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2017-02-16x86/mm/ptdump: Optimize check for W+X mappings for CONFIG_KASAN=yAndrey Ryabinin
Enabling both DEBUG_WX=y and KASAN=y options significantly increases boot time (dozens of seconds at least). KASAN fills kernel page tables with repeated values to map several TBs of the virtual memory to the single kasan_zero_page: kasan_zero_pud -> kasan_zero_pmd-> kasan_zero_pte-> kasan_zero_page So, the page table walker used to find W+X mapping check the same kasan_zero_p?d page table entries a lot more than once. With patch pud walker will skip the pud if it has the same value as the previous one . Skipping done iff we search for W+X mappings, so this optimization won't affect the page table dump via debugfs. This dropped time spend in W+X check from ~30 sec to reasonable 0.1 sec: Before: [ 4.579991] Freeing unused kernel memory: 1000K [ 35.257523] x86/mm: Checked W+X mappings: passed, no W+X pages found. After: [ 5.138756] Freeing unused kernel memory: 1000K [ 5.266496] x86/mm: Checked W+X mappings: passed, no W+X pages found. Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com> Reviewed-by: Alexander Potapenko <glider@google.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: kasan-dev@googlegroups.com Cc: Tobias Regnery <tobias.regnery@gmail.com> Cc: Dmitry Vyukov <dvyukov@google.com> Link: http://lkml.kernel.org/r/20170214100839.17186-1-aryabinin@virtuozzo.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2017-02-16Merge branch 'linus' into x86/mmThomas Gleixner
Make sure to get the latest fixes before applying the ptdump enhancements.
2017-02-16Staging: vc04_services: Fix the "space prohibited" code style errorsMandel Benjamin
Fixes the following code style errors: ERROR: space prohibited after/before that open/closed parenthesis Signed-off-by: Mandel Benjamin <benyx.mandel@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-02-16Staging: vc04_services: Fix the "wrong indent" code style errorsMandel Benjamin
Fixes the following code style errors: ERROR: code indent should use tabs where possible Signed-off-by: Mandel Benjamin <benyx.mandel@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-02-16staging: octeon: Use net_device_stats from struct net_deviceTobias Klauser
Instead of using a private copy of struct net_device_stats in struct octeon_ethernet, use stats from struct net_device. Also remove the now unnecessary .ndo_get_stats function. Signed-off-by: Tobias Klauser <tklauser@distanz.ch> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-02-16Staging: rtl8192u: ieee80211: ieee80211.h - style fixDerek Robson
Fixed style of block comments Found using checkpatch Signed-off-by: Derek Robson <robsonde@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-02-16Staging: rtl8192u: ieee80211: ieee80211_tx.c - style fixDerek Robson
Fixed style of block comments Found using checkpatch Signed-off-by: Derek Robson <robsonde@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-02-16Staging: rtl8192u: ieee80211: rtl819x_BAProc.c - style fixDerek Robson
Fixed style of block comments Found using checkpatch Signed-off-by: Derek Robson <robsonde@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-02-16Staging: rtl8192u: ieee80211: ieee80211_module.c - style fixDerek Robson
Fixed style of block comments Found using checkpatch Signed-off-by: Derek Robson <robsonde@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-02-16Staging: rtl8192u: ieee80211: rtl819x_TSProc.c - style fixDerek Robson
Fixed style of block comments Found using checkpatch Signed-off-by: Derek Robson <robsonde@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-02-16Staging: rtl8192u: r8192U.h - style fixDerek Robson
Fixed style of block comments Found using checkpatch Signed-off-by: Derek Robson <robsonde@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-02-16Staging: rtl8192u: r8192U_core.c - style fixDerek Robson
Fixed style of block comments Found using checkpatch Signed-off-by: Derek Robson <robsonde@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-02-16Staging: rtl8192u: r819xU_cmdpkt.c - style fixDerek Robson
Fixed style of block comments Found using checkpatch Signed-off-by: Derek Robson <robsonde@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-02-16staging: rtl8192u: blank lines aren't necessary before a close brace '}'simran singhal
Fix checkpatch issues: "CHECK: Blank lines aren't necessary before a close brace '}'". Signed-off-by: simran singhal <singhalsimran0@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-02-16staging: rtl8192u: Adding space after enum and struct definitionsimran singhal
