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2017-05-01Merge branch 'locking-core-for-linus' of ↵Linus Torvalds1-44/+125
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull locking updates from Ingo Molnar: "The main changes in this cycle were: - a big round of FUTEX_UNLOCK_PI improvements, fixes, cleanups and general restructuring - lockdep updates such as new checks for lock_downgrade() - introduce the new atomic_try_cmpxchg() locking API and use it to optimize refcount code generation - ... plus misc fixes, updates and cleanups" * 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (38 commits) MAINTAINERS: Add FUTEX SUBSYSTEM futex: Clarify mark_wake_futex memory barrier usage futex: Fix small (and harmless looking) inconsistencies futex: Avoid freeing an active timer rtmutex: Plug preempt count leak in rt_mutex_futex_unlock() rtmutex: Fix more prio comparisons rtmutex: Fix PI chain order integrity sched,tracing: Update trace_sched_pi_setprio() sched/rtmutex: Refactor rt_mutex_setprio() rtmutex: Clean up sched/deadline/rtmutex: Dont miss the dl_runtime/dl_period update sched/rtmutex/deadline: Fix a PI crash for deadline tasks rtmutex: Deboost before waking up the top waiter locking/ww-mutex: Limit stress test to 2 seconds locking/atomic: Fix atomic_try_cmpxchg() semantics lockdep: Fix per-cpu static objects futex: Drop hb->lock before enqueueing on the rtmutex futex: Futex_unlock_pi() determinism futex: Rework futex_lock_pi() to use rt_mutex_*_proxy_lock() futex,rt_mutex: Restructure rt_mutex_finish_proxy_lock() ...
2017-05-01Merge branch 'for-linus' of ↵Linus Torvalds2-2/+1
git://git.kernel.org/pub/scm/linux/kernel/git/egtvedt/linux-avr32 Pull AVR32 removal from Hans-Christian Noren Egtvedt: "This will remove support for AVR32 architecture from the kernel and clean away the most obvious architecture related parts. Removing dead code in drivers is the next step" Notes from previous discussion about this: "The AVR32 architecture is not keeping up with the development of the kernel, and since it shares so much of the drivers with Atmel ARM SoC, it is starting to hinder these drivers to develop swiftly. Also, all AVR32 AP7 SoC processors are end of lifed from Atmel (now Microchip). Finally, the GCC toolchain is stuck at version 4.2.x, and has not received any patches since the last release from Atmel; 4.2.4-atmel.1.1.3.avr32linux.1. When building kernel v4.10, this toolchain is no longer able to properly link the network stack. Haavard and I have came to the conclusion that we feel keeping AVR32 on life support offers more obstacles for Atmel ARMs, than it gives joy to AVR32 users. I also suspect there are very few AVR32 users left today, if anybody at all" That discussion was acked by Andy Shevchenko, Boris Brezillon, Nicolas Ferre, and Haavard Skinnemoen. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/egtvedt/linux-avr32: mm: remove AVR32 arch special handling in mm/Kconfig lib: remove check for AVR32 arch in test_user_copy lib: remove AVR32 entry in Kconfig.debug compile with frame pointers scripts: remove AVR32 support from checkstack.pl docs: remove all references to AVR32 architecture avr32: remove support for AVR32 architecture
2017-05-01Merge branch 'work.uaccess' of ↵Linus Torvalds3-4/+30
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull uaccess unification updates from Al Viro: "This is the uaccess unification pile. It's _not_ the end of uaccess work, but the next batch of that will go into the next cycle. This one mostly takes copy_from_user() and friends out of arch/* and gets the zero-padding behaviour in sync for all architectures. Dealing with the nocache/writethrough mess is for the next cycle; fortunately, that's x86-only. Same for cleanups in iov_iter.c (I am sold on access_ok() in there, BTW; just not in this pile), same for reducing __copy_... callsites, strn*... stuff, etc. - there will be a pile about as large as this one in the next merge window. This one sat in -next for weeks. -3KLoC" * 'work.uaccess' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (96 commits) HAVE_ARCH_HARDENED_USERCOPY is unconditional now CONFIG_ARCH_HAS_RAW_COPY_USER is unconditional now m32r: switch to RAW_COPY_USER hexagon: switch to RAW_COPY_USER microblaze: switch to RAW_COPY_USER get rid of padding, switch to RAW_COPY_USER ia64: get rid of copy_in_user() ia64: sanitize __access_ok() ia64: get rid of 'segment' argument of __do_{get,put}_user() ia64: get rid of 'segment' argument of __{get,put}_user_check() ia64: add extable.h powerpc: get rid of zeroing, switch to RAW_COPY_USER esas2r: don't open-code memdup_user() alpha: fix stack smashing in old_adjtimex(2) don't open-code kernel_setsockopt() mips: switch to RAW_COPY_USER mips: get rid of tail-zeroing in primitives mips: make copy_from_user() zero tail explicitly mips: clean and reorder the forest of macros... mips: consolidate __invoke_... wrappers ...
