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2015-05-19mm/uaccess, mm/fault: Clarify that uaccess may only sleep if pagefaults are ↵David Hildenbrand12-59/+118
enabled In general, non-atomic variants of user access functions must not sleep if pagefaults are disabled. Let's update all relevant comments in uaccess code. This also reflects the might_sleep() checks in might_fault(). Reviewed-and-tested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: David.Laight@ACULAB.COM Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: airlied@linux.ie Cc: akpm@linux-foundation.org Cc: benh@kernel.crashing.org Cc: bigeasy@linutronix.de Cc: borntraeger@de.ibm.com Cc: daniel.vetter@intel.com Cc: heiko.carstens@de.ibm.com Cc: herbert@gondor.apana.org.au Cc: hocko@suse.cz Cc: hughd@google.com Cc: mst@redhat.com Cc: paulus@samba.org Cc: ralf@linux-mips.org Cc: schwidefsky@de.ibm.com Cc: yang.shi@windriver.com Link: http://lkml.kernel.org/r/1431359540-32227-4-git-send-email-dahi@linux.vnet.ibm.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-05-19sched/preempt, mm/fault: Trigger might_sleep() in might_fault() with ↵David Hildenbrand2-13/+8
disabled pagefaults Commit 662bbcb2747c ("mm, sched: Allow uaccess in atomic with pagefault_disable()") removed might_sleep() checks for all user access code (that uses might_fault()). The reason was to disable wrong "sleep in atomic" warnings in the following scenario: pagefault_disable() rc = copy_to_user(...) pagefault_enable() Which is valid, as pagefault_disable() increments the preempt counter and therefore disables the pagefault handler. copy_to_user() will not sleep and return an error code if a page is not available. However, as all might_sleep() checks are removed, CONFIG_DEBUG_ATOMIC_SLEEP would no longer detect the following scenario: spin_lock(&lock); rc = copy_to_user(...) spin_unlock(&lock) If the kernel is compiled with preemption turned on, preempt_disable() will make in_atomic() detect disabled preemption. The fault handler would correctly never sleep on user access. However, with preemption turned off, preempt_disable() is usually a NOP (with !CONFIG_PREEMPT_COUNT), therefore in_atomic() will not be able to detect disabled preemption nor disabled pagefaults. The fault handler could sleep. We really want to enable CONFIG_DEBUG_ATOMIC_SLEEP checks for user access functions again, otherwise we can end up with horrible deadlocks. Root of all evil is that pagefault_disable() acts almost as preempt_disable(), depending on preemption being turned on/off. As we now have pagefault_disabled(), we can use it to distinguish whether user acces functions might sleep. Convert might_fault() into a makro that calls __might_fault(), to allow proper file + line messages in case of a might_sleep() warning. Reviewed-and-tested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: David.Laight@ACULAB.COM Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: airlied@linux.ie Cc: akpm@linux-foundation.org Cc: benh@kernel.crashing.org Cc: bigeasy@linutronix.de Cc: borntraeger@de.ibm.com Cc: daniel.vetter@intel.com Cc: heiko.carstens@de.ibm.com Cc: herbert@gondor.apana.org.au Cc: hocko@suse.cz Cc: hughd@google.com Cc: mst@redhat.com Cc: paulus@samba.org Cc: ralf@linux-mips.org Cc: schwidefsky@de.ibm.com Cc: yang.shi@windriver.com Link: http://lkml.kernel.org/r/1431359540-32227-3-git-send-email-dahi@linux.vnet.ibm.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-05-19sched/preempt, mm/fault: Count pagefault_disable() levels in pagefault_disabledDavid Hildenbrand3-7/+33
Until now, pagefault_disable()/pagefault_enabled() used the preempt count to track whether in an environment with pagefaults disabled (can be queried via in_atomic()). This patch introduces a separate counter in task_struct to count the level of pagefault_disable() calls. We'll keep manipulating the preempt count to retain compatibility to existing pagefault handlers. It is now possible to verify whether in a pagefault_disable() envionment by calling pagefault_disabled(). In contrast to in_atomic() it will not be influenced by preempt_enable()/preempt_disable(). This patch is based on a patch from Ingo Molnar. Reviewed-and-tested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: David.Laight@ACULAB.COM Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: airlied@linux.ie Cc: akpm@linux-foundation.org Cc: benh@kernel.crashing.org Cc: bigeasy@linutronix.de Cc: borntraeger@de.ibm.com Cc: daniel.vetter@intel.com Cc: heiko.carstens@de.ibm.com Cc: herbert@gondor.apana.org.au Cc: hocko@suse.cz Cc: hughd@google.com Cc: mst@redhat.com Cc: paulus@samba.org Cc: ralf@linux-mips.org Cc: schwidefsky@de.ibm.com Cc: yang.shi@windriver.com Link: http://lkml.kernel.org/r/1431359540-32227-2-git-send-email-dahi@linux.vnet.ibm.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-05-19sched/preempt: Remove PREEMPT_ACTIVE unmasking off in_atomic()Frederic Weisbecker1-1/+1
