From: Borislav Petkov <bp@alien8.de>
To: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: linux-arch <linux-arch@vger.kernel.org>,
linux-s390@vger.kernel.org, Arnd Bergmann <arnd@arndb.de>,
x86@kernel.org, Heiko Carstens <heiko.carstens@de.ibm.com>,
linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org,
Ingo Molnar <mingo@redhat.com>,
linux-mtd@lists.infradead.org,
Andrew Morton <akpm@linux-foundation.org>,
linuxppc-dev@lists.ozlabs.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v2 11/11] compiler: allow all arches to enable CONFIG_OPTIMIZE_INLINING
Date: Mon, 22 Apr 2019 12:14:20 +0200 [thread overview]
Message-ID: <20190422101420.GA21457@zn.tnic> (raw)
In-Reply-To: <20190419094754.24667-12-yamada.masahiro@socionext.com>
On Fri, Apr 19, 2019 at 06:47:54PM +0900, Masahiro Yamada wrote:
> Commit 60a3cdd06394 ("x86: add optimized inlining") introduced
> CONFIG_OPTIMIZE_INLINING, but it has been available only for x86.
>
> The idea is obviously arch-agnostic. This commit moves the config
> entry from arch/x86/Kconfig.debug to lib/Kconfig.debug so that all
> architectures can benefit from it.
>
> This can make a huge difference in kernel image size especially when
> CONFIG_OPTIMIZE_FOR_SIZE is enabled.
>
> For example, I got 3.5% smaller arm64 kernel for v5.1-rc1.
>
> dec file
> 18983424 arch/arm64/boot/Image.before
> 18321920 arch/arm64/boot/Image.after
>
> This also slightly improves the "Kernel hacking" Kconfig menu as
> e61aca5158a8 ("Merge branch 'kconfig-diet' from Dave Hansen') suggested;
> this config option would be a good fit in the "compiler option" menu.
>
> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
> ---
>
> Changes in v2:
> - split into a separate patch
>
> arch/x86/Kconfig | 3 ---
> arch/x86/Kconfig.debug | 14 --------------
> include/linux/compiler_types.h | 3 +--
> lib/Kconfig.debug | 14 ++++++++++++++
> 4 files changed, 15 insertions(+), 19 deletions(-)
Acked-by: Borislav Petkov <bp@suse.de>
--
Regards/Gruss,
Boris.
Good mailing practices for 400: avoid top-posting and trim the reply.
prev parent reply other threads:[~2019-04-22 10:16 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-19 9:47 [PATCH v2 00/11] compiler: allow all arches to enable CONFIG_OPTIMIZE_INLINING Masahiro Yamada
2019-04-19 9:47 ` [PATCH v2 01/11] ARM: prevent tracing IPI_CPU_BACKTRACE Masahiro Yamada
2019-04-19 9:47 ` [PATCH v2 02/11] arm64: mark (__)cpus_have_const_cap as __always_inline Masahiro Yamada
2019-04-19 9:47 ` [PATCH v2 03/11] MIPS: mark mult_sh_align_mod() " Masahiro Yamada
2019-04-19 9:47 ` [PATCH v2 04/11] s390/cpacf: mark scpacf_query() " Masahiro Yamada
2019-04-19 9:47 ` [PATCH v2 05/11] mtd: rawnand: vf610_nfc: add initializer to avoid -Wmaybe-uninitialized Masahiro Yamada
2019-04-19 9:47 ` [PATCH v2 06/11] MIPS: mark __fls() as __always_inline Masahiro Yamada
2019-04-19 15:45 ` Mathieu Malaterre
2019-04-23 3:23 ` Masahiro Yamada
2019-04-19 9:47 ` [PATCH v2 07/11] ARM: mark setup_machine_tags() stub as __init __noreturn Masahiro Yamada
2019-04-19 9:47 ` [PATCH v2 08/11] powerpc/prom_init: mark prom_getprop() and prom_getproplen() as __init Masahiro Yamada
2019-04-19 9:47 ` [PATCH v2 09/11] powerpc/mm/radix: mark __radix__flush_tlb_range_psize() as __always_inline Masahiro Yamada
2019-04-19 9:47 ` [PATCH v2 10/11] powerpc/mm/radix: mark as __tlbie_pid() and friends as__always_inline Masahiro Yamada
2019-04-19 9:47 ` [PATCH v2 11/11] compiler: allow all arches to enable CONFIG_OPTIMIZE_INLINING Masahiro Yamada
2019-04-22 10:14 ` Borislav Petkov [this message]
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