2017-05-01Merge branch 'md-next' into md-linusShaohua Li1-0/+17
2017-05-01rhashtable: compact struct rhashtable_paramsFlorian Westphal1-1/+1
By using smaller datatypes this (rather large) struct shrinks considerably (80 -> 48 bytes on x86_64). As this is embedded in other structs, this also rerduces size of several others, e.g. cls_fl_head or nft_hash. Signed-off-by: Florian Westphal <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-05-01Merge branch 'for-4.12/block' of git://git.kernel.dk/linux-blockLinus Torvalds2-8/+72
Pull block layer updates from Jens Axboe: - Add BFQ IO scheduler under the new blk-mq scheduling framework. BFQ was initially a fork of CFQ, but subsequently changed to implement fairness based on B-WF2Q+, a modified variant of WF2Q. BFQ is meant to be used on desktop type single drives, providing good fairness. From Paolo. - Add Kyber IO scheduler. This is a full multiqueue aware scheduler, using a scalable token based algorithm that throttles IO based on live completion IO stats, similary to blk-wbt. From Omar. - A series from Jan, moving users to separately allocated backing devices. This continues the work of separating backing device life times, solving various problems with hot removal. - A series of updates for lightnvm, mostly from Javier. Includes a 'pblk' target that exposes an open channel SSD as a physical block device. - A series of fixes and improvements for nbd from Josef. - A series from Omar, removing queue sharing between devices on mostly legacy drivers. This helps us clean up other bits, if we know that a queue only has a single device backing. This has been overdue for more than a decade. - Fixes for the blk-stats, and improvements to unify the stats and user windows. This both improves blk-wbt, and enables other users to register a need to receive IO stats for a device. From Omar. - blk-throttle improvements from Shaohua. This provides a scalable framework for implementing scalable priotization - particularly for blk-mq, but applicable to any type of block device. The interface is marked experimental for now. - Bucketized IO stats for IO polling from Stephen Bates. This improves efficiency of polled workloads in the presence of mixed block size IO. - A few fixes for opal, from Scott. - A few pulls for NVMe, including a lot of fixes for NVMe-over-fabrics. From a variety of folks, mostly Sagi and James Smart. - A series from Bart, improving our exposed info and capabilities from the blk-mq debugfs support. - A series from Christoph, cleaning up how handle WRITE_ZEROES. - A series from Christoph, cleaning up the block layer handling of how we track errors in a request. On top of being a nice cleanup, it also shrinks the size of struct request a bit. - Removal of mg_disk and hd (sorry Linus) by Christoph. The former was never used by platforms, and the latter has outlived it's usefulness. - Various little bug fixes and cleanups from a wide variety of folks. * 'for-4.12/block' of git://git.kernel.dk/linux-block: (329 commits) block: hide badblocks attribute by default blk-mq: unify hctx delay_work and run_work block: add kblock_mod_delayed_work_on() blk-mq: unify hctx delayed_run_work and run_work nbd: fix use after free on module unload MAINTAINERS: bfq: Add Paolo as maintainer for the BFQ I/O scheduler blk-mq-sched: alloate reserved tags out of normal pool mtip32xx: use runtime tag to initialize command header scsi: Implement blk_mq_ops.show_rq() blk-mq: Add blk_mq_ops.show_rq() blk-mq: Show operation, cmd_flags and rq_flags names blk-mq: Make blk_flags_show() callers append a newline character blk-mq: Move the "state" debugfs attribute one level down blk-mq: Unregister debugfs attributes earlier blk-mq: Only unregister hctxs for which registration succeeded blk-mq-debugfs: Rename functions for registering and unregistering the mq directory blk-mq: Let blk_mq_debugfs_register() look up the queue name blk-mq: Register <dev>/queue/mq after having registered <dev>/queue ide-pm: always pass 0 error to ide_complete_rq in ide_do_devset ide-pm: always pass 0 error to __blk_end_request_all ..
