linux-kernel - [PATCH RFC] init/Kconfig: enable -O3 for all arches

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Date:   Tue, 10 Dec 2019 15:56:57 +0100
From:   Oleksandr Natalenko <oleksandr@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jessica Yu <jeyu@...nel.org>, Tejun Heo <tj@...nel.org>,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        Joel Fernandes <joel@...lfernandes.org>,
        David Howells <dhowells@...hat.com>,
        Patrick Bellasi <patrick.bellasi@....com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Dan Williams <dan.j.williams@...el.com>,
        "Eric W . Biederman" <ebiederm@...ssion.com>
Subject: [PATCH RFC] init/Kconfig: enable -O3 for all arches

Building a kernel with -O3 may help in hunting bugs like [1] and thus
using this switch should not be restricted to one specific arch only.

Thus lets expose it. If for some reasone we have to hide it, lets hide
it under EXPERT.

The commit is made against next-20191210 tag.

[1] https://lore.kernel.org/lkml/673b885183fb64f1cbb3ed2387524077@natalenko.name/

Signed-off-by: Oleksandr Natalenko <oleksandr@...hat.com>
---
 init/Kconfig | 1 -
 1 file changed, 1 deletion(-)

diff --git a/init/Kconfig b/init/Kconfig
index a34064a031a5..b41b18edb10e 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1228,7 +1228,6 @@ config CC_OPTIMIZE_FOR_PERFORMANCE
 
 config CC_OPTIMIZE_FOR_PERFORMANCE_O3
 	bool "Optimize more for performance (-O3)"
-	depends on ARC
 	imply CC_DISABLE_WARN_MAYBE_UNINITIALIZED  # avoid false positives
 	help
 	  Choosing this option will pass "-O3" to your compiler to optimize
-- 
2.24.0