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* Merge branch 'salted-string-hash'Linus Torvalds2016-07-2839-95/+107
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This changes the vfs dentry hashing to mix in the parent pointer at the _beginning_ of the hash, rather than at the end. That actually improves both the hash and the code generation, because we can move more of the computation to the "static" part of the dcache setup, and do less at lookup runtime. It turns out that a lot of other hash users also really wanted to mix in a base pointer as a 'salt' for the hash, and so the slightly extended interface ends up working well for other cases too. Users that want a string hash that is purely about the string pass in a 'salt' pointer of NULL. * merge branch 'salted-string-hash': fs/dcache.c: Save one 32-bit multiply in dcache lookup vfs: make the string hashes salt the hash
| * fs/dcache.c: Save one 32-bit multiply in dcache lookupGeorge Spelvin2016-06-112-3/+5
| | | | | | | | | | | | | | | | | | | | | | | | Noe that we're mixing in the parent pointer earlier, we don't need to use hash_32() to mix its bits. Instead, we can just take the msbits of the hash value directly. For those applications which use the partial_name_hash(), move the multiply to end_name_hash. Signed-off-by: George Spelvin <linux@sciencehorizons.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * vfs: make the string hashes salt the hashLinus Torvalds2016-06-1038-89/+99
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We always mixed in the parent pointer into the dentry name hash, but we did it late at lookup time. It turns out that we can simplify that lookup-time action by salting the hash with the parent pointer early instead of late. A few other users of our string hashes also wanted to mix in their own pointers into the hash, and those are updated to use the same mechanism. Hash users that don't have any particular initial salt can just use the NULL pointer as a no-salt. Cc: Vegard Nossum <vegard.nossum@oracle.com> Cc: George Spelvin <linux@sciencehorizons.net> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Add braces to avoid "ambiguous ‘else’" compiler warningsLinus Torvalds2016-07-273-3/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some of our "for_each_xyz()" macro constructs make gcc unhappy about lack of braces around if-statements inside or outside the loop, because the loop construct itself has a "if-then-else" statement inside of it. The resulting warnings look something like this: drivers/gpu/drm/i915/i915_debugfs.c: In function ‘i915_dump_lrc’: drivers/gpu/drm/i915/i915_debugfs.c:2103:6: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (ctx != dev_priv->kernel_context) ^ even if the code itself is fine. Since the warning is fairly easy to avoid by adding a braces around the if-statement near the for_each_xyz() construct, do so, rather than disabling the otherwise potentially useful warning. (The if-then-else statements used in the "for_each_xyz()" constructs are designed to be inherently safe even with no braces, but in this case it's quite understandable that gcc isn't really able to tell that). This finally leaves the standard "allmodconfig" build with just a handful of remaining warnings, so new and valid warnings hopefully will stand out. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Disable "frame-address" warningLinus Torvalds2016-07-271-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Newer versions of gcc warn about the use of __builtin_return_address() with a non-zero argument when "-Wall" is specified: kernel/trace/trace_irqsoff.c: In function ‘stop_critical_timings’: kernel/trace/trace_irqsoff.c:433:86: warning: calling ‘__builtin_return_address’ with a nonzero argument is unsafe [-Wframe-address] stop_critical_timing(CALLER_ADDR0, CALLER_ADDR1); [ .. repeats a few times for other similar cases .. ] It is true that a non-zero argument is somewhat dangerous, and we do not actually have very many uses of that in the kernel - but the ftrace code does