Now that PREEMPT_ACTIVE implies PREEMPT_DISABLE_OFFSET, ignoring PREEMPT_ACTIVE from in_atomic() check isn't useful anymore. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1431441711-29753-7-git-send-email-fweisbec@gmail.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-05-19sched/preempt: Fix out of date commentFrederic Weisbecker1-1/+1
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1431441711-29753-6-git-send-email-fweisbec@gmail.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-05-19sched/preempt: Optimize preemption operations on __schedule() callersFrederic Weisbecker2-20/+21
__schedule() disables preemption and some of its callers (the preempt_schedule*() family) also set PREEMPT_ACTIVE. So we have two preempt_count() modifications that could be performed at once. Lets remove the preemption disablement from __schedule() and pull this responsibility to its callers in order to optimize preempt_count() operations in a single place. Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1431441711-29753-5-git-send-email-fweisbec@gmail.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-05-19sched/preempt: Rename PREEMPT_CHECK_OFFSET to PREEMPT_DISABLE_OFFSETFrederic Weisbecker1-4/+4
"CHECK" suggests it's only used as a comparison mask. But now it's used further as a config-conditional preempt disabler offset. Lets disambiguate this name. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1431441711-29753-4-git-send-email-fweisbec@gmail.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-05-19sched/preempt: Rearrange a few symbols after headers mergeFrederic Weisbecker1-19/+15
Adjust a few comments, and further integrate a few definitions after the dumb headers copy. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1431441711-29753-3-git-send-email-fweisbec@gmail.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-05-19sched/preempt: Merge preempt_mask.h into preempt.hFrederic Weisbecker7-124/+114
preempt_mask.h defines all the preempt_count semantics and related symbols: preempt, softirq, hardirq, nmi, preempt active, need resched, etc... preempt.h defines the accessors and mutators of preempt_count. But there is a messy dependency game around those two header files: * preempt_mask.h includes preempt.h in order to access preempt_count() * preempt_mask.h defines all preempt_count semantic and symbols except PREEMPT_NEED_RESCHED that is needed by asm/preempt.h Thus we need to define it from preempt.h, right before including asm/preempt.h, instead of defining it to preempt_mask.h with the other preempt_count symbols. Therefore the preempt_count semantics happen to be spread out. * We plan to introduce preempt_active_[enter,exit]() to consolidate preempt_schedule*() code. But we'll need to access both preempt_count mutators (preempt_count_add()) and preempt_count symbols (PREEMPT_ACTIVE, PREEMPT_OFFSET). The usual place to define preempt operations is in preempt.h but then we'll need symbols in preempt_mask.h which already includes preempt.h. So we end up with a ressource circle dependency. Lets merge preempt_mask.h into preempt.h to solve these dependency issues. This way we gather semantic symbols and operation definition of preempt_count in a single file. This is a dumb copy-paste merge. Further merge re-arrangments are performed in a subsequent patch to ease review. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1431441711-29753-2-git-send-email-fweisbec@gmail.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-05-19Merge tag 'v4.1-rc4' into sched/core, before applying new patchesIngo Molnar428-4249/+4363
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-05-18Linux 4.1-rc4Linus Torvalds1-1/+1
2015-05-18watchdog: Fix merge 'conflict'Peter Zijlstra1-5/+15
Two watchdog changes that came through different trees had a non conflicting conflict, that is, one changed the semantics of a variable but no actual code conflict happened. So the merge appeared fine, but the resulting code did not behave as expected. Commit 195daf665a62 ("watchdog: enable the new user interface of the watchdog mechanism") changes the semantics of watchdog_user_enabled, which thereafter is only used by the functions introduced by b3738d293233 ("watchdog: Add watchdog enable/disable all functions"). There further appears to be a distinct lack of serialization between setting and using watchdog_enabled, so perhaps we should wrap the {en,dis}able_all() things in watchdog_proc_mutex. This patch fixes a s2r failure reported by Michal; which I cannot readily explain. But this does make the code internally consistent again. Reported-and-tested-by: Michal Hocko <mhocko@suse.cz> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-05-18Merge tag 'for-linus-20150516' of git://git.infradead.org/linux-mtdLinus Torvalds3-8/+10
