Instead, schedule based on jiffies so it will not hang the CPU if the transfer is slow. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Acked-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
2016-08-05ntb_transport: Check the number of spads the hardware supportsLogan Gunthorpe
I'm working on hardware that currently has a limited number of scratchpad registers and ntb_ndev fails with no clue as to why. I feel it is better to fail early and provide a reasonable error message then to fail later on. The same is done to ntb_perf, but it doesn't currently require enough spads to actually fail. I've also removed the unused SPAD_MSG and SPAD_ACK enums so that MAX_SPAD accurately reflects the number of spads used. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Acked-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
2016-08-05ntb_tool: Add memory window debug supportLogan Gunthorpe
We allocate some memory window buffers when the link comes up, then we provide debugfs files to read/write each side of the link. This is useful for debugging the mapping when writing new drivers. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Acked-by: Allen Hubbe <Allen.Hubbe@emc.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
2016-08-05ntb_perf: Allow limiting the size of the memory windowsLogan Gunthorpe
On my system, dma_alloc_coherent won't produce memory anywhere near the size of the BAR. So I needed a way to limit this. It's pretty much copied straight from ntb_transport. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Acked-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
2016-08-05NTB: allocate number transport entries depending on size of ring sizeDave Jiang
Currently we only allocate a fixed default number of descriptors for the tx and rx side. We should dynamically resize it to the number of descriptors resides in the transport rings. We should know the number of transmit descriptors at initializaiton. We will allocate the default number of descriptors for receive side and allocate additional ones when we know the actual max entries for receive. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Acked-by: Allen Hubbe <allen.hubbe@emc.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
2016-08-05ntb_tool: BUG: Ensure the buffer size is large enough to return all spadsLogan Gunthorpe
On hardware with 32 scratchpad registers the spad field in ntb tool could chop off the end. The maximum buffer size is increased from 256 to 15 times the number or scratchpads. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Acked-by: Allen Hubbe <Allen.Hubbe@emc.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
2016-08-05ntb_tool: Fix infinite loop bug when writing spad/peer_spad fileLogan Gunthorpe
If you tried to write two spads in one line, as per the example: root@peer# echo '0 0x01010101 1 0x7f7f7f7f' > $DBG_DIR/peer_spad then the CPU would freeze in an infinite loop. This wasn't immediately obvious but 'pos' was not incrementing the buffer, so after reading the second pair of values, 'pos' would once again be 3 and it would re-read the second pair of values ad infinitum. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Acked-by: Allen Hubbe <Allen.Hubbe@emc.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
2016-08-05Merge branches 'acpi-ec' and 'acpi-button'Rafael J. Wysocki
* acpi-ec: ACPI / EC: Work around method reentrancy limit in ACPICA for _Qxx * acpi-button: ACPI / button: remove pointer to old lid_sysfs on unbind
2016-08-05Merge tag 'rtc-4.8' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux Pull RTC updates from Alexandre Belloni: "RTC for 4.8 Cleanups: - huge cleanup of rtc-generic and char/genrtc this allowed to cleanup rtc-cmos, rtc-sh, rtc-m68k, rtc-powerpc and rtc-parisc - move mn10300 to rtc-cmos Subsystem: - fix wakealarms after hibernate - multiples fixes for rctest - simplify implementations of .read_alarm New drivers: - Maxim MAX6916 Drivers: - ds1307: fix weekday - m41t80: add wakeup support - pcf85063: add support for PCF85063A variant - rv8803: extend i2c fix and other fixes - s35390a: fix alarm reading, this fixes instant reboot after shutdown for QNAP TS-41x - s3c: clock fixes" * tag 'rtc-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux: (65 commits) rtc: rv8803: Clear V1F when setting the time rtc: rv8803: Stop the clock while setting the time rtc: rv8803: Always apply the I²C workaround rtc: rv8803: Fix read day of week rtc: rv8803: Remove the check for valid time rtc: rv8803: Kconfig: Indicate rx8900 support rtc: asm9260: remove .owner field for driver rtc: at91sam9: Fix missing spin_lock_init() rtc: m41t80: add suspend handlers for alarm IRQ rtc: m41t80: make it a real error message rtc: pcf85063: Add support for the PCF85063A device rtc: pcf85063: fix year range rtc: hym8563: in .read_alarm set .tm_sec to 0 to signal minute accuracy rtc: explicitly set tm_sec = 0 for drivers with minute accurancy rtc: s3c: Add s3c_rtc_{enable/disable}_clk in s3c_rtc_setfreq() rtc: s3c: Remove unnecessary call to disable already disabled clock rtc: abx80x: use devm_add_action_or_reset() rtc: m41t80: use devm_add_action_or_reset() rtc: fix a typo and reduce three empty lines to one rtc: s35390a: improve two comments in .set_alarm ...