use it, and as Stephen Rostedt says: "We are well aware of the danger of using __builtin_return_address() of > 0. In fact that's part of the reason for having the "thunk" code in x86 (See arch/x86/entry/thunk_{64,32}.S). [..] it adds extra frames when tracking irqs off sections, to prevent __builtin_return_address() from accessing bad areas. In fact the thunk_32.S states: 'Trampoline to trace irqs off. (otherwise CALLER_ADDR1 might crash)'." For now, __builtin_return_address() with a non-zero argument is the best we can do, and the warning is not helpful and can end up making people miss other warnings for real problems. So disable the frame-address warning on compilers that need it. Acked-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Merge tag 'hsi-for-4.8' of ↵Linus Torvalds2016-07-2710-190/+239
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-hsi Pull HSI updates from Sebastian Reichel: - proper runtime pm support for omap-ssi and ssi-protocol - misc fixes * tag 'hsi-for-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-hsi: (24 commits) HSI: omap_ssi: drop pm_runtime_irq_safe HSI: omap_ssi_port: use rpm autosuspend API HSI: omap_ssi: call msg->complete() from process context HSI: omap_ssi_port: ensure clocks are kept enabled during transfer HSI: omap_ssi_port: replace pm_runtime_put_sync with non-sync variant HSI: omap_ssi_port: avoid calling runtime_pm_*_sync inside spinlock HSI: omap_ssi_port: avoid pm_runtime_get_sync in ssi_start_dma and ssi_start_pio HSI: omap_ssi_port: switch to threaded pio irq HSI: omap_ssi_core: remove pm_runtime_get_sync call from tasklet HSI: omap_ssi_core: use pm_runtime_put instead of pm_runtime_put_sync HSI: omap_ssi_port: prepare start_tx/stop_tx for blocking pm_runtime calls HSI: core: switch port event notifier from atomic to blocking HSI: omap_ssi_port: replace wkin_cken with atomic bitmap operations HSI: omap_ssi: convert cawake irq handler to thread HSI: ssi_protocol: fix ssip_xmit invocation HSI: ssi_protocol: replace spin_lock with spin_lock_bh HSI: ssi_protocol: avoid ssi_waketest call with held spinlock HSI: omap_ssi: do not reset module HSI: omap_ssi_port: remove useless newline hsi: Only descend into hsi directory when CONFIG_HSI is set ...
| * | HSI: omap_ssi: drop pm_runtime_irq_safeSebastian Reichel2016-06-282-3/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | pm_runtime_irq_safe increases the parents runtime usage counter effectively keeping the OMAP SoC from idling. Signed-off-by: Sebastian Reichel <sre@kernel.org> Acked-by: Tony Lindgren <tony@atomide.com> Tested-by: Pavel Machek <pavel@ucw.cz>
| * | HSI: omap_ssi_port: use rpm autosuspend APISebastian Reichel2016-06-281-24/+44
| | | | | | | | | | | | | | | | | | | | | | | | | | | Instead of immediately sending the SSI module to sleep, wait some time in case of new incoming or outgoing traffic. Signed-off-by: Sebastian Reichel <sre@kernel.org> Tested-by: Pavel Machek <pavel@ucw.cz>
| * | HSI: omap_ssi: call msg->complete() from process contextSebastian Reichel2016-06-283-1/+25
| | | | | | | | | | | | | | | | | | | | | | | | msg->complete() should always be called from process context once irq_safe runtime pm flag is no longer set for omap-ssi. Signed-off-by: Sebastian Reichel <sre@kernel.org> Tested-by: Pavel Machek <pavel@ucw.cz>
| * | HSI: omap_ssi_port: ensure clocks are kept enabled during transferSebastian Reichel2016-06-281-0/+2
| | | | | | | | | | | | | | | | | | | | | ensure, that clocks remain enabled, when a transfer is started. Signed-off-by: Sebastian Reichel <sre@kernel.org> Tested-by: Pavel Machek <pavel@ucw.cz>
| * | HSI: omap_ssi_port: replace pm_runtime_put_sync with non-sync variantSebastian Reichel2016-06-281-9/+9
| | | | | | | | | | | | | | | | | | | | | | | | There is no need to wait for hardware to really reach idle states, so just release runtime PM asynchronously. Signed-off-by: Sebastian Reichel <sre@kernel.org> Tested-by: Pavel Machek <pavel@ucw.cz>