Pull MTD fixes from Brian Norris: "Two MTD fixes for 4.1: - readtest: the signal-handling code was clobbering the error codes we should be handling/reporting in this test, rendering it useless. Noticed by Coverity. - the common SPI NOR flash DT binding (merged for 4.1-rc1) is being revised, so let's change that before 4.1 is minted" * tag 'for-linus-20150516' of git://git.infradead.org/linux-mtd: Documentation: dt: mtd: replace "nor-jedec" binding with "jedec, spi-nor" mtd: readtest: don't clobber error reports
2015-05-17sched: Fix function declaration return type mismatchNicholas Mc Guire1-3/+3
static code checking was unhappy with: ./kernel/sched/fair.c:162 WARNING: return of wrong type int != unsigned int get_update_sysctl_factor() is declared to return int but is currently returning an unsigned int. The first few preprocessed lines are: static int get_update_sysctl_factor(void) { unsigned int cpus = ({ int __min1 = (cpumask_weight(cpu_online_mask)); int __min2 = (8); __min1 < __min2 ? __min1: __min2; }); unsigned int factor; The type used by min_t() should be 'unsigned int' and the return type of get_update_sysctl_factor() should also be 'unsigned int' as its call-site update_sysctl() is expecting 'unsigned int' and the values utilizing: 'factor' 'sysctl_sched_min_granularity' 'sched_nr_latency' 'sysctl_sched_wakeup_granularity' ... are also all 'unsigned int', plus cpumask_weight() is also returning 'unsigned int'. So the natural type to use around here is 'unsigned int'. ( Patch was compile tested with x86_64_defconfig + CONFIG_SCHED_DEBUG=y and the changed sections in kernel/sched/fair.i were reviewed. ) Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org> [ Improved the changelog a bit. ] Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1431716742-11077-1-git-send-email-hofrat@osadl.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-05-16Merge tag 'usb-4.1-rc4' of ↵Linus Torvalds38-140/+171
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb Pull USB fixes from Greg KH: "Here are some USB fixes and new device ids for 4.1-rc4. All are pretty minor, and have been in linux-next successfully" * tag 'usb-4.1-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: usb-storage: Add NO_WP_DETECT quirk for Lacie 059f:0651 devices Added another USB product ID for ELAN touchscreen quirks. xhci: gracefully handle xhci_irq dead device xhci: Solve full event ring by increasing TRBS_PER_SEGMENT to 256 xhci: fix isoc endpoint dequeue from advancing too far on transaction error usb: chipidea: debug: avoid out of bound read USB: visor: Match I330 phone more precisely USB: pl2303: Remove support for Samsung I330 USB: cp210x: add ID for KCF Technologies PRN device usb: gadget: remove incorrect __init/__exit annotations usb: phy: isp1301: work around tps65010 dependency usb: gadget: serial: fix re-ordering of tx data usb: gadget: hid: Fix static variable usage usb: gadget: configfs: Fix interfaces array NULL-termination usb: gadget: xilinx: fix devm_ioremap_resource() check usb: dwc3: dwc3-omap: correct the register macros
2015-05-16Merge tag 'tty-4.1-rc4' of ↵Linus Torvalds10-34/+64
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty Pull tty/serial fixes from Greg KH: "Here's some TTY and serial driver fixes for reported issues. All of these have been in linux-next successfully" * tag 'tty-4.1-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: pty: Fix input race when closing tty/n_gsm.c: fix a memory leak when gsmtty is removed Revert "serial/amba-pl011: Leave the TX IRQ alone when the UART is not open" serial: omap: Fix error handling in probe earlycon: Revert log warnings
2015-05-16Merge tag 'staging-4.1-rc4' of ↵Linus Torvalds24-110/+152
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging Pull staging / IIO driver fixes from Greg KH: "Here's some staging and iio driver fixes to resolve a number of reported issues. All of these have been in linux-next for a while" * tag 'staging-4.1-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (31 commits) iio: light: hid-sensor-prox: Fix memory leak in probe() iio: adc: cc10001: Add delay before setting START bit iio: adc: cc10001: Fix regulator_get_voltage() return value check iio: adc: cc10001: Fix incorrect use of power-up/power-down register staging: gdm724x: Correction of variable usage after applying ALIGN() iio: adc: cc10001: Fix the channel number mapping staging: vt6655: lock MACvWriteBSSIDAddress. staging: vt6655: CARDbUpdateTSF bss timestamp correct tsf counter value. staging: vt6655: vnt_tx_packet Correct TX order of OWNED_BY_NIC staging: vt6655: Fix 80211 control and management status reporting. staging: vt6655: implement IEEE80211_TX_STAT_NOACK_TRANSMITTED staging: vt6655: device_free_tx_buf use only ieee80211_tx_status_irqsafe staging: vt6656: use ieee80211_tx_info to select packet type. staging: rtl8712: freeing an ERR_PTR staging: sm750: remove incorrect __exit annotation iio: kfifo: Set update_needed to false only if a buffer was allocated iio: mcp320x: Fix occasional incorrect readings iio: accel: mma9553: check input value for activity period iio: accel: mma9553: add enable channel for activity iio: accel: mma9551_core: prevent buffer overrun ...
