Linus Torvalds d7dfb07d4d firewire updates for v6.12 ... The batch of changes includes the followwing: - Replacing tasklet with usual workqueue for isochronous context - Replacing IDR with XArray - Utilizing guard macro where possible - Printing deprecation warning when enabling debug parameter of firewire-ohci module Additionally, it includes a single patch for sound subsystem which the subsystem maintainer acked: - Switching to nonatomic PCM operation In FireWire subsystem, tasklet has been used as the bottom half of 1394 OHCi hardIRQ so long. In the recent kernel updates, BH workqueue has been available, and some developers have proposed replacing tasklet with BH workqueue. While it is fortunate that developers are still considering the legacy subsystem, a simple replacement is not necessarily suitable. As a first step towards dropping tasklet, I've investigated the feasibility for 1394 OHCI isochronous context, and concluded that usual workqueue is available. In the context, the batch of packets is processed in the specific queue, thus the timing jitter caused by task scheduling is not so critical. Additionally, DMA transmission can be scheduled per-packet basis, therefore the context can be sleep between the operation of transmissions. Furthermore, in-kernel protocol implementation involves some CPU-bound tasks, which can sometimes consumes CPU time so long. These characteristics suggest that usual workqueue is suitable, through BH workqueues are not. The replacement with usual workqueue allows unit drivers to process the content of packets in non-atomic context. It brings some reliefs to some drivers in sound subsystem that spin-lock is not mandatory anymore during isochronous packet processing. -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQQE66IEYNDXNBPeGKSsLtaWM8LwEwUCZu41yQAKCRCsLtaWM8Lw E4Y1AP43vZatH202NNMnbkLSW9axmHe6VHWEwDSsJT80vTbBNAD/WYV62EoQzlk1 1lzdts11SSqYPhj6tJDuRgqULlNAows= =7VMx -----END PGP SIGNATURE----- Merge tag 'firewire-updates-6.12' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394 Pull firewire updates from Takashi Sakamoto: "In the FireWire subsystem, tasklets have been used as the bottom half of 1394 OHCi hardIRQ. In recent kernel updates, BH workqueues have become available, and some developers have proposed replacing the tasklet with a BH workqueue. As a first step towards dropping tasklet use, the 1394 OHCI isochronous context can use regular workqueues. In this context, the batch of packets is processed in the specific queue, thus the timing jitter caused by task scheduling is not so critical. Additionally, DMA transmission can be scheduled per-packet basis, therefore the context can be sleep between the operation of transmissions. Furthermore, in-kernel protocol implementation involves some CPU-bound tasks, which can sometimes consumes CPU time so long. These characteristics suggest that normal workqueues are suitable, through BH workqueues are not. The replacement with a workqueue allows unit drivers to process the content of packets in non-atomic context. It brings some reliefs to some drivers in sound subsystem that spin-lock is not mandatory anymore during isochronous packet processing. Summary: - Replace tasklet with workqueue for isochronous context - Replace IDR with XArray - Utilize guard macro where possible - Print deprecation warning when enabling debug parameter of firewire-ohci module - Switch to nonatomic PCM operation" * tag 'firewire-updates-6.12' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394: (55 commits) firewire: core: rename cause flag of tracepoints event firewire: core: update documentation of kernel APIs for flushing completions firewire: core: add helper function to retire descriptors Revert "firewire: core: move workqueue handler from 1394 OHCI driver to core function" Revert "firewire: core: use mutex to coordinate concurrent calls to flush completions" firewire: core: use mutex to coordinate concurrent calls to flush completions firewire: core: move workqueue handler from 1394 OHCI driver to core function firewire: core: fulfill documentation of fw_iso_context_flush_completions() firewire: core: expose kernel API to schedule work item to process isochronous context firewire: core: use WARN_ON_ONCE() to avoid superfluous dumps ALSA: firewire: use nonatomic PCM operation firewire: core: non-atomic memory allocation for isochronous event to user client firewire: ohci: operate IT/IR events in sleepable work process instead of tasklet softIRQ firewire: core: add local API to queue work item to workqueue specific to isochronous contexts firewire: core: allocate workqueue to handle isochronous contexts in card firewire: ohci: obsolete direct usage of printk_ratelimit() firewire: ohci: deprecate debug parameter firewire: core: update fw_device outside of device_find_child() firewire: ohci: fix error path to detect initiated reset in TI TSB41BA3D phy firewire: core/ohci: minor refactoring for computation of configuration ROM size ...		2024-09-23 12:55:27 -07:00
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events	firewire updates for v6.12	2024-09-23 12:55:27 -07:00
misc	NFS: trace: show TIMEDOUT instead of 0x6e	2024-09-01 10:04:55 -04:00
stages
bpf_probe.h
define_custom_trace.h
define_trace.h
perf.h
syscall.h
trace_custom_events.h
trace_events.h