| * | HSI: omap_ssi_port: avoid calling runtime_pm_*_sync inside spinlockSebastian Reichel2016-06-281-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | runtime_pm_*_sync can block when irq_safe flag is removed from omap-ssi driver, so it may not be called while a spinlock is held. Signed-off-by: Sebastian Reichel <sre@kernel.org> Tested-by: Pavel Machek <pavel@ucw.cz>
| * | HSI: omap_ssi_port: avoid pm_runtime_get_sync in ssi_start_dma and ssi_start_pioSebastian Reichel2016-06-281-6/+24
| | | | | | | | | | | | | | | | | | | | | | | | These functions may be called from atomic context, so avoid synchronous runtime pm calls. Signed-off-by: Sebastian Reichel <sre@kernel.org> Tested-by: Pavel Machek <pavel@ucw.cz>
| * | HSI: omap_ssi_port: switch to threaded pio irqSebastian Reichel2016-06-282-38/+24
| | | | | | | | | | | | | | | | | | | | | | | | | | | Move pio interrupt handler from tasklet into thread to allow runtime_pm_get_sync calls without irq_safe being set. Signed-off-by: Sebastian Reichel <sre@kernel.org> Tested-by: Pavel Machek <pavel@ucw.cz>
| * | HSI: omap_ssi_core: remove pm_runtime_get_sync call from taskletSebastian Reichel2016-06-281-1/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We may not call pm_runtime_get_sync() from tasklet, since it can block once pm_runtime_irq_safe is removed for omap-ssi. Since irq can should only be created for a running device, we assume, that the device is already running and use non- synchronous API instead. Signed-off-by: Sebastian Reichel <sre@kernel.org> Tested-by: Pavel Machek <pavel@ucw.cz>
| * | HSI: omap_ssi_core: use pm_runtime_put instead of pm_runtime_put_syncSebastian Reichel2016-06-281-5/+5
| | | | | | | | | | | | | | | | | | | | | | | | There is no need to disable the device synchronously, so don't do it. Signed-off-by: Sebastian Reichel <sre@kernel.org> Tested-by: Pavel Machek <pavel@ucw.cz>
| * | HSI: omap_ssi_port: prepare start_tx/stop_tx for blocking pm_runtime callsSebastian Reichel2016-06-282-5/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ssi_start_tx and ssi_stop_tx may be called from atomic context. Once pm_runtime_irq_safe() is removed for omap-ssi, this will fail, due to blocking pm_runtime_*_sync() calls. This fixes ssi_stop_tx by using non-sync API and ssi_start_tx by using a worker thread. Signed-off-by: Sebastian Reichel <sre@kernel.org> Tested-by: Pavel Machek <pavel@ucw.cz>
| * | HSI: core: switch port event notifier from atomic to blockingSebastian Reichel2016-06-282-5/+5
| | | | | | | | | | | | | | | | | | | | | | | | port events should be sent from process context after irq_safe runtime pm flag is removed in omap-ssi. Signed-off-By: Sebastian Reichel <sre@kernel.org> Tested-by: Pavel Machek <pavel@ucw.cz>
| * | HSI: omap_ssi_port: replace wkin_cken with atomic bitmap operationsSebastian Reichel2016-06-282-15/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This simplifies the code and avoids holding a spin_lock when runtime pm calls are made. Once the irq_safe flag is removed for omap_ssi's runtime pm, pm_runtime_get/put_sync can sleep, which is a no-go while holding a spin_lock. Signed-off-by: Sebastian Reichel <sre@kernel.org> Tested-by: Pavel Machek <pavel@ucw.cz>
| * | HSI: omap_ssi: convert cawake irq handler to threadSebastian Reichel2016-06-283-19/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | Convert cawake interrupt handler from tasklet to threaded interrupt handler in preparation of blocking runtime_pm calls. Signed-off-by: Sebastian Reichel <sre@kernel.org> Tested-by: Pavel Machek <pavel@ucw.cz>
| * | HSI: ssi_protocol: fix ssip_xmit invocationSebastian Reichel2016-06-281-1/+12
| | | | | | | | | | | | | | | | | | | | | | | | ssip_xmit should be called from process context, since it calls hsi_async_write. Signed-off-by: Sebastian Reichel <sre@kernel.org> Tested-by: Pavel Machek <pavel@ucw.cz>
| * | HSI: ssi_protocol: replace spin_lock with spin_lock_bhSebastian Reichel2016-06-281-32/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | | To avoid setting irq_safe runtime pm flag in omap-ssi, multiple calls will be moved to process context. This also affects ssi-protocol, so use the safer spin_lock_bh instead of a simple spin_lock. Signed-off-by: Sebastian Reichel <sre@kernel.org> Tested-by: Pavel Machek <pavel@ucw.cz>