2017-05-01lib: remove check for AVR32 arch in test_user_copyHans-Christian Noren Egtvedt1-1/+0
The AVR32 architecture support has been removed from the Linux kernel, hence remove all the check for this architecture in test_user_copy.c. Signed-off-by: Hans-Christian Noren Egtvedt <[email protected]>
2017-05-01lib: remove AVR32 entry in Kconfig.debug compile with frame pointersHans-Christian Noren Egtvedt1-1/+1
AVR32 architecture has been removed from the Linux kernel sources, hence clean up the architecture related symbols in lib/Kconfig.debug. Signed-off-by: Hans-Christian Noren Egtvedt <[email protected]>
2017-04-29Merge branch 'for-linus' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull iov iter fix from Al Viro. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: fix a braino in ITER_PIPE iov_iter_revert()
2017-04-29fix a braino in ITER_PIPE iov_iter_revert()Al Viro1-1/+1
Fixes: 27c0e3748e41 Tested-by: Dave Jones <[email protected]> Signed-off-by: Al Viro <[email protected]>
2017-04-28rhashtable: Do not lower max_elems when max_size is zeroHerbert Xu1-5/+6
The commit 6d684e54690c ("rhashtable: Cap total number of entries to 2^31") breaks rhashtable users that do not set max_size. This is because when max_size is zero max_elems is also incorrectly set to zero instead of 2^31. This patch fixes it by only lowering max_elems when max_size is not zero. Fixes: 6d684e54690c ("rhashtable: Cap total number of entries to 2^31") Reported-by: Florian Fainelli <[email protected]> Reported-by: kernel test robot <[email protected]> Signed-off-by: Herbert Xu <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-04-27rhashtable: Cap total number of entries to 2^31Herbert Xu1-0/+5
When max_size is not set or if it set to a sufficiently large value, the nelems counter can overflow. This would cause havoc with the automatic shrinking as it would then attempt to fit a huge number of entries into a tiny hash table. This patch fixes this by adding max_elems to struct rhashtable to cap the number of elements. This is set to 2^31 as nelems is not a precise count. This is sufficiently smaller than UINT_MAX that it should be safe. When max_size is set max_elems will be lowered to at most twice max_size as is the status quo. Signed-off-by: Herbert Xu <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-04-26rhashtable: remove insecure_max_entries paramFlorian Westphal1-6/+0
no users in the tree, insecure_max_entries is always set to ht->p.max_size * 2 in rhtashtable_init(). Replace only spot that uses it with a ht->p.max_size check. Signed-off-by: Florian Westphal <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-04-26CONFIG_ARCH_HAS_RAW_COPY_USER is unconditional nowAl Viro1-3/+1
all architectures converted Signed-off-by: Al Viro <[email protected]>
2017-04-26Merge branches 'uaccess.alpha', 'uaccess.arc', 'uaccess.arm', ↵Al Viro6-15/+76
'uaccess.arm64', 'uaccess.avr32', 'uaccess.bfin', 'uaccess.c6x', 'uaccess.cris', 'uaccess.frv', 'uaccess.h8300', 'uaccess.hexagon', 'uaccess.ia64', 'uaccess.m32r', 'uaccess.m68k', 'uaccess.metag', 'uaccess.microblaze', 'uaccess.mips', 'uaccess.mn10300', 'uaccess.nios2', 'uaccess.openrisc', 'uaccess.parisc', 'uaccess.powerpc', 'uaccess.s390', 'uaccess.score', 'uaccess.sh', 'uaccess.sparc', 'uaccess.tile', 'uaccess.um', 'uaccess.unicore32', 'uaccess.x86' and 'uaccess.xtensa' into work.uaccess
2017-04-24devres: fix devm_ioremap_*() offset parameter kerneldoc descriptionLorenzo Pieralisi1-3/+3
The offset parameter in the devres devm_ioremap_*() functions kerneldoc entries is erroneously defined as BUS offset whereas it is actually a resource address. Since it is actually misleading, fix the devres devm_ioremap_* offset parameter kerneldoc entry by replacing BUS offset with a more suitable description (ie Resource address). Signed-off-by: Lorenzo Pieralisi <[email protected]> Signed-off-by: Bjorn Helgaas <[email protected]> Cc: Tejun Heo <[email protected]>