2015-05-16Merge tag 'char-misc-4.1-rc4' of ↵Linus Torvalds1-12/+12
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc Pull char/misc fix from Greg KH: "Here is one fix, in the extcon subsystem, that resolves a reported issue. It's been in linux-next for a number of weeks now, sorry for not getting it to you sooner" * tag 'char-misc-4.1-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: extcon: usb-gpio: register extcon device before IRQ registration
2015-05-16Merge branch 'for-linus-4.1-rc4' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml Pull UML hostfs fix from Richard Weinberger: "This contains a single fix for a regression introduced in 4.1-rc1" * 'for-linus-4.1-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml: hostfs: Use correct mask for file mode
2015-05-16Merge tag 'upstream-4.1-rc4' of git://git.infradead.org/linux-ubifsLinus Torvalds1-0/+2
Pull UBI bufix from Richard Weinberger: "This contains a single bug fix for the UBI block driver" * tag 'upstream-4.1-rc4' of git://git.infradead.org/linux-ubifs: UBI: block: Add missing cache flushes
2015-05-16Merge tag 'for_linus_stable' of ↵Linus Torvalds8-21/+53
git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 Pull ext4 fixes from Ted Ts'o: "Fix a number of ext4 bugs; the most serious of which is a bug in the lazytime mount optimization code where we could end up updating the timestamps to the wrong inode" * tag 'for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: ext4: fix an ext3 collapse range regression in xfstests jbd2: fix r_count overflows leading to buffer overflow in journal recovery ext4: check for zero length extent explicitly ext4: fix NULL pointer dereference when journal restart fails ext4: remove unused function prototype from ext4.h ext4: don't save the error information if the block device is read-only ext4: fix lazytime optimization
2015-05-16Merge branch 'for-linus-4.1' of ↵Linus Torvalds4-10/+68
git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs Pull btrfs fixes from Chris Mason: "The first commit is a fix from Filipe for a very old extent buffer reuse race that triggered a BUG_ON. It hasn't come up often, I looked through old logs at FB and we hit it a handful of times over the last year. The rest are other corners he hit during testing" * 'for-linus-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: Btrfs: fix race when reusing stale extent buffers that leads to BUG_ON Btrfs: fix race between block group creation and their cache writeout Btrfs: fix panic when starting bg cache writeout after IO error Btrfs: fix crash after inode cache writeback failure
2015-05-16Merge branch 'master' of git://git.linux-mips.org/pub/scm/ralf/upstream-linusLinus Torvalds9-17/+10
Pull MIPS fixes from Ralf Baechle: "Seven small fixes. The shortlog below is a good description so no need to elaborate. It has sat in linux-next and survived the usual automated testing by Imagination's test farm" * 'master' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: MIPS: tlb-r4k: Fix PG_ELPA comment MIPS: Fix up obsolete cpu_set usage MIPS: IP32: Fix build errors in reset code in DS1685 platform hook. MIPS: KVM: Fix unused variable build warning MIPS: traps: remove extra Tainted: line from __show_regs() output MIPS: Fix wrong CHECKFLAGS (sparse builds) with GCC 5.1 MIPS: Fix a preemption issue with thread's FPU defaults
2015-05-16Merge tag 'arc-4.1-fixes' of ↵Linus Torvalds3-16/+3
git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc Pull ARC fixes from Vineet Gupta. * tag 'arc-4.1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc: ARC: inline cache flush toggle helpers ARC: With earlycon in use, retire EARLY_PRINTK ARC: unbork !LLSC build
2015-05-16Merge tag 'fixes-for-linus' of ↵Linus Torvalds25-165/+199
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC fixes from Arnd Bergmann: "Nothing frightening this time, just smaller fixes in a number of places. The other changes contained here are: MAINTAINERS file updates: - The mach-gemini maintainer is back in action and has a new git tree - Krzysztof Kozlowski has volunteered to be a new co-maintainer for the samsung platforms - updates to the files that belong to Marvell mvebu Bug fixes: - The largest changes are on omap2, but are only to avoid some harmless warnings and to fix reset on omap4 - a small regression fix on tegra - multiple fixes for incorrect IRQ affinity on vexpress - the missing system controller on arm64 juno is added - one revert of a patch that was accidentally applied twice for mach-rockchip - two clock related DT fixes for mvebu - a workaround for