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2017-06-13Merge branch 'sched/urgent' into x86/mm, to pick up dependent fixIngo Molnar
Andy will need the following scheduler fix for the PCID series: 252d2a4117bc: sched/core: Idle_task_exit() shouldn't use switch_mm_irqs_off() So do a cross-merge. Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-06-13Merge branch 'for-mingo' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu Pull RCU updates from Paul E. McKenney: "The largest feature of this series is shrinking and simplification, with the following diffstat summary: 79 files changed, 1496 insertions(+), 4211 deletions(-) In other words, this series represents a net reduction of more than 2700 lines of code." Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-06-12Merge tag 'v4.12-rc5' into for-4.13/blockJens Axboe
We've already got a few conflicts and upcoming work depends on some of the changes that have gone into mainline as regression fixes for this series. Pull in 4.12-rc5 to resolve these conflicts and make it easier on down stream trees to continue working on 4.13 changes. Signed-off-by: Jens Axboe <axboe@kernel.dk>
2017-06-12ACPICA: Tables: Mechanism to handle late stage acpi_get_table() imbalanceLv Zheng
Considering this case: 1. A program opens a sysfs table file 65535 times, it can increase validation_count and first increment cause the table to be mapped: validation_count = 65535 2. AML execution causes "Load" to be executed on the same table, this time it cannot increase validation_count, so validation_count remains: validation_count = 65535 3. The program closes sysfs table file 65535 times, it can decrease validation_count and the last decrement cause the table to be unmapped: validation_count = 0 4. AML code still accessing the loaded table, kernel crash can be observed. To prevent that from happening, add a validation_count threashold. When it is reached, the validation_count can no longer be incremented/decremented to invalidate the table descriptor (means preventing table unmappings) Note that code added in acpi_tb_put_table() is actually a no-op but changes the warning message into a "warn once" one. Lv Zheng. Signed-off-by: Lv Zheng <lv.zheng@intel.com> [ rjw: Changelog, comments ] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-06-12configfs: Introduce config_item_get_unless_zero()Bart Van Assche
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> [hch: minor style tweak] Signed-off-by: Christoph Hellwig <hch@lst.de>
2017-06-11Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security Pull key subsystem fixes from James Morris: "Here are a bunch of fixes for Linux keyrings, including: - Fix up the refcount handling now that key structs use the refcount_t type and the refcount_t ops don't allow a 0->1 transition. - Fix a potential NULL deref after error in x509_cert_parse(). - Don't put data for the crypto algorithms to use on the stack. - Fix the handling of a null payload being passed to add_key(). - Fix incorrect cleanup an uninitialised key_preparsed_payload in key_update(). - Explicit sanitisation of potentially secure data before freeing. - Fixes for the Diffie-Helman code" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (23 commits) KEYS: fix refcount_inc() on zero KEYS: Convert KEYCTL_DH_COMPUTE to use the crypto KPP API crypto : asymmetric_keys : verify_pefile:zero memory content before freeing KEYS: DH: add __user annotations to keyctl_kdf_params KEYS: DH: ensure the KDF counter is properly aligned KEYS: DH: don't feed uninitialized "otherinfo" into KDF KEYS: DH: forbid using digest_null as the KDF hash KEYS: sanitize key structs before freeing KEYS: trusted: sanitize all key material KEYS: encrypted: sanitize all key material KEYS: user_defined: sanitize key payloads KEYS: sanitize add_key() and keyctl() key payloads KEYS: fix freeing uninitialized memory in key_update() KEYS: fix dereferencing NULL payload with nonzero length KEYS: encrypted: use constant-time HMAC comparison KEYS: encrypted: fix race causing incorrect HMAC calculations KEYS: encrypted: fix buffer overread in valid_master_desc() KEYS: encrypted: avoid encrypting/decrypting stack buffers KEYS: put keyring if install_session_keyring_to_cred() fails KEYS: Delete an error message for a failed memory allocation in get_derived_key() ...