Fixes checkpatch.pl warning: WARNING: missing space after struct definition WARNING: missing space after enum definition Signed-off-by: simran singhal <singhalsimran0@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-02-16staging: rtl8192u: Adding space after struct definitionsimran singhal
Fixes checkpatch.pl warning: WARNING: missing space after struct definition Signed-off-by: simran singhal <singhalsimran0@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-02-16Staging: ks7010: Add required and preferred spaces around operatorsShiva Kerdel
Spaces should be added around operators to improve readability and are required in some cases. Signed-off-by: Shiva Kerdel <shiva@exdev.nl> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-02-16Staging: ks7010: ks*: Remove redundant blank linesShiva Kerdel
Multiple blank lines shouldn't be used. Signed-off-by: Shiva Kerdel <shiva@exdev.nl> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-02-16Staging: ks7010: ks*: Add missing blank lines after declarationsShiva Kerdel
A blank line should be added after function/struct/union/enum declarations. Signed-off-by: Shiva Kerdel <shiva@exdev.nl> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-02-16ASoC: mediatek: add power-domains for mt2701-afe-pcm.txtGarlic Tseng
This add power-domains for mt2701-afe-pcm Signed-off-by: Garlic Tseng <garlic.tseng@mediatek.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2017-02-16ASoC: mediatek: add power-domain get/put ctrl for mt2701Garlic Tseng
add power-domain ctrl for audio driver Signed-off-by: Garlic Tseng <garlic.tseng@mediatek.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2017-02-16spi: rspi: Replaces "n" by "len" in qspi_transfer_*()DongCV
This patch replaced "n" by "len" bytes of data in qspi_transfer_in() and qspi_transfer_out() function. This will make improving readability. Signed-off-by: DongCV <cv-dong@jinso.co.jp> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Mark Brown <broonie@kernel.org>
2017-02-16spi: rspi: Fixes bogus received byte in qspi_transfer_in()DongCV
In qspi_transfer_in(), when receiving the last n (or len) bytes of data, one bogus byte was written in the receive buffer. This code leads to a buffer overflow. "jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x03b40000: 0x1900 instead jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x03b40004: 0x000c instead" The error message above happens when trying to mount, unmount, and remount a jffs2-formatted device. This patch removed the bogus write to fixes: 3be09bec42a800d4 "spi: rspi: supports 32bytes buffer for DUAL and QUAD" And here is Geert's comment: "spi: rspi: Fix bogus received byte in qspi_transfer_in() When there are less than QSPI_BUFFER_SIZE remaining bytes to be received, qspi_transfer_in() writes one bogus byte in the receive buffer, possibly leading to a buffer overflow. This can be reproduced by mounting, unmounting, and remounting a jffs2-formatted device, causing lots of warnings like: "jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x03b40000: 0x1900 instead" Remove the bogus write to fix this. " Signed-off-by: DongCV <cv-dong@jinso.co.jp> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Mark Brown <broonie@kernel.org>
2017-02-16staging: visorbus, replace init_timer with setup_timerStefan Svinciak
Newer version is more readable and needs less changes if/when timer_struct is to be changed. Signed-off-by: Stefan Svinciak <xsvinc1@fi.muni.cz> Signed-off-by: Jiri Slaby <jslaby@suse.cz> Cc: David Kershner <david.kershner@unisys.com> Cc: <sparmaintainer@unisys.com> Acked-by: David Kershner <david.kershner@unisys.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-02-16staging: vt6656: rxtx.c Removed multiple dereferencingMichael S. Hansen
Fixes checkpatch warning: Avoid multiple line dereference Signed-off-by: Michael S. Hansen <michael.schacht.hansen@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-02-16staging: vt6656: Alignment match open parenthesisArushi Singhal
Fix checkpatch issues: "CHECK: Alignment should match open parenthesis" Signed-off-by: Arushi Singhal <arushisinghal19971997@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-02-16staging: vt6656: Alignment should match open parenthesisArushi Singhal
