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Mark-PK Tsai a8b5c425ad tracing: Avoid adding tracer option before update_tracer_options 
[ Upstream commit ef9188bcc6 ]

To prepare for support asynchronous tracer_init_tracefs initcall,
avoid calling create_trace_option_files before __update_tracer_options.
Otherwise, create_trace_option_files will show warning because
some tracers in trace_types list are already in tr->topts.

For example, hwlat_tracer call register_tracer in late_initcall,
and global_trace.dir is already created in tracing_init_dentry,
hwlat_tracer will be put into tr->topts.
Then if the __update_tracer_options is executed after hwlat_tracer
registered, create_trace_option_files find that hwlat_tracer is
already in tr->topts.

Link: https://lkml.kernel.org/r/20220426122407.17042-2-mark-pk.tsai@mediatek.com

Link: https://lore.kernel.org/lkml/20220322133339.GA32582@xsang-OptiPlex-9020/
Reported-by: kernel test robot <oliver.sang@intel.com>
Signed-off-by: Mark-PK Tsai <mark-pk.tsai@mediatek.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-06-14 18:41:27 +02:00
arch mips: cpc: Fix refcount leak in mips_cpc_default_phys_base 2022-06-14 18:41:26 +02:00
block blk-mq: do not update io_ticks with passthrough requests 2022-06-14 18:41:23 +02:00
certs certs: Fix build error when CONFIG_MODULE_SIG_KEY is empty 2022-01-23 00:08:44 +09:00
crypto crypto: cryptd - Protect per-CPU resource by disabling BH. 2022-06-09 10:26:07 +02:00
Documentation regulator: mt6315-regulator: fix invalid allowed mode 2022-06-14 18:41:25 +02:00
drivers dmaengine: idxd: set DMA_INTERRUPT cap bit 2022-06-14 18:41:26 +02:00
fs afs: Fix infinite loop found by xfstest generic/676 2022-06-14 18:41:25 +02:00
include bluetooth: don't use bitmaps for random flag accesses 2022-06-14 18:41:26 +02:00
init Kconfig: Add option for asm goto w/ tied outputs to workaround clang-13 bug 2022-06-09 10:26:25 +02:00
ipc ipc/mqueue: use get_tree_nodev() in mqueue_get_tree() 2022-06-09 10:26:06 +02:00
kernel tracing: Avoid adding tracer option before update_tracer_options 2022-06-14 18:41:27 +02:00
lib bootconfig: Make the bootconfig.o as a normal object file 2022-06-14 18:41:27 +02:00
LICENSES LICENSES/LGPL-2.1: Add LGPL-2.1-or-later as valid identifiers 2021-12-16 14:33:10 +01:00
mm mm/memremap: fix missing call to untrack_pfn() in pagemap_range() 2022-06-09 10:26:28 +02:00
net bluetooth: don't use bitmaps for random flag accesses 2022-06-14 18:41:26 +02:00
samples samples/landlock: Format with clang-format 2022-06-09 10:26:22 +02:00
scripts modpost: fix removing numeric suffixes 2022-06-14 18:41:21 +02:00
security ima: remove the IMA_TEMPLATE Kconfig option 2022-06-09 10:26:25 +02:00
sound ASoC: fsl_sai: Fix FSL_SAI_xDR/xFR definition 2022-06-14 18:41:20 +02:00
tools perf c2c: Fix sorting in percent_rmt_hitm_cmp() 2022-06-14 18:41:26 +02:00
usr kbuild: remove include/linux/cyclades.h from header file check 2022-01-27 08:51:08 +01:00
virt KVM: Free new dirty bitmap if creating a new memslot fails 2022-05-25 09:59:03 +02:00
.clang-format genirq/msi: Make interrupt allocation less convoluted 2021-12-16 22:22:20 +01:00
.cocciconfig
.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 MAINTAINERS: Update Jisheng's email address 2022-03-08 17:30:32 +01:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: replace a Microchip AT91 maintainer 2022-02-09 11:30:01 +01:00
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 net: dsa: realtek-smi: move to subdirectory 2022-04-08 13:58:12 +02:00
Makefile Linux 5.17.14 2022-06-09 10:26:33 +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.