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compiler: enable CONFIG_OPTIMIZE_INLINING forcibly 

Commit 9012d01166 ("compiler: allow all arches to enable
CONFIG_OPTIMIZE_INLINING") allowed all architectures to enable this
option.  A couple of build errors were reported by randconfig, but all of
them have been ironed out.

Towards the goal of removing CONFIG_OPTIMIZE_INLINING entirely (and it
will simplify the 'inline' macro in compiler_types.h), this commit changes
it to always-on option.  Going forward, the compiler will always be
allowed to not inline functions marked 'inline'.

This is not a problem for x86 since it has been long used by
arch/x86/configs/{x86_64,i386}_defconfig.

I am keeping the config option just in case any problem crops up for other
architectures.

The code clean-up will be done after confirming this is solid.

Link: http://lkml.kernel.org/r/20190830034304.24259-1-yamada.masahiro@socionext.com
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Nick Desaulniers <ndesaulniers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Masahiro Yamada 2019-09-25 16:47:42 -07:00 committed by Linus Torvalds
parent 9dd819a151
commit ac7c3e4ff4
1 changed files with 1 additions and 3 deletions
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4
lib/Kconfig.debug
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@ -311,7 +311,7 @@ config HEADERS_CHECK
relevant for userspace, say 'Y'. relevant for userspace, say 'Y'.
config OPTIMIZE_INLINING config OPTIMIZE_INLINING
bool "Allow compiler to uninline functions marked 'inline'" def_bool y
help help
This option determines if the kernel forces gcc to inline the functions This option determines if the kernel forces gcc to inline the functions
developers have marked 'inline'. Doing so takes away freedom from gcc to developers have marked 'inline'. Doing so takes away freedom from gcc to
@ -322,8 +322,6 @@ config OPTIMIZE_INLINING
decision will become the default in the future. Until then this option decision will become the default in the future. Until then this option
is there to test gcc for this. is there to test gcc for this.
If unsure, say N.
config DEBUG_SECTION_MISMATCH config DEBUG_SECTION_MISMATCH
bool "Enable full Section mismatch analysis" bool "Enable full Section mismatch analysis"
help help