2017-06-11compiler, clang: properly override 'inline' for clangLinus Torvalds
Commit abb2ea7dfd82 ("compiler, clang: suppress warning for unused static inline functions") just caused more warnings due to re-defining the 'inline' macro. So undef it before re-defining it, and also add the 'notrace' attribute like the gcc version that this is overriding does. Maybe this makes clang happier. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-06-11Merge tag 'ext4_for_linus_stable' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 Pull ext4 fixes from Ted Ts'o: "Fix various bug fixes in ext4 caused by races and memory allocation failures" * tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: ext4: fix fdatasync(2) after extent manipulation operations ext4: fix data corruption for mmap writes ext4: fix data corruption with EXT4_GET_BLOCKS_ZERO ext4: fix quota charging for shared xattr blocks ext4: remove redundant check for encrypted file on dio write path ext4: remove unused d_name argument from ext4_search_dir() et al. ext4: fix off-by-one error when writing back pages before dio read ext4: fix off-by-one on max nr_pages in ext4_find_unwritten_pgoff() ext4: keep existing extra fields when inode expands ext4: handle the rest of ext4_mb_load_buddy() ENOMEM errors ext4: fix off-by-in in loop termination in ext4_find_unwritten_pgoff() ext4: fix SEEK_HOLE jbd2: preserve original nofs flag during journal restart ext4: clear lockdep subtype for quota files on quota off
2017-06-11Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds
Pull KVM fixes from Paolo Bonzini: "Bug fixes (ARM, s390, x86)" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: async_pf: avoid async pf injection when in guest mode KVM: cpuid: Fix read/write out-of-bounds vulnerability in cpuid emulation arm: KVM: Allow unaligned accesses at HYP arm64: KVM: Allow unaligned accesses at EL2 arm64: KVM: Preserve RES1 bits in SCTLR_EL2 KVM: arm/arm64: Handle possible NULL stage2 pud when ageing pages KVM: nVMX: Fix exception injection kvm: async_pf: fix rcu_irq_enter() with irqs enabled KVM: arm/arm64: vgic-v3: Fix nr_pre_bits bitfield extraction KVM: s390: fix ais handling vs cpu model KVM: arm/arm64: Fix isues with GICv2 on GICv3 migration
2017-06-10Merge branch 'rcu-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull RCU fixes from Ingo Molnar: "Fix an SRCU bug affecting KVM IRQ injection" * 'rcu-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: srcu: Allow use of Classic SRCU from both process and interrupt context srcu: Allow use of Tiny/Tree SRCU from both process and interrupt context
2017-06-09Merge tag 'iommu-fixes-v4.12-rc4' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu Pull IOMMU fixes from Joerg Roedel: - another compile-fix for my header cleanup - a couple of fixes for the recently merged IOMMU probe deferal code - fixes for ACPI/IORT code necessary with IOMMU probe deferal * tag 'iommu-fixes-v4.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: arm: dma-mapping: Reset the device's dma_ops ACPI/IORT: Move the check to get iommu_ops from translated fwspec ARM: dma-mapping: Don't tear down third-party mappings ACPI/IORT: Ignore all errors except EPROBE_DEFER iommu/of: Ignore all errors except EPROBE_DEFER iommu/of: Fix check for returning EPROBE_DEFER iommu/dma: Fix function declaration
2017-06-09Merge branch 'for-linus' of git://git.kernel.dk/linux-blockLinus Torvalds
Pull block fixes from Jens Axboe: "A set of fixes in the area of block IO, that should go into the next -rc release. This contains: - An OOPS fix from Dmitry, fixing a regression with the bio integrity code in this series. - Fix truncation of elevator io context cache name, from Eric Biggers. - NVMe pull from Christoph includes FC fixes from James, APST fixes/tweaks from Kai-Heng, removal fix from Rakesh, and an RDMA fix from Sagi. - Two tweaks for the block throttling code. One from Joseph Qi, fixing an oops from the timer code, and one from Shaohua, improving the behavior on rotatonal storage. - Two blk-mq fixes from Ming, fixing corner cases with the direct issue code. - Locking fix for bfq cgroups from Paolo" * 'for-linus' of git://git.kernel.dk/linux-block: block, bfq: access and cache blkg data only when safe Fix loop device flush before configure v3 