[RFC PATCH v2 0/2] call check-atomics.sh only if prerequisites change

From: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
To: Masahiro Yamada <yamada.masahiro@socionext.com>,
	Nathan Chancellor <nathan@kernel.org>,
	Nick Desaulniers <ndesaulniers@google.com>,
	Tom Rix <trix@redhat.com>
Cc: linux-kernel@vger.kernel.org, Arnd Bergmann <arnd@arndb.de>,
	Andy Shevchenko <andy.shevchenko@gmail.com>,
	Rikard Falkeborn <rikard.falkeborn@gmail.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Kees Cook <keescook@chromium.org>, Will Deacon <will@kernel.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Subject: [RFC PATCH v2 0/2] call check-atomics.sh only if prerequisites change
Date: Sat,  7 May 2022 22:11:43 +0900	[thread overview]
Message-ID: <20220507131146.834810-1-mailhol.vincent@wanadoo.fr> (raw)
In-Reply-To: <20220426155229.436681-1-mailhol.vincent@wanadoo.fr>

Currently, check-atomics.sh is executed unconditionally despite the
fact that most developers do not need this to execute this check on
each iterative make instance.

This series first make check-atomics.sh raise an error instead of a
warning when CONFIG_WERROR is set. The second and last patch modifies
Kbuild so that the script is only called when dependencies are
changed.

* Changelog *

v1 -> v2

  * drop the changes on checksyscalls.sh. v1 assumed that
    checksyscalls.sh would only be called from ./Kbuild. It appears
    that there is another user: arch/mips/Makefile c.f. kernel test
    robot's report:
    https://lore.kernel.org/llvm/202205030015.JCmg5yPS-lkp@intel.com/

  * add a patch to the to make Kbuild stop if check-atomics fails and
    if CONFIG_WERROR is set.

Vincent Mailhol (2):
  check-atomiscs: stop build if CONFIG_WERROR=y
  kbuild: call check-atomics.sh only if prerequisites change

 Kbuild                          | 7 ++++---
 Makefile                        | 3 ++-
 scripts/atomic/check-atomics.sh | 9 +++++++--
 3 files changed, 13 insertions(+), 6 deletions(-)

-- 
2.35.1