suspend with old DT binaries on new exynos kernels - Another fix for suspend on exynos, needs to be backported" * tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (21 commits) MAINTAINERS: Add dts entries for some of the Marvell SoCs MAINTAINERS: ARM: EXYNOS: Add Krzysztof Kozlowski as co-maintainer ARM: EXYNOS: Use of_machine_is_compatible instead of soc_is_exynos4 ARM: EXYNOS: Fix failed second suspend on Exynos4 Revert "ARM: rockchip: fix undefined instruction of reset_ctrl_regs" ARM: EXYNOS: Fix dereference of ERR_PTR returned by of_genpd_get_from_provider ARM: EXYNOS: Don't try to initialize suspend on old DT ARM: dts: Add keep-power-in-suspend to WiFi SDIO node for Peach Boards ARM: gemini: fix compiler warning due wrong data type ARM: vexpress/tc2: Add interrupt-affinity to the PMU node ARM: vexpress/ca9: Add interrupt-affinity to the PMU node ARM: vexpress/ca9: Add unified-cache property to l2 cache node ARM64: juno: add sp810 support and fix sp804 clock frequency ARM: Gemini: Maintainers update ARM: OMAP2+: Remove bogus struct clk comparison for timer clock ARM: dove: Add clock-names to CuBox Si5351 clk generator ARM: AM33xx+: hwmod: re-use omap4 implementations for reset functionality ARM: OMAP4+: PRM: add support for passing status register/bit info to reset ARM: AM43xx: hwmod: add VPFE hwmod entries ARM: mvebu: Fix the main PLL frequency on Armada 375, 38x and 39x SoCs ...
2015-05-16Merge branch 'for-rc' of ↵Linus Torvalds4-51/+50
git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux Pull thermal fixes from Zhang Rui: "Specifics: - fix an issue in intel_powerclamp driver that idle injection target is not accurately maintained on newer Intel CPUs. Package C8 to C10 states are introduced on these CPUs but they were not included in the package c-state residency calculation. From Jacob Pan. - fix a problem that package c-state idle injection was missing on Broadwell server, by adding its id to intel_powerclamp driver. From Jacob Pan. - a couple of small fixes and cleanups from Joe Perches, Mathias Krause, Dan Carpenter and Anand Moon" * 'for-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux: tools/thermal: tmon: fixed the 'make install' command thermal: rockchip: fix an error code thermal/powerclamp: fix missing newer package c-states thermal/intel_powerclamp: add id for broadwell server thermal/intel_powerclamp: add __init / __exit annotations thermal: Use bool function return values of true/false not 1/0
2015-05-16Merge tag 'linux-kselftest-4.1-rc4' of ↵Linus Torvalds5-35/+69
git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest Pull kselftest fixes from Shuah Khan: "Urgent fix for Kselftest regression introduced in 4.1-rc1 by the new x86 test due to its hard dependency on 32-bit build environment. A set of 5 patches fix the make kselftest run and kselftest install" * tag 'linux-kselftest-4.1-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: selftests, x86: Rework x86 target architecture detection selftests, x86: Remove useless run_tests rule selftests/x86: install tests selftest/x86: have no dependency on all when cross building selftest/x86: build both bitnesses
2015-05-15Merge branch 'parisc-4.1-2' of ↵Linus Torvalds5-5/+17
git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux Pull parisc fixes from Helge Deller: "One important patch which fixes crashes due to stack randomization on architectures where the stack grows upwards (currently parisc and metag only). This bug went unnoticed on parisc since kernel 3.14 where the flexible mmap memory layout support was added by commit 9dabf60dc4ab. The changes in fs/exec.c are inside an #ifdef CONFIG_STACK_GROWSUP section and will not affect other platforms. The other two patches rename args of the kthread_arg() function and fixes a printk output" * 'parisc-4.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux: parisc,metag: Fix crashes due to stack randomization on stack-grows-upwards architectures parisc: copy_thread(): rename 'arg' argument to 'kthread_arg' parisc: %pf is only for function pointers
2015-05-15Documentation: dt: mtd: replace "nor-jedec" binding with "jedec, spi-nor"Brian Norris2-6/+6