2017-04-24dma-debug: use offset_in_page() macroGeliang Tang1-2/+2
Use offset_in_page() macro instead of open-coding. Signed-off-by: Geliang Tang <[email protected]> Signed-off-by: Vinod Koul <[email protected]>
2017-04-20Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller1-3/+3
A function in kernel/bpf/syscall.c which got a bug fix in 'net' was moved to kernel/bpf/verifier.c in 'net-next'. Signed-off-by: David S. Miller <[email protected]>
2017-04-18sparc64: Use LOCKDEP_SMALL, not PROVE_LOCKING_SMALLDaniel Jordan1-3/+3
CONFIG_PROVE_LOCKING_SMALL shrinks the memory usage of lockdep so the kernel text, data, and bss fit in the required 32MB limit, but this option is not set for every config that enables lockdep. A 4.10 kernel fails to boot with the console output Kernel: Using 8 locked TLB entries for main kernel image. hypervisor_tlb_lock[2000000:0:8000000071c007c3:1]: errors with f Program terminated with these config options CONFIG_LOCKDEP=y CONFIG_LOCK_STAT=y CONFIG_PROVE_LOCKING=n To fix, rename CONFIG_PROVE_LOCKING_SMALL to CONFIG_LOCKDEP_SMALL, and enable this option with CONFIG_LOCKDEP=y so we get the reduced memory usage every time lockdep is turned on. Tested that CONFIG_LOCKDEP_SMALL is set to 'y' if and only if CONFIG_LOCKDEP is set to 'y'. When other lockdep-related config options that select CONFIG_LOCKDEP are enabled (e.g. CONFIG_LOCK_STAT or CONFIG_PROVE_LOCKING), verified that CONFIG_LOCKDEP_SMALL is also enabled. Fixes: e6b5f1be7afe ("config: Adding the new config parameter CONFIG_PROVE_LOCKING_SMALL for sparc") Signed-off-by: Daniel Jordan <[email protected]> Reviewed-by: Babu Moger <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-04-18rhashtable: remove insecure_elasticityFlorian Westphal1-16/+1
commit 83e7e4ce9e93c3 ("mac80211: Use rhltable instead of rhashtable") removed the last user that made use of 'insecure_elasticity' parameter, i.e. the default of 16 is used everywhere. Replace it with a constant. Signed-off-by: Florian Westphal <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-04-18boot/param: Move next_arg() function to lib/cmdline.c for later reuseBaoquan He1-0/+57
next_arg() will be used to parse boot parameters in the x86/boot/compressed code, so move it to lib/cmdline.c for better code reuse. No change in functionality. Signed-off-by: Baoquan He <[email protected]> Cc: Andrew Morton <[email protected]> Cc: Gustavo Padovan <[email protected]> Cc: Jens Axboe <[email protected]> Cc: Jessica Yu <[email protected]> Cc: Johannes Berg <[email protected]> Cc: Josh Triplett <[email protected]> Cc: Larry Finger <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Niklas Söderlund <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Petr Mladek <[email protected]> Cc: Rasmus Villemoes <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: zijun_hu <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]>
2017-04-15Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller1-0/+63
Conflicts were simply overlapping changes. In the net/ipv4/route.c case the code had simply moved around a little bit and the same fix was made in both 'net' and 'net-next'. In the net/sched/sch_generic.c case a fix in 'net' happened at the same time that a new argument was added to qdisc_hash_add(). Signed-off-by: David S. Miller <[email protected]>
2017-04-14sbitmap: add sbitmap_get_shallow() operationOmar Sandoval1-7/+68
This operation supports the use case of limiting the number of bits that can be allocated for a given operation. Rather than setting aside some bits at the end of the bitmap, we can set aside bits in each word of the bitmap. This means we can keep the allocation hints spread out and support sbitmap_resize() nicely at the cost of lower granularity for the allowed depth. Signed-off-by: Omar Sandoval <[email protected]> Signed-off-by: Jens Axboe <[email protected]>