| * | HSI: ssi_protocol: avoid ssi_waketest call with held spinlockSebastian Reichel2016-06-281-16/+25
| | | | | | | | | | | | | | | | | | | | | | | | | | | This avoids calling ssi_waketest(), while a spinlock is being hold, since ssi_waketest may sleep once irq_safe runtime pm is disabled. Signed-off-by: Sebastian Reichel <sre@kernel.org> Tested-by: Pavel Machek <pavel@ucw.cz>
| * | HSI: omap_ssi: do not reset moduleSebastian Reichel2016-06-282-20/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | module reset and power management rule setup is already done by hwmod. Remove this cruft, which predates hwmod. Signed-off-by: Sebastian Reichel <sre@kernel.org> Acked-by: Tony Lindgren <tony@atomide.com> Tested-by: Pavel Machek <pavel@ucw.cz>
| * | HSI: omap_ssi_port: remove useless newlineSebastian Reichel2016-06-281-4/+2
| | | | | | | | | | | | | | | Signed-off-by: Sebastian Reichel <sre@kernel.org> Tested-by: Pavel Machek <pavel@ucw.cz>
| * | hsi: Only descend into hsi directory when CONFIG_HSI is setAndrew F. Davis2016-06-151-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | When CONFIG_HSI is not set make will still descend into the hsi directory but nothing will be built. This produces unneeded build artifacts and messages in addition to slowing the build. Fix this here. Signed-off-by: Andrew F. Davis <afd@ti.com> Signed-off-by: Sebastian Reichel <sre@kernel.org>
| * | hsi: Build hsi_boardinfo.c into hsi core if enabledAndrew F. Davis2016-06-153-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If the HSI core is built as a module hsi_boardinfo may still be built-in as its Kconfig type is bool, which can cause build issues. Fix this by building this code into the HSI core when enabled. Reported-by: kbuild test robot <lkp@intel.com> Signed-off-by: Andrew F. Davis <afd@ti.com> Signed-off-by: Sebastian Reichel <sre@kernel.org>
| * | HSI: cmt_speech: Fix double spin_lockIago Abal2016-06-101-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Release &hi->lock before calling `cs_hsi_control_read_error' to avoid deadlock. The bug was found using EBA (https://github.com/models-team/eba), which reported the following: Double lock first at drivers/hsi/clients/cmt_speech.c:443 second at drivers/hsi/clients/cmt_speech.c:447 In cs_hsi_read_on_control_complete defined at drivers/hsi/clients/cmt_speech.c:438: (!) drivers/hsi/clients/cmt_speech.c:443: spin_lock(& hi->lock); (?) drivers/hsi/clients/cmt_speech.c:445: msg->status == 4 -> true (!) drivers/hsi/clients/cmt_speech.c:447: cs_hsi_control_read_error(hi, msg); (!) drivers/hsi/clients/cmt_speech.c:407: __cs_hsi_error_pre(hi, msg, "control read", & hi->control_state); (!) drivers/hsi/clients/cmt_speech.c:382: spin_lock(& hi->lock); Signed-off-by: Iago Abal <mail@iagoabal.eu> Signed-off-by: Sebastian Reichel <sre@kernel.org>
| * | hsi: use kmemdupMuhammad Falak R Wani2016-05-291-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | Use kmemdup when some other buffer is immediately copied into allocated region. It replaces call to allocation followed by memcpy, by a single call to kmemdup. Signed-off-by: Muhammad Falak R Wani <falakreyaz@gmail.com> Signed-off-by: Sebastian Reichel <sre@kernel.org>
| * | HSI: cmt_speech: use vma_pages().Muhammad Falak R Wani2016-05-291-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | Replace explicit computation of vma page count by a call to vma_pages() Signed-off-by: Muhammad Falak R Wani <falakreyaz@gmail.com> Signed-off-by: Sebastian Reichel <sre@kernel.org>
* | | Merge tag 'random_for_linus' of ↵Linus Torvalds2016-07-276-160/+468