In commit 8ff16cf77ce3 ("Documentation: devicetree: m25p80: add "nor-jedec" binding"), we added a generic "nor-jedec" binding to catch all mostly-compatible SPI NOR flash which can be detected via the READ ID opcode (0x9F). This was discussed and reviewed at the time, however objections have come up since then as part of this discussion: http://lkml.kernel.org/g/20150511224646.GJ32500@ld-irv-0074 It seems the parties involved agree that "jedec,spi-nor" does a better job of capturing the fact that this is SPI-specific, not just any NOR flash. This binding was only merged for v4.1-rc1, so it's still OK to change the naming. At the same time, let's move the documentation to a better name. Next up: stop referring to code (drivers/mtd/devices/m25p80.c) from the documentation. Signed-off-by: Brian Norris <computersforpeace@gmail.com> Cc: Marek Vasut <marex@denx.de> Cc: Rafał Miłecki <zajec5@gmail.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: Pawel Moll <pawel.moll@arm.com> Cc: Ian Campbell <ijc+devicetree@hellion.org.uk> Cc: Kumar Gala <galak@codeaurora.org> Cc: devicetree@vger.kernel.org Acked-by: Stephen Warren <swarren@nvidia.com> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: Mark Rutland <mark.rutland@arm.com>
2015-05-15MIPS: tlb-r4k: Fix PG_ELPA commentJames Hogan1-1/+1
The ELPA bit in PageGrain is all about large *physical* addresses, so correct the reference to "large virtual address" in the comment above where it is set for MIPS64. Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: David Daney <ddaney@caviumnetworks.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/10038/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2015-05-15MIPS: Fix up obsolete cpu_set usageEzequiel Garcia1-1/+1
cpu_set was removed (along with a bunch of cpumask helpers) by commit 2f0f267ea072 ("cpumask: remove deprecated functions."). Fix this by replacing cpu_set with cpumask_set_cpu. Without this fix the following error is triggered when CONFIG_MIPS_MT_FPAFF=y. arch/mips/kernel/smp-cps.c: In function 'cps_smp_setup': arch/mips/kernel/smp-cps.c:95:3: error: implicit declaration of function 'cpu_set' [-Werror=implicit-function-declaration] Fixes: 90db024f140d ("MIPS: smp-cps: cpu_set FPU mask if FPU present") Signed-off-by: Ezequiel Garcia <ezequiel.garcia@imgtec.com> Acked-by: Niklas Cassel <niklass@axis.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/9912/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2015-05-15Merge branch 'x86-urgent-for-linus' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 build fix from Ingo Molnar: "A bzImage build fix on older distros" * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/vdso: Fix 'make bzImage' on older distros
2015-05-15Merge branch 'sched-urgent-for-linus' of ↵Linus Torvalds3-36/+37
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull scheduler fixes from Ingo Molnar: "Two fixes: a suspend/resume related regression fix, and an RT priority boosting fix" * 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: sched/core: Fix regression in cpuset_cpu_inactive() for suspend sched: Handle priority boosted tasks proper in setscheduler()
2015-05-15Merge branch 'perf-urgent-for-linus' of ↵Linus Torvalds6-14/+43
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf fixes from Ingo Molnar: "Mostly tooling fixes, but also a lockdep annotation fix, a PMU event list fix and a new model addition" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: tools/liblockdep: Fix compilation error tools/liblockdep: Fix linker error in case of cross compile perf tools: Use getconf to determine number of online CPUs tools: Fix tools/vm build perf/x86/rapl: Enable Broadwell-U RAPL support perf/x86/intel: Fix SLM cache event list perf: Annotate inherited event ctx->mutex recursion
2015-05-15Merge branch 'irq-urgent-for-linus' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull irq fix from Ingo Molnar: "A tegra irqchip driver memory corruption fix" * 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: irqchip: tegra: Set the proper base address in irq chip data
2015-05-15Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linuxLinus Torvalds9-12/+24
Pull drm fixes from Dave Airlie: "Radeon: one oops fix, one bug fix, one pci id addition patch i915: one suspend/resume regression fix. All seems quiet enough." * 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: drm/radeon: don't do mst probing if MST isn't enabled. drm/radeon: add new bonaire pci id drm/radeon: fix VM_CONTEXT*_PAGE_TABLE_END_ADDR handling drm/i915: Avoid GPU hang when coming out of s3 or s4
2015-05-15Merge branch 'akpm' (patches from Andrew)Linus Torvalds10-13/+28
Merge misc fixes from Andrew Morton: "8 fixes" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: mm, numa: really disable NUMA balancing by default on single node machines MAINTAINERS: update Jingoo Han's email address CMA: page_isolation: check buddy before accessing it uidgid: make uid_valid and gid_valid work with !CONFIG_MULTIUSER kernfs: do not account ino_ida allocations to memcg gfp: add __GFP_NOACCOUNT tools/vm: fix page-flags build drivers/rtc/rtc-armada38x.c: remove unused local `flags'
