linux-kernel - [PATCH 1/2] Kconfig: Mark -O3 as experimental

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Date:   Tue, 21 Jun 2022 15:35:25 +0200
From:   Miko Larsson <mikoxyzzz@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     Miko Larsson <mikoxyzzz@...il.com>, linux-kbuild@...r.kernel.org,
        x86@...nel.org, Nathan Chancellor <nathan@...nel.org>,
        Vlastimil Babka <vbabka@...e.cz>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Sean Christopherson <seanjc@...gle.com>,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        Arnd Bergmann <arnd@...db.de>,
        Chris Down <chris@...isdown.name>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        John Ogness <john.ogness@...utronix.de>,
        Elliot Berman <quic_eberman@...cinc.com>,
        Oleksandr Natalenko <oleksandr@...hat.com>
Subject: [PATCH 1/2] Kconfig: Mark -O3 as experimental

Mark -O3 as experimental, as it might cause unwanted regressions for
users.

Signed-off-by: Miko Larsson <mikoxyzzz@...il.com>
---
 init/Kconfig | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/init/Kconfig b/init/Kconfig
index c7900e897..9c292acb2 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1402,12 +1402,15 @@ config CC_OPTIMIZE_FOR_PERFORMANCE
 	  helpful compile-time warnings.
 
 config CC_OPTIMIZE_FOR_PERFORMANCE_O3
-	bool "Optimize more for performance (-O3)"
+	bool "Optimize more for performance (-O3) (EXPERIMENTAL)"
 	depends on ARC
 	help
 	  Choosing this option will pass "-O3" to your compiler to optimize
 	  the kernel yet more for performance.
 
+	  This option is EXPERIMENTAL; you may encounter compiler bugs and/or
+	  kernel bugs with this option enabled.
+
 config CC_OPTIMIZE_FOR_SIZE
 	bool "Optimize for size (-Os)"
 	help
-- 
2.36.1