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random Pull random driver updates from Ted Ts'o: "A number of improvements for the /dev/random driver; the most important is the use of a ChaCha20-based CRNG for /dev/urandom, which is faster, more efficient, and easier to make scalable for silly/abusive userspace programs that want to read from /dev/urandom in a tight loop on NUMA systems. This set of patches also improves entropy gathering on VM's running on Microsoft Azure, and will take advantage of a hw random number generator (if present) to initialize the /dev/urandom pool" (It turns out that the random tree hadn't been in linux-next this time around, because it had been dropped earlier as being too quiet. Oh well). * tag 'random_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random: random: strengthen input validation for RNDADDTOENTCNT random: add backtracking protection to the CRNG random: make /dev/urandom scalable for silly userspace programs random: replace non-blocking pool with a Chacha20-based CRNG random: properly align get_random_int_hash random: add interrupt callback to VMBus IRQ handler random: print a warning for the first ten uninitialized random users random: initialize the non-blocking pool via add_hwgenerator_randomness()
| * | | random: strengthen input validation for RNDADDTOENTCNTTheodore Ts'o2016-07-031-6/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Don't allow RNDADDTOENTCNT or RNDADDENTROPY to accept a negative entropy value. It doesn't make any sense to subtract from the entropy counter, and it can trigger a warning: random: negative entropy/overflow: pool input count -40000 ------------[ cut here ]------------ WARNING: CPU: 3 PID: 6828 at drivers/char/random.c:670[< none >] credit_entropy_bits+0x21e/0xad0 drivers/char/random.c:670 Modules linked in: CPU: 3 PID: 6828 Comm: a.out Not tainted 4.7.0-rc4+ #4 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 ffffffff880b58e0 ffff88005dd9fcb0 ffffffff82cc838f ffffffff87158b40 fffffbfff1016b1c 0000000000000000 0000000000000000 ffffffff87158b40 ffffffff83283dae 0000000000000009 ffff88005dd9fcf8 ffffffff8136d27f Call Trace: [< inline >] __dump_stack lib/dump_stack.c:15 [<ffffffff82cc838f>] dump_stack+0x12e/0x18f lib/dump_stack.c:51 [<ffffffff8136d27f>] __warn+0x19f/0x1e0 kernel/panic.c:516 [<ffffffff8136d48c>] warn_slowpath_null+0x2c/0x40 kernel/panic.c:551 [<ffffffff83283dae>] credit_entropy_bits+0x21e/0xad0 drivers/char/random.c:670 [< inline >] credit_entropy_bits_safe drivers/char/random.c:734 [<ffffffff8328785d>] random_ioctl+0x21d/0x250 drivers/char/random.c:1546 [< inline >] vfs_ioctl fs/ioctl.c:43 [<ffffffff8185316c>] do_vfs_ioctl+0x18c/0xff0 fs/ioctl.c:674 [< inline >] SYSC_ioctl fs/ioctl.c:689 [<ffffffff8185405f>] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:680 [<ffffffff86a995c0>] entry_SYSCALL_64_fastpath+0x23/0xc1 arch/x86/entry/entry_64.S:207 ---[ end trace 5d4902b2ba842f1f ]--- This was triggered using the test program: // autogenerated by syzkaller (http://github.com/google/syzkaller) int main() { int fd = open("/dev/random", O_RDWR); int val = -5000; ioctl(fd, RNDADDTOENTCNT, &val); return 0; } It's harmless in that (a) only root can trigger it, and (b) after complaining the code never does let the entropy count go negative, but it's better to simply not allow this userspace from passing in a negative entropy value altogether. Google-Bug-Id: #29575089 Reported-By: Dmitry Vyukov <dvyukov@google.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
| * | | random: add backtracking protection to the CRNGTheodore Ts'o2016-07-031-5/+49
| | | | | | | | | | | | | | | | Signed-off-by: Theodore Ts'o <tytso@mit.edu>
| * | | random: make /dev/urandom scalable for silly userspace programsTheodore Ts'o2016-07-031-4/+58
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On a system with a 4 socket (NUMA) system where a large number of application threads were all trying to read from /dev/urandom, this can result in the system spending 80% of its time contending on the global urandom spinlock. The application should have used its own PRNG, but let's try to help it from running, lemming-like, straight over the locking cliff. Reported-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
| * | | random: replace non-blocking pool with a Chacha20-based CRNGTheodore Ts'o2016-07-035-164/+357