2017-04-14Merge branch 'linus' into locking/core, to pick up fixesIngo Molnar2-0/+11
Signed-off-by: Ingo Molnar <[email protected]>
2017-04-13netlink: pass extended ACK struct to parsing functionsJohannes Berg1-10/+18
Pass the new extended ACK reporting struct to all of the generic netlink parsing functions. For now, pass NULL in almost all callers (except for some in the core.) Signed-off-by: Johannes Berg <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-04-06Merge commit 'b4fb8f66f1ae2e167d06c12d018025a8d4d3ba7e' into uaccess.ia64Al Viro2-9/+9
backmerge of mainline ia64 fix
2017-04-06Merge branch 'for-davem' of ↵David S. Miller1-0/+63
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-04-06Merge commit 'fc69910f329d' into uaccess.mipsAl Viro2-9/+9
backmerge of a build fix from mainline
2017-04-03Merge 4.11-rc5 into usb-nextGreg Kroah-Hartman2-0/+11
We want the usb fixes in here as well. Signed-off-by: Greg Kroah-Hartman <[email protected]>
2017-04-02kernel-api.rst: fix a series of errors when parsing C files[email protected]1-1/+1
./lib/string.c:134: WARNING: Inline emphasis start-string without end-string. ./mm/filemap.c:522: WARNING: Inline interpreted text or phrase reference start-string without end-string. ./mm/filemap.c:1283: ERROR: Unexpected indentation. ./mm/filemap.c:3003: WARNING: Inline interpreted text or phrase reference start-string without end-string. ./mm/vmalloc.c:1544: WARNING: Inline emphasis start-string without end-string. ./mm/page_alloc.c:4245: ERROR: Unexpected indentation. ./ipc/util.c:676: ERROR: Unexpected indentation. ./drivers/pci/irq.c:35: WARNING: Block quote ends without a blank line; unexpected unindent. ./security/security.c:109: ERROR: Unexpected indentation. ./security/security.c:110: WARNING: Definition list ends without a blank line; unexpected unindent. ./block/genhd.c:275: WARNING: Inline strong start-string without end-string. ./block/genhd.c:283: WARNING: Inline strong start-string without end-string. ./include/linux/clk.h:134: WARNING: Inline emphasis start-string without end-string. ./include/linux/clk.h:134: WARNING: Inline emphasis start-string without end-string. ./ipc/util.c:477: ERROR: Unknown target name: "s". Signed-off-by: Mauro Carvalho Chehab <[email protected]> Acked-by: Bjorn Helgaas <[email protected]> Signed-off-by: Jonathan Corbet <[email protected]>
2017-04-02kernel-api.rst: fix some complex tags at lib/bitmap.c[email protected]1-11/+17
Fix the following issues: ./lib/bitmap.c:869: WARNING: Definition list ends without a blank line; unexpected unindent. ./lib/bitmap.c:876: WARNING: Inline emphasis start-string without end-string. ./lib/bitmap.c:508: ERROR: Unexpected indentation. And make sure that a table and a footnote will use the right tags. Signed-off-by: Mauro Carvalho Chehab <[email protected]> Signed-off-by: Jonathan Corbet <[email protected]>
2017-04-02kernel-api.rst: fix output of the vsnprintf() documentation[email protected]1-3/+3
The vsnprintf() kernel-doc comment uses % character with a special meaning other than escaping a constant. As ReST already defines ``literal`` as an escape sequence, let's make kernel-doc handle it, and use it at lib/vsprintf.c. Signed-off-by: Mauro Carvalho Chehab <[email protected]> Signed-off-by: Jonathan Corbet <[email protected]>
2017-04-02Merge branch 'core-urgent-for-linus' of ↵Linus Torvalds1-0/+1
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull core fix from Thomas Gleixner: "Prevent leaking kernel memory via /proc/$pid/syscall when the queried task is not in a syscall" * 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: lib/syscall: Clear return values when no stack
2017-04-02[iov_iter] new privimitive: iov_iter_revert()Al Viro1-0/+63
opposite to iov_iter_advance(); the caller is responsible for never using it to move back past the initial position. Cc: [email protected] Signed-off-by: Al Viro <[email protected]>