2016-08-05Merge branches 'pm-sleep', 'pm-cpufreq', 'pm-core' and 'pm-opp'Rafael J. Wysocki
* pm-sleep: x86/power/64: Do not refer to __PAGE_OFFSET from assembly code * pm-cpufreq: cpufreq: Do not default-yes CPU_FREQ_STAT cpufreq: intel_pstate: Add more out-of-band IDs * pm-core: PM-wakeup: Delete unnecessary checks before three function calls * pm-opp: PM / OPP: optimize dev_pm_opp_set_rate() performance a bit
2016-08-05Merge tag 'sound-fix-4.8-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound Pull sound fixes from Takashi Iwai: "Nothing existing here: as usual a few HD-audio fixes (device fixups, a new AMD PCI ID, and a fix for krealloc() usage), in addition to a fix in Kconfig for legacy arm drivers" * tag 'sound-fix-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: ALSA: hda - Fix headset mic detection problem for two dell machines ALSA: hda: Fix krealloc() with __GFP_ZERO usage ALSA: hda: add AMD Bonaire AZ PCI ID with proper driver caps ALSA: arm: Fix empty menuconfig SND_ARM ALSA: hda - On-board speaker fixup on ACER Veriton ALSA: hda/realtek - Can't adjust speaker's volume on a Dell AIO
2016-08-05Merge tag 'powerpc-4.8-2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull more powerpc updates from Michael Ellerman: "These were delayed for various reasons, so I let them sit in next a bit longer, rather than including them in my first pull request. Fixes: - Fix early access to cpu_spec relocation from Benjamin Herrenschmidt - Fix incorrect event codes in power9-event-list from Madhavan Srinivasan - Move register_process_table() out of ppc_md from Michael Ellerman Use jump_label use for [cpu|mmu]_has_feature(): - Add mmu_early_init_devtree() from Michael Ellerman - Move disable_radix handling into mmu_early_init_devtree() from Michael Ellerman - Do hash device tree scanning earlier from Michael Ellerman - Do radix device tree scanning earlier from Michael Ellerman - Do feature patching before MMU init from Michael Ellerman - Check features don't change after patching from Michael Ellerman - Make MMU_FTR_RADIX a MMU family feature from Aneesh Kumar K.V - Convert mmu_has_feature() to returning bool from Michael Ellerman - Convert cpu_has_feature() to returning bool from Michael Ellerman - Define radix_enabled() in one place & use static inline from Michael Ellerman - Add early_[cpu|mmu]_has_feature() from Michael Ellerman - Convert early cpu/mmu feature check to use the new helpers from Aneesh Kumar K.V - jump_label: Make it possible for arches to invoke jump_label_init() earlier from Kevin Hao - Call jump_label_init() in apply_feature_fixups() from Aneesh Kumar K.V - Remove mfvtb() from Kevin Hao - Move cpu_has_feature() to a separate file from Kevin Hao - Add kconfig option to use jump labels for cpu/mmu_has_feature() from Michael Ellerman - Add option to use jump label for cpu_has_feature() from Kevin Hao - Add option to use jump label for mmu_has_feature() from Kevin Hao - Catch usage of cpu/mmu_has_feature() before jump label init from Aneesh Kumar K.V - Annotate jump label assembly from Michael Ellerman TLB flush enhancements from Aneesh Kumar K.V: - radix: Implement tlb mmu gather flush efficiently - Add helper for finding SLBE LLP encoding - Use hugetlb flush functions - Drop multiple definition of mm_is_core_local - radix: Add tlb flush of THP ptes - radix: Rename function and drop unused arg - radix/hugetlb: Add helper for finding page size - hugetlb: Add flush_hugetlb_tlb_range - remove flush_tlb_page_nohash Add new ptrace regsets from Anshuman Khandual and Simon Guo: - elf: Add powerpc specific core note sections - Add the function flush_tmregs_to_thread - Enable in transaction NT_PRFPREG ptrace requests - Enable in transaction NT_PPC_VMX ptrace requests - Enable in transaction NT_PPC_VSX ptrace requests - Adapt gpr32_get, gpr32_set functions for transaction - Enable support for NT_PPC_CGPR - Enable support for NT_PPC_CFPR - Enable support for NT_PPC_CVMX - Enable support for NT_PPC_CVSX - Enable support for TM SPR state - Enable NT_PPC_TM_CTAR, NT_PPC_TM_CPPR, NT_PPC_TM_CDSCR - Enable support for NT_PPPC_TAR, NT_PPC_PPR, NT_PPC_DSCR - Enable support for EBB registers - Enable support for Performance Monitor registers" * tag 'powerpc-4.