From: Masahiro Yamada <masahiroy@kernel.org>
To: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Cc: Masahiro Yamada <masahiroy@kernel.org>,
"Jason A. Donenfeld" <Jason@zx2c4.com>,
Shuah Khan <shuah@kernel.org>,
linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org,
netdev@vger.kernel.org, wireguard@lists.zx2c4.com
Subject: [PATCH] compiler_attribute: remove CONFIG_ENABLE_MUST_CHECK
Date: Sun, 22 Nov 2020 04:43:39 +0900 [thread overview]
Message-ID: <20201121194339.52290-1-masahiroy@kernel.org> (raw)
Revert commit cebc04ba9aeb ("add CONFIG_ENABLE_MUST_CHECK").
A lot of warn_unused_result warnings existed in 2006, but until now
they have been fixed thanks to people doing allmodconfig tests.
Our goal is to always enable __must_check where appreciate, so this
CONFIG option is no longer needed.
I see a lot of defconfig (arch/*/configs/*_defconfig) files having:
# CONFIG_ENABLE_MUST_CHECK is not set
I did not touch them for now since it would be a big churn. If arch
maintainers want to clean them up, please go ahead.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
include/linux/compiler_types.h | 4 ----
lib/Kconfig.debug | 8 --------
tools/testing/selftests/wireguard/qemu/debug.config | 1 -
3 files changed, 13 deletions(-)
diff --git a/include/linux/compiler_types.h b/include/linux/compiler_types.h
index ac3fa37a84f9..02f6d3fbad9d 100644
--- a/include/linux/compiler_types.h
+++ b/include/linux/compiler_types.h
@@ -110,11 +110,7 @@ struct ftrace_likely_data {
unsigned long constant;
};
-#ifdef CONFIG_ENABLE_MUST_CHECK
#define __must_check __attribute__((__warn_unused_result__))
-#else
-#define __must_check
-#endif
#if defined(CC_USING_HOTPATCH)
#define notrace __attribute__((hotpatch(0, 0)))
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index c789b39ed527..cb8ef4fd0d02 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -286,14 +286,6 @@ config GDB_SCRIPTS
endif # DEBUG_INFO
-config ENABLE_MUST_CHECK
- bool "Enable __must_check logic"
- default y
- help
- Enable the __must_check logic in the kernel build. Disable this to
- suppress the "warning: ignoring return value of 'foo', declared with
- attribute warn_unused_result" messages.
-
config FRAME_WARN
int "Warn for stack frames larger than"
range 0 8192
diff --git a/tools/testing/selftests/wireguard/qemu/debug.config b/tools/testing/selftests/wireguard/qemu/debug.config
index b50c2085c1ac..fe07d97df9fa 100644
--- a/tools/testing/selftests/wireguard/qemu/debug.config
+++ b/tools/testing/selftests/wireguard/qemu/debug.config
@@ -1,5 +1,4 @@
CONFIG_LOCALVERSION="-debug"
-CONFIG_ENABLE_MUST_CHECK=y
CONFIG_FRAME_POINTER=y
CONFIG_STACK_VALIDATION=y
CONFIG_DEBUG_KERNEL=y
--
2.25.1
next reply other threads:[~2020-11-21 19:53 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-21 19:43 Masahiro Yamada [this message]
2020-11-21 20:45 ` [PATCH] compiler_attribute: remove CONFIG_ENABLE_MUST_CHECK Miguel Ojeda
2020-11-23 3:36 ` Masahiro Yamada
2020-11-23 17:00 ` Miguel Ojeda
2020-11-27 15:55 ` Miguel Ojeda
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