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Steven Rostedt (Google) 84f4be2093 tracing: Add ioctl() to force ring buffer waiters to wake up 
commit 01b2a52171 upstream.

If a process is waiting on the ring buffer for data, there currently isn't
a clean way to force it to wake up. Add an ioctl call that will force any
tasks that are waiting on the trace_pipe_raw file to wake up.

Link: https://lkml.kernel.org/r/20220929095029.117f913f@gandalf.local.home

Cc: stable@vger.kernel.org
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Fixes: e30f53aad2 ("tracing: Do not busy wait in buffer splice")
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-10-26 12:34:31 +02:00
arch
powerpc/boot: Explicitly disable usage of SPE instructions
2022-10-26 12:34:25 +02:00
block
block: blk_queue_enter() / __bio_queue_enter() must return -EAGAIN for nowait
2022-09-23 14:15:48 +02:00
certs
certs/blacklist_hashes.c: fix const confusion in certs blacklist
2022-06-22 14:22:01 +02:00
crypto
KEYS: asymmetric: enforce SM2 signature use pkey algo
2022-08-17 14:24:28 +02:00
Documentation
fs: record I_DIRTY_TIME even if inode already has I_DIRTY_INODE
2022-10-26 12:34:27 +02:00
drivers
fbdev: smscufx: Fix use-after-free in ufx_ops_open()
2022-10-26 12:34:26 +02:00
fs
ext4: update 'state->fc_regions_size' after successful memory allocation
2022-10-26 12:34:30 +02:00
include
tracing: Wake up ring buffer waiters on closing of the file
2022-10-26 12:34:31 +02:00
init
stack: Declare {randomize_,}kstack_offset to fix Sparse warnings
2022-08-17 14:23:10 +02:00
ipc
ipc/mqueue: use get_tree_nodev() in mqueue_get_tree()
2022-06-09 10:23:10 +02:00
kernel
tracing: Add ioctl() to force ring buffer waiters to wake up
2022-10-26 12:34:31 +02:00
lib
crypto: lib - remove unneeded selection of XOR_BLOCKS
2022-09-05 10:30:03 +02:00
LICENSES
LICENSES/dual/CC-BY-4.0: Git rid of "smart quotes"
2021-07-15 06:31:24 -06:00
mm
mm/mmap: undo ->mmap() when arch_validate_flags() fails
2022-10-26 12:34:24 +02:00
net
wifi: mac80211: fix MBSSID parsing use-after-free
2022-10-15 07:59:05 +02:00
samples
samples/landlock: Format with clang-format
2022-06-09 10:23:23 +02:00
scripts
Makefile.extrawarn: Move -Wcast-function-type-strict to W=1
2022-10-12 09:53:26 +02:00
security
hardening: Remove Clang's enable flag for -ftrivial-auto-var-init=zero
2022-10-26 12:34:28 +02:00
sound
ASoC: wcd934x: fix order of Slimbus unprepare/disable
2022-10-26 12:34:21 +02:00
tools
perf parse-events: Identify broken modifiers
2022-10-12 09:53:28 +02:00
usr
usr/include/Makefile: add linux/nfc.h to the compile-test coverage
2022-02-01 17:27:15 +01:00
virt
KVM: SEV: add cache flush to solve SEV cache incoherency issues
2022-09-23 14:15:52 +02:00
.clang-format
clang-format: Update with the latest for_each macro list
2021-05-12 23:32:39 +02:00
.cocciconfig
scripts: add Linux .cocciconfig for coccinelle
2016-07-22 12:13:39 +02:00
.get_maintainer.ignore
Opt out of scripts/get_maintainer.pl
2019-05-16 10:53:40 -07:00
.gitattributes
.gitattributes: use 'dts' diff driver for dts files
2019-12-04 19:44:11 -08:00
.gitignore
.gitignore: ignore only top-level modules.builtin
2021-05-02 00:43:35 +09:00
.mailmap
mailmap: add Andrej Shadura
2021-10-18 20:22:03 -10:00
COPYING
COPYING: state that all contributions really are covered by this file
2020-02-10 13:32:20 -08:00
CREDITS
MAINTAINERS: Move Daniel Drake to credits
2021-09-21 08:34:58 +03:00
Kbuild
kbuild: rename hostprogs-y/always to hostprogs/always-y
2020-02-04 01:53:07 +09:00
Kconfig
kbuild: ensure full rebuild when the compiler is updated
2020-05-12 13:28:33 +09:00
MAINTAINERS
Input: goodix - add a goodix.h header file
2022-07-12 16:34:51 +02:00
Makefile
hardening: Remove Clang's enable flag for -ftrivial-auto-var-init=zero
2022-10-26 12:34:28 +02:00
README
Drop all 00-INDEX files from Documentation/
2018-09-09 15:08:58 -06:00

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.
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