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git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
synced 2026-11-01 06:46:35 +01:00
Petr Pavlu
d29d64afa2
With CONFIG_MEM_ALLOC_PROFILING=n, vmlinux and all modules unnecessarily contain the symbols __start_alloc_tags and __stop_alloc_tags, which define an empty range. In the case of modules, the presence of these symbols also forces the linker to create an empty .codetag.alloc_tags section. Update codetag.lds.h to make the data conditional on CONFIG_MEM_ALLOC_PROFILING. Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Petr Pavlu <[email protected]> Reviewed-by: Kent Overstreet <[email protected]> Reviewed-by: Suren Baghdasaryan <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: Casey Chen <[email protected]> Cc: Petr Pavlu <[email protected]> Signed-off-by: Andrew Morton <[email protected]>
34 lines
935 B
C
34 lines
935 B
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#ifndef __ASM_GENERIC_CODETAG_LDS_H
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#define __ASM_GENERIC_CODETAG_LDS_H
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#ifdef CONFIG_MEM_ALLOC_PROFILING
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#define IF_MEM_ALLOC_PROFILING(...) __VA_ARGS__
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#else
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#define IF_MEM_ALLOC_PROFILING(...)
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#endif
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#define SECTION_WITH_BOUNDARIES(_name) \
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. = ALIGN(8); \
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__start_##_name = .; \
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KEEP(*(_name)) \
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__stop_##_name = .;
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#define CODETAG_SECTIONS() \
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IF_MEM_ALLOC_PROFILING(SECTION_WITH_BOUNDARIES(alloc_tags))
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#define MOD_SEPARATE_CODETAG_SECTION(_name) \
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.codetag.##_name : { \
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SECTION_WITH_BOUNDARIES(_name) \
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}
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/*
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* For codetags which might be used after module unload, therefore might stay
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* longer in memory. Each such codetag type has its own section so that we can
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* unload them individually once unused.
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*/
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#define MOD_SEPARATE_CODETAG_SECTIONS() \
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IF_MEM_ALLOC_PROFILING(MOD_SEPARATE_CODETAG_SECTION(alloc_tags))
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#endif /* __ASM_GENERIC_CODETAG_LDS_H */
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