Fix checkpatch issues: "CHECK: Alignment should match open parenthesis" Signed-off-by: Arushi Singhal <arushisinghal19971997@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-02-16Merge tag 'media/v4.10-5' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media Pull media fix from Mauro Carvalho Chehab: "A regression fix that makes the Siano driver to work again after the CONFIG_VMAP_STACK change" * tag 'media/v4.10-5' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: [media] siano: make it work again with CONFIG_VMAP_STACK
2017-02-16Staging: bcm2835-audio: fixed a code style issue:Bo YU
Missing a blank line after declarations Signed-off-by: Bo YU <tsu.yubo@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-02-16staging: bcm2835-audio: allocate enough data for work queuesDan Carpenter
We accidentally allocate sizeof(void *) bytes instead of 112 bytes. It results in memory corruption. Fixes: 23b028c871e1 ("staging: bcm2835-audio: initial staging submission") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-02-16Staging: bcm2835-audio: && vs & typoDan Carpenter
We intended to mask away the upper bits but there is a "&&" vs "&" typo so it's broken. Fixes: 23b028c871e1 ("staging: bcm2835-audio: initial staging submission") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-02-16staging: wlan-ng: remove space before tabGargi Sharma
remove the space before the tab to fix the the checkpatch issue, no spaces before tabs. Signed-off-by: Gargi Sharma <gs051095@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-02-16staging: lustre: Fix incompatible argument in osc_match_baseMaxime Rossi Bellom
sparse warn about _u32 used for two arguments in function osc_match_base instead of enum ldlm_type and enum ldlm_mode as used in the prototype. Signed-off-by: Maxime Rossi Bellom <mrossibellom@gmail.com> Reviewed-by: James Simmons <jsimmons@infradead.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-02-16regulator: core: Resolve supplies before disabling unused regulatorsJavier Martinez Canillas
After commit 66d228a2bf03 ("regulator: core: Don't use regulators as supplies until the parent is bound"), input supplies aren't resolved if the input supplies parent device has not been bound. This prevent regulators to hold an invalid reference if its supply parent device driver probe is deferred. But this causes issues on some boards where a PMIC's regulator use as input supply a regulator from another PMIC whose driver is registered after the driver for the former. In this case the regulators for the first PMIC will fail to resolve input supplies on regulators registration (since the other PMIC wasn't probed yet). And when the core attempts to resolve again latter when the other PMIC registers its own regulators, it will fail again since the parent device isn't bound yet. This will cause some parent supplies to never be resolved and wrongly be disabled on boot due taking them as unused. To solve this problem, also attempt to resolve the pending regulators input supplies before disabling the unused regulators. Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2017-02-16Staging: comedi: drivers: comedi_test: Add auto-configuration capabilityCheah Kok Cheong
Currently this module needs to be manually configured by COMEDI userspace tool before the test waveform can be read by a COMEDI compatible application. This patch adds auto-configuration capability and makes it the default loading option. This is achieved by creating a device during init to stand in for a real hardware device. This allows comedi_auto_config() to perform auto-configuration. With this patch, the test waveform can be read by a COMEDI compatible application without needing manual configuration. Previous behaviour is still selectable via module loading parameter. Module loading without passing any parameter will default to auto-configuration with the same default waveform amplitude and period values. For auto-configuration, different amplitude and period values can be set via module loading parameters. Tested on Xubuntu 16.04 using Xoscope ver: 2.0 which is available in the Ubuntu repository. Xoscope is a COMEDI compatible digital oscilloscope application. For manual configuration, only module loading/unloading is tested. Here are the truncated dmesg output. [sudo modprobe comedi_test] comedi_test: 1000000 microvolt, 100000 microsecond waveform attached driver 'comedi_test' has successfully auto-configured 'comedi_test'. [sudo modprobe comedi_test amplitude=2500000 period=150000] comedi_test: 2500000 microvolt, 150000 microsecond waveform attached driver 'comedi_test' has successfully auto-configured 'comedi_test'. [sudo modprobe comedi_test noauto=1] comedi_test: module is from the staging directory, the quality is unknown, you have been warned. For those without an actual hardware, the comedi_test module is as close as one can get to test the COMEDI system. Having both auto and manual configuration capability will broaden the test function of this module. Hopefully this will make it easier for people to check out the COMEDI system and contribute to its development. Signed-off-by: Cheah Kok Cheong <thrust73@gmail.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-02-16dm cache metadata: use cursor api in blocks_are_clean_separate_dirty()Mike Snitzer