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (48 commits) powerpc/mm: Move register_process_table() out of ppc_md powerpc/perf: Fix incorrect event codes in power9-event-list powerpc/32: Fix early access to cpu_spec relocation powerpc/ptrace: Enable support for Performance Monitor registers powerpc/ptrace: Enable support for EBB registers powerpc/ptrace: Enable support for NT_PPPC_TAR, NT_PPC_PPR, NT_PPC_DSCR powerpc/ptrace: Enable NT_PPC_TM_CTAR, NT_PPC_TM_CPPR, NT_PPC_TM_CDSCR powerpc/ptrace: Enable support for TM SPR state powerpc/ptrace: Enable support for NT_PPC_CVSX powerpc/ptrace: Enable support for NT_PPC_CVMX powerpc/ptrace: Enable support for NT_PPC_CFPR powerpc/ptrace: Enable support for NT_PPC_CGPR powerpc/ptrace: Adapt gpr32_get, gpr32_set functions for transaction powerpc/ptrace: Enable in transaction NT_PPC_VSX ptrace requests powerpc/ptrace: Enable in transaction NT_PPC_VMX ptrace requests powerpc/ptrace: Enable in transaction NT_PRFPREG ptrace requests powerpc/process: Add the function flush_tmregs_to_thread elf: Add powerpc specific core note sections powerpc/mm: remove flush_tlb_page_nohash powerpc/mm/hugetlb: Add flush_hugetlb_tlb_range ...
2016-08-05Merge tag 'metag-for-v4.8' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/metag Pull metag architecture updates from James Hogan: "Just a few minor fixes: - Fix another incorrect inline asm register constraint, which has been lying quietly for 5 and a half years before finally causing build breakage during this merge window. - Removal of duplicated KERN_INFO from Joe Perches - Typo fixes from Andrea Gelmini" * tag 'metag-for-v4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/metag: metag: Fix __cmpxchg_u32 asm constraint for CMP metag: Remove duplicate KERN_<LEVEL> prefix metag: Fix typos
2016-08-05sh: add device tree source for J2 FPGA on Mimas v2 boardRich Felker
Signed-off-by: Rich Felker <dalias@libc.org>
2016-08-05sh: add defconfig for J-Core J2Rich Felker
This defconfig is intended not to be specific to a particular board; it enables drivers for all currently-supported hardware, and should be updated to include additional drivers as they are added. Signed-off-by: Rich Felker <dalias@libc.org>
2016-08-05sh: use common clock framework with device tree boardsRich Felker
Enable common clk framework for DT-based boards and disable code that depends on the legacy sh clk framework when common clk is enabled. Once legacy drivers are converted over, the old code can be removed entirely. Signed-off-by: Rich Felker <dalias@libc.org>
2016-08-05sh: system call wire upYoshinori Sato
Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Rich Felker <dalias@libc.org>
2016-08-05sh: Delete unnecessary checks before the function call "mempool_destroy"Markus Elfring
The mempool_destroy() function tests whether its argument is NULL and then returns immediately. Thus the test around the calls is not needed. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Signed-off-by: Rich Felker <dalias@libc.org>
2016-08-05sh: do not perform IPI-based cache flush except on boards that need itRich Felker
Signed-off-by: Rich Felker <dalias@libc.org>
2016-08-05sh: add SMP support for J2Rich Felker