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The CRNG is faster, and we don't pretend to track entropy usage in the CRNG any more. Signed-off-by: Theodore Ts'o <tytso@mit.edu>
| * | | random: properly align get_random_int_hashEric Biggers2016-06-131-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | get_random_long() reads from the get_random_int_hash array using an unsigned long pointer. For this code to be guaranteed correct on all architectures, the array must be aligned to an unsigned long boundary. Cc: stable@kernel.org Signed-off-by: Eric Biggers <ebiggers3@gmail.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
| * | | random: add interrupt callback to VMBus IRQ handlerStephan Mueller2016-06-132-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The Hyper-V Linux Integration Services use the VMBus implementation for communication with the Hypervisor. VMBus registers its own interrupt handler that completely bypasses the common Linux interrupt handling. This implies that the interrupt entropy collector is not triggered. This patch adds the interrupt entropy collection callback into the VMBus interrupt handler function. Cc: stable@kernel.org Signed-off-by: Stephan Mueller <stephan.mueller@atsec.com> Signed-off-by: Stephan Mueller <smueller@chronox.de> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
| * | | random: print a warning for the first ten uninitialized random usersTheodore Ts'o2016-06-131-4/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since systemd is consistently using /dev/urandom before it is initialized, we can't see the other potentially dangerous users of /dev/urandom immediately after boot. So print the first ten such complaints instead. Cc: stable@kernel.org Signed-off-by: Theodore Ts'o <tytso@mit.edu>
| * | | random: initialize the non-blocking pool via add_hwgenerator_randomness()Theodore Ts'o2016-06-131-5/+11
| |/ / | | | | | | | | | | | | | | | | | | | | | | | | If we have a hardware RNG and are using the in-kernel rngd, we should use this to initialize the non-blocking pool so that getrandom(2) doesn't block unnecessarily. Cc: stable@kernel.org Signed-off-by: Theodore Ts'o <tytso@mit.edu>
* | | Merge tag 'media/v4.8-4' of ↵Linus Torvalds2016-07-27619-10988/+88276
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media Pull media documentation updates from Mauro Carvalho Chehab: "This patch series does the conversion of all media documentation stuff to Restrutured Text markup format and add them to the Documentation/index.rst file. The media documentation was grouped into 4 books: - media uAPI - media kAPI - V4L driver-specific documentation - DVB driver-specific documentation It also contains several documentation improvements and one fixup patch for a core issue with cropcap. PS. After this patch series, the media DocBook is deprecated and should be removed. I'll add such patch on a future pull request" * tag 'media/v4.8-4' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (322 commits) [media] cx23885-cardlist.rst: add a new card [media] doc-rst: add some needed escape codes [media] doc-rst: kapi: use :c:func: instead of :cpp:func doc-rst: kernel-doc: fix a change introduced by mistake [media] v4l2-ioctl.h add debug info for struct v4l2_ioctl_ops [media] dvb_ringbuffer.h: some documentation improvements [media] v4l2-ctrls.h: fully document the header file [media] doc-rst: Fix some typedef ugly warnings [media] doc-rst: reorganize the kAPI v4l2 chapters [media] rename v4l2-framework.rst to v4l2-intro.rst [media] move V4L2 clocks to a separate .rst file [media] v4l2-fh.rst: add cross references and markups [media] v4l2-fh.rst: add fh contents from v4l2-framework.rst [media] v4l2-fh.h: add documentation for it [media] v4l2-event.rst: add cross-references and markups [media] v4l2-event.h: document all functions [media] v4l2-event.rst: add text from v4l2-framework.rst [media] v4l2-framework.rst: remove videobuf quick chapter [media] v4l2-dev: add cross-references and improve markup [media] doc-rst: move v4l2-dev doc to a separate file ...