blk-throttle: set default latency baseline for harddisk blk-throttle: fix NULL pointer dereference in throtl_schedule_pending_timer nvme: relax APST default max latency to 100ms nvme: only consider exit latency when choosing useful non-op power states nvme-fc: fix missing put reference on controller create failure nvme-fc: on lldd/transport io error, terminate association nvme-rdma: fast fail incoming requests while we reconnect nvme-pci: fix multiple ctrl removal scheduling nvme: fix hang in remove path elevator: fix truncation of icq_cache_name blk-mq: fix direct issue blk-mq: pass correct hctx to blk_mq_try_issue_directly bio-integrity: Do not allocate integrity context for bio w/o data
2017-06-09dm: bump DM_VERSION_MINOR in response to target method error code changesMike Snitzer
Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2017-06-09block: switch bios to blk_status_tChristoph Hellwig
Replace bi_error with a new bi_status to allow for a clear conversion. Note that device mapper overloaded bi_error with a private value, which we'll have to keep arround at least for now and thus propagate to a proper blk_status_t value. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@fb.com>
2017-06-09blk-mq: switch ->queue_rq return value to blk_status_tChristoph Hellwig
Use the same values for use for request completion errors as the return value from ->queue_rq. BLK_STS_RESOURCE is special cased to cause a requeue, and all the others are completed as-is. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@fb.com>
2017-06-09block: introduce new block status code typeChristoph Hellwig
Currently we use nornal Linux errno values in the block layer, and while we accept any error a few have overloaded magic meanings. This patch instead introduces a new blk_status_t value that holds block layer specific status codes and explicitly explains their meaning. Helpers to convert from and to the previous special meanings are provided for now, but I suspect we want to get rid of them in the long run - those drivers that have a errno input (e.g. networking) usually get errnos that don't know about the special block layer overloads, and similarly returning them to userspace will usually return somethings that strictly speaking isn't correct for file system operations, but that's left as an exercise for later. For now the set of errors is a very limited set that closely corresponds to the previous overloaded errno values, but there is some low hanging fruite to improve it. blk_status_t (ab)uses the sparse __bitwise annotations to allow for sparse typechecking, so that we can easily catch places passing the wrong values. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@fb.com>
2017-06-09dm: change ->end_io calling conventionChristoph Hellwig
Turn the error paramter into a pointer so that target drivers can change the value, and make sure only DM_ENDIO_* values are returned from the methods. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2017-06-09fs: remove the unused error argument to dio_end_io()Christoph Hellwig
Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Bart Van Assche <Bart.VanAssche@sandisk.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2017-06-09Merge branch 'rcu/urgent' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into rcu/urgent Pull RCU fix from Paul E. McKenney: " This series enables srcu_read_lock() and srcu_read_unlock() to be used from interrupt handlers, which fixes a bug in KVM's use of SRCU in delivery of interrupts to guest OSes. " Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-06-09KEYS: DH: add __user annotations to keyctl_kdf_paramsEric Biggers
Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Stephan Mueller <smueller@chronox.de> Signed-off-by: James Morris <james.l.morris@oracle.com>
2017-06-09KEYS: sanitize key structs before freeingEric Biggers
While a 'struct key' itself normally does not contain sensitive information, Documentation/security/keys.txt actually encourages this: "Having a payload is not required; and the payload can, in fact, just be a value stored in the struct key itself." In case someone has taken this advice, or will take this advice in the future, zero the key structure before freeing it. We might as well, and as a bonus this could make it a bit more difficult for an adversary to determine which keys have recently been in use. This is safe because the key_jar cache does not use a constructor. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: James Morris <james.l.morris@oracle.com>