Support is hooked up via a cpu start method specified in the device tree, and also depends on DT nodes that describe the interfaces for performing IPI and identifying which cpu execution is taking place on. The currently used method is a form of spin table, where secondary cpus are unblocked by writing to a special address. Signed-off-by: Rich Felker <dalias@libc.org>
2016-08-05sh: SMP support for SH2 entry.SRich Felker
The SH2 version of entry.S uses global variables, which need to be cpu-local in order to work with SMP. For ease of access from asm, simply use arrays indexed by cpu number, and require the availability of an address (mmio register or properly setup per-cpu memory) from which the current cpu's index can be read. Signed-off-by: Rich Felker <dalias@libc.org>
2016-08-05sh: add working futex atomic ops on userspace addresses for smpRich Felker
The version of futex.h in asm-generic should really be adapted to do the same thing so that this hideous code does not have to be duplicated per-arch. Signed-off-by: Rich Felker <dalias@libc.org>
2016-08-05sh: add J2 atomics using the cas.l instructionRich Felker
Signed-off-by: Rich Felker <dalias@libc.org>
2016-08-05sh: add AT_HWCAP flag for J-Core cas.l instructionRich Felker
The J-Core cpu has, as an ISA extension, an atomic compare-and-swap instruction cas.l which applications need to use (instead the imask or gusa atomic models, which are fundamentally limited to UP) for synchronization in order to be compatible with SMP systems. Provide a hwcap flag so that it's possible to do runtime selection and support both. Signed-off-by: Rich Felker <dalias@libc.org>
2016-08-05sh: add support for J-Core J2 processorRich Felker
At the CPU/ISA level, the J2 is compatible with SH-2, and thus the changes to add J2 support build on existing SH-2 support. However, J2 does not duplicate the memory-mapped SH-2 features like the cache interface. Instead, the cache interfaces is described in the device tree, and new code is added to be able to access the flat device tree at early boot before it is unflattened. Support is also added for receiving interrupts on trap numbers in the range 16 to 31, since the J-Core aic1 interrupt controller generates these traps. This range was unused but nominally for hardware exceptions on SH-2, and a few values in this range were used for exceptions on SH-2A, but SH-2A has its own version of the relevant code. No individual cpu subtypes are added for J2 since the intent moving forward is to represent SoCs with device tree rather than as hard-coded subtypes in the kernel. The CPU_SUBTYPE_J2 Kconfig item exists only to fit into the existing cpu selection mechanism until it is overhauled. Signed-off-by: Rich Felker <dalias@libc.org>
2016-08-04ACPI / hotplug / PCI: Runtime resume bridges before bus rescansRafael J. Wysocki
If a PCI bridge (or PCIe port) that is runtime-suspended gets an ACPI hotplug notification, such as a bus check, it has to be resumed before re-scanning the devices below it, or those devices will not be accessible and will be treated as hot-removed. Make that happen and let the bridge suspend again after the bus below it has been re-scanned. This is a replacement for commit 16468c783cb4 ("ACPI / hotplug / PCI: Runtime resume bridge before rescan") that has been reverted, because it introduced a system resume regression (due to missing bridge->pci_dev checks that are necessary in case the notification is targeted at the host bridge) and it is necessary for the code added by commit 006d44e49a25 ("PCI: Add runtime PM support for PCIe ports") to work as expected. Tested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-08-04.mailmap: Correct entries for Mauro Carvalho Chehab and Shuah KhanJoe Perches
mailmap entries may not use more than 2 email addresses per line. Signed-off-by: Joe Perches <joe@perches.com> Acked-by: Shuah Khan <shuahkh@osg.samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2016-08-04Merge branch 'akpm' (patches from Andrew)Linus Torvalds