| * \ \ Merge branch 'topic/docs-next' into v4l_for_linusMauro Carvalho Chehab2016-07-27619-10988/+88276
| |\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * topic/docs-next: (322 commits) [media] cx23885-cardlist.rst: add a new card [media] doc-rst: add some needed escape codes [media] doc-rst: kapi: use :c:func: instead of :cpp:func doc-rst: kernel-doc: fix a change introduced by mistake [media] v4l2-ioctl.h add debug info for struct v4l2_ioctl_ops [media] dvb_ringbuffer.h: some documentation improvements [media] v4l2-ctrls.h: fully document the header file [media] doc-rst: Fix some typedef ugly warnings [media] doc-rst: reorganize the kAPI v4l2 chapters [media] rename v4l2-framework.rst to v4l2-intro.rst [media] move V4L2 clocks to a separate .rst file [media] v4l2-fh.rst: add cross references and markups [media] v4l2-fh.rst: add fh contents from v4l2-framework.rst [media] v4l2-fh.h: add documentation for it [media] v4l2-event.rst: add cross-references and markups [media] v4l2-event.h: document all functions [media] v4l2-event.rst: add text from v4l2-framework.rst [media] v4l2-framework.rst: remove videobuf quick chapter [media] v4l2-dev: add cross-references and improve markup [media] doc-rst: move v4l2-dev doc to a separate file ...
| | * | | [media] cx23885-cardlist.rst: add a new cardMauro Carvalho Chehab2016-07-231-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | add card Hauppauge WinTV-QuadHD-DVB to the list. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
| | * | | [media] doc-rst: add some needed escape codesMauro Carvalho Chehab2016-07-235-43/+43
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some extra escape codes are needed to avoid Sphinx to not identify the tags. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
| | * | | [media] doc-rst: kapi: use :c:func: instead of :cpp:funcMauro Carvalho Chehab2016-07-237-106/+106
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | References at the rst files for C functions generated via kernel-doc should use :c:func:. Fix it. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
| | * | | doc-rst: kernel-doc: fix a change introduced by mistakeMauro Carvalho Chehab2016-07-231-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | changeset b7e67f6c1bf7 ("doc-rst: linux_tv: supress lots of warnings") were meant to touch only on media files, but it also touched at this script by mistake. Revert such change. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
| | * | | [media] v4l2-ioctl.h add debug info for struct v4l2_ioctl_opsMauro Carvalho Chehab2016-07-232-0/+268
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This struct is mentioned at the kAPI docbook. So, let's document it. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
| | * | | [media] dvb_ringbuffer.h: some documentation improvementsMauro Carvalho Chehab2016-07-231-5/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Better document a note on this header. While here, better format dvb_ringbuffer_pkt_read_user() to adjust it to CodingStyle. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
| | * | | [media] v4l2-ctrls.h: fully document the header fileMauro Carvalho Chehab2016-07-231-86/+279
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There are lots of undocumented stuff on this header. Document them. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
| | * | | [media] doc-rst: Fix some typedef ugly warningsMauro Carvalho Chehab2016-07-232-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Sphinx can't handle well typedefs. Change two typedef occurrences, in order to cleanup some of such warnings. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
| | * | | [media] doc-rst: reorganize the kAPI v4l2 chaptersMauro Carvalho Chehab2016-07-2318-62/+51
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Reorganize the order of the document, putting the chapters on a more logical order and renaming some sections. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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