2015-05-15Merge tag 'samsung-fixes-2' of ↵Arnd Bergmann7-40/+41
git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into fixes Merge "Samsung 2nd fixes for v4.1" from Kukjin Kim: - fix second S2R on exynos4412 based Trats2, Odroid U3 boards which happened after enabling L2$ and caused by commit 13cfa6c4f7fa ("ARM: EXYNOS: Fix CPU idle clock down after CPU off") And replace the soc_is_exynosxxx() macro with of_compatible_xxx - fix dereference of ERR_PTR of of_genpd_get_from_provider() - fix suspend problem on old DT machines to skip the initialization suspend and caused by commit 8b283c025443 ("ARM: exynos4/5: convert pmu wakeup to stacked domains") - add keep-power-in-suspend for Peach Boards to support S2R and has been missed in previous pull-request for fixes * tag 'samsung-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung: ARM: EXYNOS: Use of_machine_is_compatible instead of soc_is_exynos4 ARM: EXYNOS: Fix failed second suspend on Exynos4 ARM: EXYNOS: Fix dereference of ERR_PTR returned by of_genpd_get_from_provider ARM: EXYNOS: Don't try to initialize suspend on old DT ARM: dts: Add keep-power-in-suspend to WiFi SDIO node for Peach Boards
2015-05-15Merge tag 'mvebu-fixes-4.1-2' of git://git.infradead.org/linux-mvebu into fixesArnd Bergmann5-4/+13
Merge "mvebu fixes for 4.1 (part 2)" from Gregory CLEMENT: Fix the main PLL frequency on Armada 375, 38x and 39x SoCs Add clock-names to CuBox Si5351 clk generator Add dts entries in the MAINTAINERS file * tag 'mvebu-fixes-4.1-2' of git://git.infradead.org/linux-mvebu: MAINTAINERS: Add dts entries for some of the Marvell SoCs ARM: dove: Add clock-names to CuBox Si5351 clk generator ARM: mvebu: Fix the main PLL frequency on Armada 375, 38x and 39x SoCs
2015-05-15MAINTAINERS: Add dts entries for some of the Marvell SoCsGregory CLEMENT1-1/+9
Since many releases, the modifications of the mvebu and berlin device tree files are merged through the mvebu subsystem. This patch makes it official in order to help the contributors using the get_maintainer.pl to find the accurate peoples. In the same time, updated the mvebu description which now includes the kirkwood SoCs and new Armada SoCs. Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com> Acked-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> Acked-by: Jason Cooper <jason@lakedaemon.net> Acked-by: Andrew Lunn <andrew@lunn.ch>
2015-05-15Merge branch 'liblockdep-fixes' of ↵Ingo Molnar2-1/+5
git://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux into perf/urgent Pull liblockdep fixes from Sasha Levin: "two fixes that deal with compilation errors in liblockdep." Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-05-15Merge tag 'drm-intel-fixes-2015-05-13' of ↵Dave Airlie1-3/+10
git://anongit.freedesktop.org/drm-intel into drm-fixes fix one gpu hang on resume. * tag 'drm-intel-fixes-2015-05-13' of git://anongit.freedesktop.org/drm-intel: drm/i915: Avoid GPU hang when coming out of s3 or s4
2015-05-15Merge branch 'drm-fixes-4.1' of git://people.freedesktop.org/~agd5f/linux ↵Dave Airlie8-9/+14
into drm-fixes radeon minor fixes, and pci id addition. * 'drm-fixes-4.1' of git://people.freedesktop.org/~agd5f/linux: drm/radeon: don't do mst probing if MST isn't enabled. drm/radeon: add new bonaire pci id drm/radeon: fix VM_CONTEXT*_PAGE_TABLE_END_ADDR handling
2015-05-15ext4: fix an ext3 collapse range regression in xfstestsTheodore Ts'o1-0/+8
The xfstests test suite assumes that an attempt to collapse range on the range (0, 1) will return EOPNOTSUPP if the file system does not support collapse range. Commit 280227a75b56: "ext4: move check under lock scope to close a race" broke this, and this caused xfstests to fail when run when testing file systems that did not have the extents feature enabled. Reported-by: Eric Whitney <enwlinux@gmail.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2015-05-14Merge tag 'pm+acpi-4.1-rc4' of ↵Linus Torvalds2-14/+5
