From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: david laight <david.laight@runbox.com>
Cc: Yury Norov <yury.norov@gmail.com>,
Steven Rostedt <rostedt@goodmis.org>,
Masami Hiramatsu <mhiramat@kernel.org>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Randy Dunlap <rdunlap@infradead.org>,
Ingo Molnar <mingo@kernel.org>,
Jani Nikula <jani.nikula@linux.intel.com>,
Joonas Lahtinen <joonas.lahtinen@linux.intel.com>,
Rodrigo Vivi <rodrigo.vivi@intel.com>,
Tvrtko Ursulin <tursulin@ursulin.net>,
Petr Pavlu <petr.pavlu@suse.com>,
Daniel Gomez <da.gomez@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"Rafael J. Wysocki" <rafael@kernel.org>,
Danilo Krummrich <dakr@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org, intel-gfx@lists.freedesktop.org,
dri-devel@lists.freedesktop.org, linux-modules@vger.kernel.org,
linux-trace-kernel@vger.kernel.org
Subject: Re: [PATCH 3/3] tracing: move tracing declarations from kernel.h to a dedicated header
Date: Mon, 1 Dec 2025 04:50:42 +0200 [thread overview]
Message-ID: <aS0CgnvRfQtam0uU@smile.fi.intel.com> (raw)
In-Reply-To: <20251130230925.376b5377@pumpkin>
On Sun, Nov 30, 2025 at 11:09:25PM +0000, david laight wrote:
> On Sun, 30 Nov 2025 21:44:46 +0200
> Andy Shevchenko <andriy.shevchenko@linux.intel.com> wrote:
...
> It is worth checking whether the files get included anyway, and whether it
> really makes that much difference.
>
> Fiddling with kernel.h and extracting small 'leaf' headers from it is also
> unlikely to make a big difference.
It makes a big difference for the kernel.h and its (ab)users.
Especially when we have cyclic dependencies and "include everything"
cases due to other _headers_ including kernel.h.
> Try adding a syntax error to (say) sys/ioctl.h and see where it is included
> from the first time - I suspect you'll be surprised.
> Working on that include list might be more fruitful (in reducing build times).
kernel.h elimination (in the form it exists right now) is very fruitful.
However, you may help with the (say) ioctl.h or whatever you consider
really fruitful, we all will thank you (no jokes).
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2025-12-01 2:50 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-29 19:52 [PATCH 0/3] Unload linux/kernel.h Yury Norov (NVIDIA)
2025-11-29 19:53 ` [PATCH 1/3] kernel.h: drop STACK_MAGIC macro Yury Norov (NVIDIA)
2025-11-29 20:32 ` Andy Shevchenko
2025-11-29 23:40 ` Randy Dunlap
2025-12-01 7:46 ` Jani Nikula
2025-12-02 20:58 ` Andi Shyti
2025-12-02 21:18 ` Yury Norov
2025-12-03 7:40 ` Jani Nikula
2025-12-01 9:38 ` Christophe Leroy (CS GROUP)
2025-12-02 2:50 ` Yury Norov
2025-12-02 7:37 ` Andy Shevchenko
2025-11-29 19:53 ` [PATCH 2/3] kernel.h: move VERIFY_OCTAL_PERMISSIONS() to sysfs.h Yury Norov (NVIDIA)
2025-11-29 20:24 ` Andy Shevchenko
2025-11-29 20:33 ` Andy Shevchenko
2025-11-29 20:35 ` Andy Shevchenko
2025-11-30 17:56 ` Yury Norov
2025-11-30 19:35 ` Andy Shevchenko
2025-11-30 6:19 ` Randy Dunlap
2025-11-30 17:42 ` Yury Norov
2025-11-30 19:38 ` Andy Shevchenko
2025-12-01 19:51 ` Randy Dunlap
2025-12-01 20:00 ` Andy Shevchenko
2025-11-30 18:27 ` Yury Norov
2025-11-30 19:42 ` Andy Shevchenko
2025-12-01 19:01 ` Petr Pavlu
2025-12-01 19:20 ` Andy Shevchenko
2025-11-29 19:53 ` [PATCH 3/3] tracing: move tracing declarations from kernel.h to a dedicated header Yury Norov (NVIDIA)
2025-11-29 20:30 ` Andy Shevchenko
2025-11-30 18:16 ` Yury Norov
2025-11-30 19:44 ` Andy Shevchenko
2025-11-30 20:36 ` Steven Rostedt
2025-11-30 23:09 ` david laight
2025-12-01 2:50 ` Andy Shevchenko [this message]
2025-12-01 10:16 ` david laight
2025-12-01 15:37 ` Andy Shevchenko
2025-11-30 20:34 ` Steven Rostedt
2025-11-29 20:02 ` ✗ LGCI.VerificationFailed: failure for Unload linux/kernel.h Patchwork
2025-11-30 18:01 ` ✗ LGCI.VerificationFailed: failure for Unload linux/kernel.h (rev2) Patchwork
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