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Masami Hiramatsu (Google) 31279e331c tracing: Fix complicated dependency of CONFIG_TRACER_MAX_TRACE 
commit e25e43a4e5 upstream.

Both CONFIG_OSNOISE_TRACER and CONFIG_HWLAT_TRACER partially enables the
CONFIG_TRACER_MAX_TRACE code, but that is complicated and has
introduced a bug; It declares tracing_max_lat_fops data structure outside
of #ifdefs, but since it is defined only when CONFIG_TRACER_MAX_TRACE=y
or CONFIG_HWLAT_TRACER=y, if only CONFIG_OSNOISE_TRACER=y, that
declaration comes to a definition(!).

To fix this issue, and do not repeat the similar problem, makes
CONFIG_OSNOISE_TRACER and CONFIG_HWLAT_TRACER enables the
CONFIG_TRACER_MAX_TRACE always. It has there benefits;
- Fix the tracing_max_lat_fops bug
- Simplify the #ifdefs
- CONFIG_TRACER_MAX_TRACE code is fully enabled, or not.

Link: https://lore.kernel.org/linux-trace-kernel/167033628155.4111793.12185405690820208159.stgit@devnote3

Fixes: 424b650f35 ("tracing: Fix missing osnoise tracer on max_latency")
Cc: Daniel Bristot de Oliveira <bristot@kernel.org>
Cc: stable@vger.kernel.org
Reported-by: David Howells <dhowells@redhat.com>
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Link: https://lore.kernel.org/all/166992525941.1716618.13740663757583361463.stgit@warthog.procyon.org.uk/ (original thread and v1)
Link: https://lore.kernel.org/all/202212052253.VuhZ2ulJ-lkp@intel.com/T/#u (v1 error report)
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-04-19 17:58:15 +08:00
arch x86/kprobes: Fix optprobe optimization check with CONFIG_RETHUNK 2023-04-19 17:58:15 +08:00
block
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drivers of/kexec: Fix reading 32-bit "linux,initrd-{start,end}" values 2023-04-19 17:58:14 +08:00
fs fs: dlm: retry accept() until -EAGAIN or error returns 2023-04-19 17:58:13 +08:00
include mptcp: remove MPTCP 'ifdef' in TCP SYN cookies 2023-04-19 17:58:13 +08:00
init
io_uring
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kernel tracing: Fix complicated dependency of CONFIG_TRACER_MAX_TRACE 2023-04-19 17:58:15 +08:00
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net mptcp: remove MPTCP 'ifdef' in TCP SYN cookies 2023-04-19 17:58:13 +08:00
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sound ALSA: hda/realtek: Apply dual codec fixup for Dell Latitude laptops 2023-04-19 17:58:13 +08:00
tools selftests: Use optional USERCFLAGS and USERLDFLAGS 2023-04-19 17:58:13 +08:00
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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.