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull ACPI fixes from Rafael Wysocki: "Two fixes here, one revert of a recent ACPICA commit that broke audio support on one Dell machine and a fix for a long-standing issue that may cause systems to break randomly during boot. Specifics: - The recent ACPICA commit that set the ACPI _REV return value to 2 (which is the value always used by Windows and now mandated by the spec too) in order to prevent the firmware people from using it to play tricks with us caused a serious audio regression to happen on Dell XPS 13 (the AML on that machine uses the _REV return value to decide how to expose audio to the OS and does that to hide the lack of proper support for its I2S audio in Linux), so revert that commit for now and we'll revisit the issue in the next cycle. - Ensure that the ordering of acpi_reserve_resources() with respect to the rest of the ACPI initialization sequence will always be the same, or the IO or memory region occupied by the ACPI fixed registers may be assigned to a PCI host bridge as a result of a race and random breakage ensues going forward" * tag 'pm+acpi-4.1-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: Revert "ACPICA: Permanently set _REV to the value '2'." ACPI / init: Fix the ordering of acpi_reserve_resources()
2015-05-14Merge tag 'arm64-fixes' of ↵Linus Torvalds4-57/+8
git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull arm64 fixes from Will Deacon: - fix potential memory leak in perf PMU probing - BPF sign extension fix for 64-bit immediates - fix build failure with unusual configuration - revert unused and broken branch patching from alternative code * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: arm64: perf: fix memory leak when probing PMU PPIs arm64: bpf: fix signedness bug in loading 64-bit immediate arm64: mm: Fix build error with CONFIG_SPARSEMEM_VMEMMAP disabled Revert "arm64: alternative: Allow immediate branch as alternative instruction"
2015-05-14Merge branch 'dmi-for-linus' of ↵Linus Torvalds1-6/+6
git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging Pull dmi fixes from Jean Delvare. * 'dmi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging: firmware: dmi_scan: Fix ordering of product_uuid firmware: dmi_scan: Simplified displayed version
2015-05-14mm, numa: really disable NUMA balancing by default on single node machinesMel Gorman1-1/+1
NUMA balancing is meant to be disabled by default on UMA machines but the check is using nr_node_ids (highest node) instead of num_online_nodes (online nodes). The consequences are that a UMA machine with a node ID of 1 or higher will enable NUMA balancing. This will incur useless overhead due to minor faults with the impact depending on the workload. These are the impact on the stats when running a kernel build on a single node machine whose node ID happened to be 1: vanilla patched NUMA base PTE updates 5113158 0 NUMA huge PMD updates 643 0 NUMA page range updates 5442374 0 NUMA hint faults 2109622 0 NUMA hint local faults 2109622 0 NUMA hint local percent 100 100 NUMA pages migrated 0 0 Signed-off-by: Mel Gorman <mgorman@suse.de> Reviewed-by: Rik van Riel <riel@redhat.com> Cc: <stable@vger.kernel.org> [3.8+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-05-14MAINTAINERS: update Jingoo Han's email addressJingoo Han1-5/+5
Change my private email address. Signed-off-by: Jingoo Han <jingoohan1@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-05-14CMA: page_isolation: check buddy before accessing itHui Zhu1-1/+2
I had an issue: Unable to handle kernel NULL pointer dereference at virtual address 0000082a pgd = cc970000 [0000082a] *pgd=00000000 Internal error: Oops: 5 [#1] PREEMPT SMP ARM PC is at get_pageblock_flags_group+0x5c/0xb0 LR is at unset_migratetype_isolate+0x148/0x1b0 pc : [<c00cc9a0>] lr : [<c0109874>] psr: 80000093 sp : c7029d00 ip : 00000105 fp : c7029d1c r10: 00000001 r9 : 0000000a r8 : 00000004 r7 : 60000013 r6 : 000000a4 r5 : c0a357e4 r4 : 00000000 r3 : 00000826 r2 : 00000002 r1 : 00000000 r0 : 0000003f Flags: Nzcv IRQs off FIQs on Mode SVC_32 ISA ARM Segment user Control: 10c5387d Table: 2cb7006a DAC: 00000015 Backtrace: get_pageblock_flags_group+0x0/0xb0 unset_migratetype_isolate+0x0/0x1b0 undo_isolate_page_range+0x0/0xdc __alloc_contig_range+0x0/0x34c alloc_contig_range+0x0/0x18 This issue is because when calling unset_migratetype_isolate() to unset a part of CMA memory, it try to access the buddy page to get its status: if (order >= pageblock_order) { page_idx = page_to_pfn(page) & ((1 << MAX_ORDER) - 1); buddy_idx = __find_buddy_index(page_idx, order); buddy = page + (buddy_idx - page_idx); if (!is_migrate_isolate_page(buddy)) { But the begin addr of this part of CMA memory is very close to a part of memory that is reserved at boot time (not in buddy system). So add a check before accessing it. [akpm@linux-foundation.org: use conventional code layout] Signed-off-by: Hui Zhu <zhuhui@xiaomi.com> Suggested-by: Laura Abbott <labbott@redhat.com> Suggested-by: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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