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https://gitee.com/bianbu-linux/linux-6.6
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12a5b00a53
The code, #undef CONFIG_OPTIMIZE_INLINING, is not working as expected because <linux/compiler_types.h> is parsed before vclock_gettime.c since28128c61e0("kconfig.h: Include compiler types to avoid missed struct attributes"). Since then, <linux/compiler_types.h> is included really early by using the '-include' option. So, you cannot negate the decision of <linux/compiler_types.h> in this way. You can confirm it by checking the pre-processed code, like this: $ make arch/x86/entry/vdso/vdso32/vclock_gettime.i There is no difference with/without CONFIG_CC_OPTIMIZE_FOR_SIZE. It is about two years since28128c61e0. Nobody has reported a problem (or, nobody has even noticed the fact that this code is not working). It is ugly and unreliable to attempt to undefine a CONFIG option from C files, and anyway the inlining heuristic is up to the compiler. Just remove the broken code. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Nathan Chancellor <natechancellor@gmail.com> Acked-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Masahiro Yamada <masahiroy@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: David Miller <davem@davemloft.net> Link: http://lkml.kernel.org/r/20200220110807.32534-1-masahiroy@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
28 lines
569 B
C
28 lines
569 B
C
// SPDX-License-Identifier: GPL-2.0
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#define BUILD_VDSO32
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#ifdef CONFIG_X86_64
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/*
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* in case of a 32 bit VDSO for a 64 bit kernel fake a 32 bit kernel
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* configuration
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*/
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#undef CONFIG_64BIT
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#undef CONFIG_X86_64
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#undef CONFIG_COMPAT
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#undef CONFIG_PGTABLE_LEVELS
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#undef CONFIG_ILLEGAL_POINTER_VALUE
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#undef CONFIG_SPARSEMEM_VMEMMAP
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#undef CONFIG_NR_CPUS
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#define CONFIG_X86_32 1
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#define CONFIG_PGTABLE_LEVELS 2
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#define CONFIG_PAGE_OFFSET 0
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#define CONFIG_ILLEGAL_POINTER_VALUE 0
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#define CONFIG_NR_CPUS 1
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#define BUILD_VDSO32_64
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#endif
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#include "../vclock_gettime.c"
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