2017-06-08srcu: Remove Classic SRCUPaul E. McKenney
Classic SRCU was only ever intended to be a fallback in case of issues with Tree/Tiny SRCU, and the latter two are doing quite well in testing. This commit therefore removes Classic SRCU. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2017-06-08rcu: Remove SPARSE_RCU_POINTER Kconfig optionPaul E. McKenney
The sparse-based checking for non-RCU accesses to RCU-protected pointers has been around for a very long time, and it is now the only type of sparse-based checking that is optional. This commit therefore makes it unconditional. Reported-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Fengguang Wu <fengguang.wu@intel.com>
2017-06-08rcu: Remove #ifdef moving rcu_end_inkernel_boot from rcupdate.hPaul E. McKenney
This commit removes a #ifdef and saves a few lines of code by moving the rcu_end_inkernel_boot() function from include/linux/rcupdate.h to include/linux/rcutiny.h (for TINY_RCU) and to include/linux/rcutree.h (for TREE_RCU). Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2017-06-08rcu: Remove nohz_full full-system-idle state machinePaul E. McKenney
The NO_HZ_FULL_SYSIDLE full-system-idle capability was added in 2013 by commit 0edd1b1784cb ("nohz_full: Add full-system-idle state machine"), but has not been used. This commit therefore removes it. If it turns out to be needed later, this commit can always be reverted. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Rik van Riel <riel@redhat.com> Cc: Ingo Molnar <mingo@kernel.org> Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-06-08srcu: Use rnp->lock wrappers to replace explicit memory barriersPaul E. McKenney
This commit uses TREE RCU's rnp->lock wrappers to replace a few explicit memory barriers. This change also has the advantage of making SRCU's memory-ordering properties be implemented in roughly the same way as they are in Tree RCU. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2017-06-08rcu: Refactor #includes from include/linux/rcupdate.hPaul E. McKenney
The list of #includes from include/linux/rcupdate.h has grown quite a bit, so it is time to trim it. This commit moves the #include of include/linux/ktime.h to include/linux/rcutiny.h, along with the Tiny-RCU-only function that was the only thing needing ktimem.h. It then reconstructs the files included into include/linux/ktime.h based on what is actually needed, with significant help from the 0day Test Robot. This single change reduces the .i file footprint from rcupdate.h from 9018 lines to 7101 lines. Reported-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2017-06-08bcm47xx: Fix build regressionArnd Bergmann
Commit 0bc2d534708b ("rcu: Refactor #includes from include/linux/rcupdate.h") caused a build regression in an MTD partition driver: In file included from drivers/mtd/bcm47xxpart.c:12:0: include/linux/bcm47xx_nvram.h: In function 'bcm47xx_nvram_init_from_mem': include/linux/bcm47xx_nvram.h:27:10: error: 'ENOTSUPP' undeclared (first use in this function) The rcupdate.h file has no particular need for linux/errno.h, so this commit includes linux/errno.h into bcm47xx_nvram.h. Fixes: 0bc2d534708b ("rcu: Refactor #includes from include/linux/rcupdate.h") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2017-06-08srcu: Apply trivial callback lists to shrink Tiny SRCUPaul E. McKenney
The rcu_segcblist structure provides quite a bit of functionality, and Tiny SRCU needs almost none of it. So this commit replaces Tiny SRCU's uses of rcu_segcblist with a simple singly linked list with tail pointer. This change significantly reduces Tiny SRCU's memory footprint, more than making up for the growth caused by the creation of rcu_segcblist.c Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2017-06-08srcu: Shrink srcu.h by moving docbook and private functionPaul E. McKenney