Merge misc fixes from Andrew Morton: "A few late-breaking fixes" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: mm/memblock.c: fix NULL dereference error MAINTAINERS: update cgroup's document path slub: drop bogus inline for fixup_red_left() powerpc/fsl_rio: fix a missing error code mm: initialise per_cpu_nodestats for all online pgdats at boot mm/memblock: fix a typo in a comment mm: disable CONFIG_MEMORY_HOTPLUG when KASAN is enabled
2016-08-04Merge tag 'for-linus-2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma Pull second round of rdma updates from Doug Ledford: "This can be split out into just two categories: - fixes to the RDMA R/W API in regards to SG list length limits (about 5 patches) - fixes/features for the Intel hfi1 driver (everything else) The hfi1 driver is still being brought to full feature support by Intel, and they have a lot of people working on it, so that amounts to almost the entirety of this pull request" * tag 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: (84 commits) IB/hfi1: Add cache evict LRU list IB/hfi1: Fix memory leak during unexpected shutdown IB/hfi1: Remove unneeded mm argument in remove function IB/hfi1: Consistently call ops->remove outside spinlock IB/hfi1: Use evict mmu rb operation IB/hfi1: Add evict operation to the mmu rb handler IB/hfi1: Fix TID caching actions IB/hfi1: Make the cache handler own its rb tree root IB/hfi1: Make use of mm consistent IB/hfi1: Fix user SDMA racy user request claim IB/hfi1: Fix error condition that needs to clean up IB/hfi1: Release node on insert failure IB/hfi1: Validate SDMA user iovector count IB/hfi1: Validate SDMA user request index IB/hfi1: Use the same capability state for all shared contexts IB/hfi1: Prevent null pointer dereference IB/hfi1: Rename TID mmu_rb_* functions IB/hfi1: Remove unneeded empty check in hfi1_mmu_rb_unregister() IB/hfi1: Restructure hfi1_file_open IB/hfi1: Make iovec loop index easy to understand ...
2016-08-04Merge tag 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma Pull base rdma updates from Doug Ledford: "Round one of 4.8 code: while this is mostly normal, there is a new driver in here (the driver was hosted outside the kernel for several years and is actually a fairly mature and well coded driver). It amounts to 13,000 of the 16,000 lines of added code in here. Summary: - Updates/fixes for iw_cxgb4 driver - Updates/fixes for mlx5 driver - Add flow steering and RSS API - Add hardware stats to mlx4 and mlx5 drivers - Add firmware version API for RDMA driver use - Add the rxe driver (this is a software RoCE driver that makes any Ethernet device a RoCE device) - Fixes for i40iw driver - Support for send only multicast joins in the cma layer - Other minor fixes" * tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: (72 commits) Soft RoCE driver IB/core: Support for CMA multicast join flags IB/sa: Add cached attribute containing SM information to SA port IB/uverbs: Fix race between uverbs_close and remove_one IB/mthca: Clean up error unwind flow in mthca_reset() IB/mthca: NULL arg to pci_dev_put is OK IB/hfi1: NULL arg to sc_return_credits is OK IB/mlx4: Add diagnostic hardware counters net/mlx4: Query performance and diagnostics counters net/mlx4: Add diagnostic counters capability bit Use smaller 512 byte messages for portmapper messages IB/ipoib: Report SG feature regardless of HW UD CSUM capability IB/mlx4: Don't use GFP_ATOMIC for CQ resize struct IB/hfi1: Disable by default IB/rdmavt: Disable by default IB/mlx5: Fix port counter ID association to QP offset IB/mlx5: Fix iteration overrun in GSI qps i40iw: Add NULL check for puda buffer i40iw: Change dup_ack_thresh to u8 i40iw: Remove unnecessary check for moving CQ head ...