2017-04-02Merge branch 'parisc-4.11-3' of ↵Al Viro3-12/+45
git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux into uaccess.parisc
2017-03-31kasan: report only the first error by defaultMark Rutland1-0/+10
Disable kasan after the first report. There are several reasons for this: - Single bug quite often has multiple invalid memory accesses causing storm in the dmesg. - Write OOB access might corrupt metadata so the next report will print bogus alloc/free stacktraces. - Reports after the first easily could be not bugs by itself but just side effects of the first one. Given that multiple reports usually only do harm, it makes sense to disable kasan after the first one. If user wants to see all the reports, the boot-time parameter kasan_multi_shot must be used. [[email protected]: wrote changelog and doc, added missing include] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Mark Rutland <[email protected]> Signed-off-by: Andrey Ryabinin <[email protected]> Cc: Andrey Konovalov <[email protected]> Cc: Alexander Potapenko <[email protected]> Cc: Dmitry Vyukov <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2017-03-30debug: Add _ONCE() logic to report_bug()Peter Zijlstra1-8/+20
Josh suggested moving the _ONCE logic inside the trap handler, using a bit in the bug_entry::flags field, avoiding the need for the extra variable. Sadly this only works for WARN_ON_ONCE(), since the others have printk() statements prior to triggering the trap. Still, this saves a fair amount of text and some data: text data filename 10682460 4530992 defconfig-build/vmlinux.orig 10665111 4530096 defconfig-build/vmlinux.patched Suggested-by: Josh Poimboeuf <[email protected]> Signed-off-by: Peter Zijlstra (Intel) <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Brian Gerst <[email protected]> Cc: Denys Vlasenko <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Signed-off-by: Ingo Molnar <[email protected]>
2017-03-28kill __copy_from_user_nocache()Al Viro1-2/+2
Signed-off-by: Al Viro <[email protected]>
2017-03-28generic ...copy_..._user primitivesAl Viro2-0/+28
provide raw_copy_..._user() and select ARCH_HAS_RAW_COPY_USER to use those. Signed-off-by: Al Viro <[email protected]>
2017-03-28new helper: uaccess_kernel()Al Viro1-1/+1
Signed-off-by: Al Viro <[email protected]>
2017-03-24md5: remove from lib and only live in cryptoJason A. Donenfeld2-96/+1
The md5_transform function is no longer used any where in the tree, except for the crypto api's actual implementation of md5, so we can drop the function from lib and put it as a static function of the crypto file, where it belongs. There should be no new users of md5_transform, anyway, since there are more modern ways of doing what it once achieved. Signed-off-by: Jason A. Donenfeld <[email protected]> Reviewed-by: Eric Biggers <[email protected]> Signed-off-by: Herbert Xu <[email protected]>
2017-03-24lib/syscall: Clear return values when no stackKees Cook1-0/+1
Commit: aa1f1a639621 ("lib/syscall: Pin the task stack in collect_syscall()") ... added logic to handle a process stack not existing, but left sp and pc uninitialized, which can be later reported via /proc/$pid/syscall for zombie processes, potentially exposing kernel memory to userspace. Zombie /proc/$pid/syscall before: -1 0xffffffff9a060100 0xffff92f42d6ad900 Zombie /proc/$pid/syscall after: -1 0x0 0x0 Reported-by: Robert Święcki <[email protected]> Signed-off-by: Kees Cook <[email protected]> Reviewed-by: Andy Lutomirski <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Brian Gerst <[email protected]> Cc: Denys Vlasenko <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Josh Poimboeuf <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: [email protected] # v4.9+ Fixes: aa1f1a639621 ("lib/syscall: Pin the task stack in collect_syscall()") Link: http://lkml.kernel.org/r/20170323224616.GA92694@beast Signed-off-by: Ingo Molnar <[email protected]>
