* [PATCH RFC] init/Kconfig: enable -O3 for all arches
@ 2019-12-10 14:56 Oleksandr Natalenko
2019-12-10 15:37 ` Krzysztof Kozlowski
0 siblings, 1 reply; 2+ messages in thread
From: Oleksandr Natalenko @ 2019-12-10 14:56 UTC (permalink / raw)
To: linux-kernel
Cc: Masahiro Yamada, Andrew Morton, Greg Kroah-Hartman, Jessica Yu,
Tejun Heo, Mauro Carvalho Chehab, Joel Fernandes, David Howells,
Patrick Bellasi, Krzysztof Kozlowski, Dan Williams,
Eric W . Biederman
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@redhat.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
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH RFC] init/Kconfig: enable -O3 for all arches
2019-12-10 14:56 [PATCH RFC] init/Kconfig: enable -O3 for all arches Oleksandr Natalenko
@ 2019-12-10 15:37 ` Krzysztof Kozlowski
0 siblings, 0 replies; 2+ messages in thread
From: Krzysztof Kozlowski @ 2019-12-10 15:37 UTC (permalink / raw)
To: Oleksandr Natalenko
Cc: linux-kernel, Masahiro Yamada, Andrew Morton, Greg Kroah-Hartman,
Jessica Yu, Tejun Heo, Mauro Carvalho Chehab, Joel Fernandes,
David Howells, Patrick Bellasi, Dan Williams, Eric W . Biederman
On Tue, 10 Dec 2019 at 15:57, Oleksandr Natalenko <oleksandr@redhat.com> wrote:
>
> 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.
You are not hiding it under EXPERT so no need to document in commit
log theoretical future decisions.
> The commit is made against next-20191210 tag.
This does not belong to commit message. You can put such under the ---
separator.
Best regards,
Krzysztof
>
> [1] https://lore.kernel.org/lkml/673b885183fb64f1cbb3ed2387524077@natalenko.name/
>
> Signed-off-by: Oleksandr Natalenko <oleksandr@redhat.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
>
^ permalink raw reply [flat|nested] 2+ messages in thread
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2019-12-10 15:37 ` Krzysztof Kozlowski
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