2016-08-04Merge branch 'for-next' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending Pull SCSI target updates from Nicholas Bellinger: "The most notable item is IBM virtual SCSI target driver, that was originally ported to target-core back in 2010 by Tomo-san, and has been brought forward to v4.x code by Bryant Ly, Michael Cyr and co over the last months. Also included are two ORDERED task related bug-fixes Bryant + Michael found along the way using ibmvscsis with AIX guests, plus a few miscellaneous target-core + iscsi-target bug-fixes with associated stable tags" * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: target: fix spelling mistake: "limitiation" -> "limitation" target: Fix residual overflow handling in target_complete_cmd_with_length tcm_fc: set and unset FCP_SPPF_TARG_FCN iscsi-target: Fix panic when adding second TCP connection to iSCSI session ibmvscsis: Initial commit of IBM VSCSI Tgt Driver target: Fix ordered task CHECK_CONDITION early exception handling target: Fix ordered task target_setup_cmd_from_cdb exception hang target: Fix max_unmap_lba_count calc overflow target: Fix race between iscsi-target connection shutdown + ABORT_TASK target: Fix missing complete during ABORT_TASK + CMD_T_FABRIC_STOP
2016-08-04mm/memblock.c: fix NULL dereference errorzijun_hu
It causes NULL dereference error and failure to get type_a->regions[0] info if parameter type_b of __next_mem_range_rev() == NULL Fix this by checking before dereferring and initializing idx_b to 0 The approach is tested by dumping all types of region via __memblock_dump_all() and __next_mem_range_rev() fixed to UART separately the result is okay after checking the logs. Link: http://lkml.kernel.org/r/57A0320D.6070102@zoho.com Signed-off-by: zijun_hu <zijun_hu@htc.com> Tested-by: zijun_hu <zijun_hu@htc.com> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-08-04MAINTAINERS: update cgroup's document pathseokhoon.yoon
cgroup's document path is changed to "cgroup-v1". update it. Link: http://lkml.kernel.org/r/1470322507-5161-1-git-send-email-iamyooon@gmail.com Signed-off-by: seokhoon.yoon <iamyooon@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-08-04slub: drop bogus inline for fixup_red_left()Geert Uytterhoeven
With m68k-linux-gnu-gcc-4.1: include/linux/slub_def.h:126: warning: `fixup_red_left' declared inline after being called include/linux/slub_def.h:126: warning: previous declaration of `fixup_red_left' was here Commit c146a2b98eb5 ("mm, kasan: account for object redzone in SLUB's nearest_obj()") made fixup_red_left() global, but forgot to remove the inline keyword. Fixes: c146a2b98eb5898e ("mm, kasan: account for object redzone in SLUB's nearest_obj()") Link: http://lkml.kernel.org/r/1470256262-1586-1-git-send-email-geert@linux-m68k.org Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Alexander Potapenko <glider@google.com> Acked-by: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-08-04powerpc/fsl_rio: fix a missing error codeDan Carpenter
We should set the error code here rather than incorrectly returning 0. Otherwise static checkers complain. Link: http://lkml.kernel.org/r/20160804053525.GM775@mwanda Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Alexandre Bounine <alexandre.bounine@idt.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-08-04mm: initialise per_cpu_nodestats for all online pgdats at bootMel Gorman
Paul Mackerras and Reza Arbab reported that machines with memoryless nodes fail when vmstats are refreshed. Paul reported an oops as follows Unable to handle kernel paging request for data at address 0xff7a10000 Faulting instruction address: 0xc000000000270cd0 Oops: Kernel access of bad area, sig: 11 [#1] SMP NR_CPUS=2048 NUMA PowerNV Modules linked in: CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.7.0-kvm+ #118 task: c000000ff0680010 task.stack: c000000ff0704000 NIP: c000000000270cd0 LR: c000000000270ce8 CTR: 0000000000000000 REGS: c000000ff0707900 TRAP: 0300 Not tainted (4.7.0-kvm+) MSR: 9000000102009033 <SF,HV,VEC,EE,ME,IR,DR,RI,LE,TM[E]> CR: 846b6824 XER: 20000000 CFAR: c000000000008768 DAR: 0000000ff7a10000 DSISR: 42000000 SOFTE: 1 NIP refresh_zone_stat_thresholds+0x80/0x240 LR refresh_zone_stat_thresholds+0x98/0x240 Call Trace: refresh_zone_stat_thresholds+0xb8/0x240 (unreliable) Both supplied potential fixes but one potentially misses checks and another had redundant initialisations. This version initialises per_cpu_nodestats on a per-pgdat basis instead of on a per-zone basis. Link: http://lkml.kernel.org/r/20160804092404.GI2799@techsingularity.net Signed-off-by: Mel Gorman <mgorman@techsingularity.net> Reported-by: Paul Mackerras <paulus@ozlabs.org> Reported-by: Reza Arbab <arbab@linux.vnet.ibm.com> Tested-by: Reza Arbab <arbab@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-08-04mm/memblock: fix a typo in a commentAlexander Kuleshov
s/accomodate/accommodate/ Link: http://lkml.kernel.org/r/20160804121824.18100-1-kuleshovmail@gmail.com Signed-off-by: Alexander Kuleshov <kuleshovmail@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>