2017-03-23lib/string: add sysfs_match_string helperHeikki Krogerus1-0/+26
Make a simple helper for matching strings with sysfs attribute files. In most parts the same as match_string(), except sysfs_match_string() uses sysfs_streq() instead of strcmp() for matching. This is more convenient when used with sysfs attributes. Signed-off-by: Heikki Krogerus <[email protected]> Reviewed-by: Mika Westerberg <[email protected]> Reviewed-by: Felipe Balbi <[email protected]> Tested-by: Guenter Roeck <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2017-03-23locking/refcounts: Use atomic_try_cmpxchg()Peter Zijlstra1-32/+15
Generates better code (GCC-6.2.1): text filename 1576 defconfig-build/lib/refcount.o.pre 1488 defconfig-build/lib/refcount.o.post Signed-off-by: Peter Zijlstra (Intel) <[email protected]> Cc: Andrew Morton <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Brian Gerst <[email protected]> Cc: Denys Vlasenko <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Josh Poimboeuf <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Paul E. McKenney <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: [email protected] Signed-off-by: Ingo Molnar <[email protected]>
2017-03-22percpu-refcount: support synchronous switch to atomic mode.NeilBrown1-0/+17
percpu_ref_switch_to_atomic_sync() schedules the switch to atomic mode, then waits for it to complete. Also export percpu_ref_switch_to_* so they can be used from modules. This will be used in md/raid to count the number of pending write requests to an array. We occasionally need to check if the count is zero, but most often we don't care. We always want updates to the counter to be fast, as in some cases we count every 4K page. Signed-off-by: NeilBrown <[email protected]> Acked-by: Tejun Heo <[email protected]> Signed-off-by: Shaohua Li <[email protected]>
2017-03-22kobject: Export kobject_get_unless_zero()Jan Kara1-1/+4
Make the function available for outside use and fortify it against NULL kobject. CC: Greg Kroah-Hartman <[email protected]> Reviewed-by: Bart Van Assche <[email protected]> Acked-by: Tejun Heo <[email protected]> Signed-off-by: Jan Kara <[email protected]> Signed-off-by: Jens Axboe <[email protected]>
2017-03-17lib/Kconfig.debug: correct documentation pathsHans Holmberg1-4/+5
A bunch of documentation files have moved, correct the paths. Signed-off-by: Hans Holmberg <[email protected]> Signed-off-by: Jonathan Corbet <[email protected]>
2017-03-13locking/refcount: Add refcount_t API kernel-doc commentsDavid Windsor1-12/+110
Signed-off-by: David Windsor <[email protected]> Acked-by: Peter Zijlstra <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Paul E. McKenney <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: [email protected] Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]>
2017-03-09mm: convert generic code to 5-level pagingKirill A. Shutemov1-3/+36
Convert all non-architecture-specific code to 5-level paging. It's mostly mechanical adding handling one more page table level in places where we deal with pud_t. Signed-off-by: Kirill A. Shutemov <[email protected]> Acked-by: Michal Hocko <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2017-03-07Merge branch 'locking-urgent-for-linus' of ↵Linus Torvalds1-7/+7
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull locking fixes from Ingo Molnar: - Change the new refcount_t warnings from WARN() to WARN_ONCE() - two ww_mutex fixes - plus a new lockdep self-consistency check for a bug that triggered in practice * 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: locking/ww_mutex: Adjust the lock number for stress test locking/lockdep: Add nest_lock integrity test locking/ww_mutex: Replace cpu_relax() with cond_resched() for tests locking/refcounts: Change WARN() to WARN_ONCE()
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