The call_srcu() docbook entry is currently in include/linux/srcu.h, which causes needless processing for each include point. This commit therefore moves this entry to kernel/rcu/srcutree.c, which the compiler reads only once. In addition, the srcu_batches_completed() function is used only within RCU and its torture-test suites. This commit therefore also moves this function's declaration from include/linux/srcutiny.h, include/linux/srcutree.h, and include/linux/srcuclassic.h to kernel/rcu/rcu.h. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2017-06-08rcu: Move rcutiny.h to new empty/true/false-function stylePaul E. McKenney
This commit saves a few lines in include/linux/rcutiny.h by moving to single-line definitions for empty functions, instead of the old style where the two curly braces each get their own line. Reported-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2017-06-08rcu: Move rcu_request_urgent_qs_task() out of rcutiny.h and rcutree.hPaul E. McKenney
The rcu_request_urgent_qs_task() function is used only within RCU, so there is no point in exporting it to the rest of the kernel from nclude/linux/rcutiny.h and include/linux/rcutree.h. This commit therefore moves this function to kernel/rcu/rcu.h. Reported-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2017-06-08rcu: Move torture-related functions out of rcutiny.h and rcutree.hPaul E. McKenney
The various functions similar to rcu_batches_started(), the function show_rcu_gp_kthreads(), the various functions similar to rcu_force_quiescent_state(), and the variables rcutorture_testseq and rcutorture_vernum are used only within RCU. There is therefore no point in exporting them to the kernel at large from include/linux/rcutiny.h and include/linux/rcutree.h. This commit therefore moves all of these to kernel/rcu/rcu.h. Reported-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2017-06-08rcu: move rcupdate.h to the new true/false-function stylePaul E. McKenney
This commit saves a few lines in include/linux/rcupdate.h by moving to single-line definitions for functions that just return either true or false, instead of the old style where the two curly braces each get their own line. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2017-06-08rcu: Move rcu_ftrace_dump() from rcupdate.h to rcu.hPaul E. McKenney
The rcu_ftrace_dump() function is used only internally to RCU. This commit therefore moves its declaration from include/linux/rcupdate.h to kernel/rcu/rcu.h. Reported-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2017-06-08rcu: Move rcu_is_nocb_cpu() from rcupdate.h to rcu.hPaul E. McKenney
The rcu_is_nocb_cpu() function is used only internally to RCU. This commit therefore moves its declaration from include/linux/rcupdate.h to kernel/rcu/rcu.h. Reported-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2017-06-08rcu: Remove linux/debugobjects.h from rcupdate.hPaul E. McKenney
The include/linux/rcupdate.h file does not actually need anything from linux/debugobjects.h, so this commit removes the inclusion. Reported-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2017-06-08rcu: Move the RCU_SCHEDULER_ definitions from rcupdate.hPaul E. McKenney
The RCU_SCHEDULER_INACTIVE, RCU_SCHEDULER_INIT, and RCU_SCHEDULER_RUNNING definitions are used only within RCU, so this commit moves them from include/linux/rcupdate.h to kernel/rcu/rcu.h. Reported-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2017-06-08rcu: Eliminate the unused __rcu_is_watching() functionPaul E. McKenney
The __rcu_is_watching() function is currently not used, aside from to implement the rcu_is_watching() function. This commit therefore eliminates __rcu_is_watching(), which has the beneficial side-effect of shrinking include/linux/rcupdate.h a bit. Reported-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2017-06-08rcu: Move rcupdate.h to new empty-function stylePaul E. McKenney
This commit saves a few lines in include/linux/rcupdate.h by moving to single-line definitions for empty functions, instead of the old style where the two curly braces each get their own line. Reported-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2017-06-08rcu: Remove UINT_CMP_GE() and UINT_CMP_LT()Paul E. McKenney
The UINT_CMP_GE() and UINT_CMP_LT() macros are not used, so this commit removes them. Reported-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2017-06-08rcu: Move torture-related definitions from rcupdate.h to rcu.hPaul E. McKenney