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2017-02-16dm persistent data: add cursor skip functions to the cursor APIsJoe Thornber
Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2017-02-16dm cache metadata: use dm_bitset_new() to create the dirty bitset in format 2Joe Thornber
Big speed up with large configs. Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2017-02-16dm bitset: add dm_bitset_new()Joe Thornber
A more efficient way of creating a populated bitset. Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2017-02-16dm cache metadata: name the cache block that couldn't be loadedMike Snitzer
Improves __load_mapping_v1() and __load_mapping_v2() DMERR messages to explicitly name the cache block number whose mapping couldn't be loaded. Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2017-02-16dm cache metadata: add "metadata2" featureJoe Thornber
If "metadata2" is provided as a table argument when creating/loading a cache target a more compact metadata format, with separate dirty bits, is used. "metadata2" improves speed of shutting down a cache target. Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2017-02-16dm cache metadata: use bitset cursor api to load discard bitsetJoe Thornber
Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2017-02-16dm bitset: introduce cursor apiJoe Thornber
Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2017-02-16dm btree: use GFP_NOFS in dm_btree_del()Joe Thornber
dm_btree_del() is called from an ioctl so don't recurse into FS. Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2017-02-16dm space map common: memcpy the disk root to ensure it's arch alignedJoe Thornber
The metadata_space_map_root passed to sm_ll_open_metadata() may or may not be arch aligned, use memcpy to ensure it is. This is not a fast path so the extra memcpy doesn't hurt us. Long-term it'd be better to use the kernel's alignment infrastructure to remove the memcpy()s that are littered across persistent-data (btree, array, space-maps, etc). Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2017-02-16dm block manager: add unlikely() annotations on dm_bufio error pathsJoe Thornber
Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2017-02-16dm cache: fix corruption seen when using cache > 2TBJoe Thornber
A rounding bug due to compiler generated temporary being 32bit was found in remap_to_cache(). A localized cast in remap_to_cache() fixes the corruption but this preferred fix (changing from uint32_t to sector_t) eliminates potential for future rounding errors elsewhere. Cc: stable@vger.kernel.org Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2017-02-16KVM: Support vCPU-based gfn->hva cacheCao, Lei
Provide versions of struct gfn_to_hva_cache functions that take vcpu as a parameter instead of struct kvm. The existing functions are not needed anymore, so delete them. This allows dirty pages to be logged in the vcpu dirty ring, instead of the global dirty ring, for ring-based dirty memory tracking. Signed-off-by: Lei Cao <lei.cao@stratus.com> Message-Id: <CY1PR08MB19929BD2AC47A291FD680E83F04F0@CY1PR08MB1992.namprd08.prod.outlook.com> Reviewed-by: Radim Krčmář <rkrcmar@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-02-16KVM: use separate generations for each address spacePaolo Bonzini
This will make it easier to support multiple address spaces in kvm_gfn_to_hva_cache_init. Instead of having to check the address space id, we can keep on checking just the generation number. Reviewed-by: Radim Krčmář <rkrcmar@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-02-16KVM: only retrieve memslots once when initializing cachePaolo Bonzini
This will make it a bit simpler to handle multiple address spaces in gfn_to_hva_cache. Reviewed-by: Radim Krčmář <rkrcmar@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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