The include/linux/rcupdate.h file contains a number of definitions that are used only to communicate between rcutorture, rcuperf, and the RCU code itself. There is no point in having these definitions exposed globally throughout the kernel, so this commit moves them to kernel/rcu/rcu.h. This change has the added benefit of shrinking rcupdate.h. Reported-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2017-06-08rcu: Move expediting-related access/control out of rcupdate.hPaul E. McKenney
The rcu_gp_is_normal(), rcu_gp_is_expedited(), rcu_expedite_gp(), and rcu_unexpedite_gp() functions are intended only for use within the RCU implementation itself -- the sysfs access is what should be used outside of RCU. This commit therefore moves the declarations for these functions to kernel/rcu/rcu.h, and also includes this file into kernel/rcu/rcutorture.c and kernel/rcu/rcuperf.c. This also has the beneficial effect of shrinking rcupdate.c a bit. Reported-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2017-06-08rcu: Move rcu_expedited and rcu_normal externs from rcupdate.hPaul E. McKenney
The rcu_expedited and rcu_normal variables are used only by sysctl and kernel/rcu/update.c, so it does not make sense to their extern declarations in rcupdate.h. This commit therefore moves these extern declarations to update.c. Reported-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2017-06-08rcu: Move docbook comments out of rcupdate.hPaul E. McKenney
The include/linux/rcupdate.h file is included by more than 200 files, so shrinking it should provide some build-time benefits. This commit therefore moves several docbook comments from rcupdate.h to kernel/rcu/update.c, kernel/rcu/tree.c, and kernel/rcu/tree_plugin.h, thus reducing the number of times that the compiler has to scan these comments. This likely provides only a small benefit, but every little bit helps. This commit also fixes a malformed bulleted list noted by the 0day Test Robot. Reported-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2017-06-08rcu: Flag need for rcu_node_tree.h and rcu_segcblist.h visibilityPaul E. McKenney
The rcu_node_tree.h and rcu_segcblist.h header files in the include/linux directory might appear at first sight to be internal to the RCU implementation. However, the definitions in these files are needed to determine the size of TREE SRCU's srcu_struct structure, so they must be externally visible, which is why they live in include/linux. This commit adds comments to this effect to those files. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2017-06-08Merge tag 'pm-4.12-rc5' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull power management fixes from Rafael Wysocki: "These revert one problematic commit related to system sleep and fix one recent intel_pstate regression. Specifics: - Revert a recent commit that attempted to avoid spurious wakeups from suspend-to-idle via ACPI SCI, but introduced regressions on some systems (Rafael Wysocki). We will get back to the problem it tried to address in the next cycle. - Fix a possible division by 0 during intel_pstate initialization due to a missing check (Rafael Wysocki)" * tag 'pm-4.12-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: Revert "ACPI / sleep: Ignore spurious SCI wakeups from suspend-to-idle" cpufreq: intel_pstate: Avoid division by 0 in min_perf_pct_min()
2017-06-09Merge branches 'intel_pstate' and 'pm-sleep'Rafael J. Wysocki
* intel_pstate: cpufreq: intel_pstate: Avoid division by 0 in min_perf_pct_min() * pm-sleep: Revert "ACPI / sleep: Ignore spurious SCI wakeups from suspend-to-idle"
2017-06-08ethtool.h: remind to update 802.3ad when adding new speedsNicolas Dichtel
Each time a new speed is added, the bonding 802.3ad isn't updated. Add a comment to remind the developer to update this driver. Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Acked-by: Andy Gospodarek <andy@greyhouse.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-06-08openvswitch: warn about missing first netlink attributeNicolas Dichtel
The first netlink attribute (value 0) must always be defined as none/unspec. Because we cannot change an existing UAPI, I add a comment to point the mistake and avoid to propagate it in a new ovs API in the future. Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: David S. Miller <davem@davemloft.net>