mbox series

[v5,00/21] Unify <linux/export.h> and <asm/export.h>, remove EXPORT_DATA_SYMBOL(), faster TRIM_UNUSED_KSYMS

Message ID 20230514152739.962109-1-masahiroy@kernel.org (mailing list archive)
Headers show
Series Unify <linux/export.h> and <asm/export.h>, remove EXPORT_DATA_SYMBOL(), faster TRIM_UNUSED_KSYMS | expand

Message

Masahiro Yamada May 14, 2023, 3:27 p.m. UTC 
This patch set refactors modpost first to make it easier to
add new code.

My goals:

 - Refactors EXPORT_SYMBOL, <linux/export.h> and <asm/export.h>.
   You can still put EXPORT_SYMBOL() in *.S file, very close to the definition,
   but you do not need to care about whether it is a function or a data.
   This removes EXPORT_DATA_SYMBOL().

 - Re-implement TRIM_UNUSED_KSYMS in one-pass.
   This makes the building faster.

 - Move the static EXPORT_SYMBOL check to modpost.
   This also makes the building faster.

Previous version
v4: https://lore.kernel.org/linux-kbuild/CAK7LNASDzy9RERN6+q6WgR4ROYZQue=SBqgbcoYuVePByHtk6Q@mail.gmail.com/T/#t
v3: https://lore.kernel.org/all/20220928063947.299333-1-masahiroy@kernel.org/



Masahiro Yamada (21):
  modpost: remove broken calculation of exception_table_entry size
  modpost: remove fromsym info in __ex_table section mismatch warning
  modpost: remove get_prettyname()
  modpost: squash report_extable_warnings() into
    extable_mismatch_handler()
  modpost: squash report_sec_mismatch() into default_mismatch_handler()
  modpost: clean up is_executable_section()
  modpost: squash extable_mismatch_handler() into
    default_mismatch_handler()
  modpost: pass 'tosec' down to default_mismatch_handler()
  modpost: pass section index to find_elf_symbol2()
  modpost: rename find_elf_symbol() and find_elf_symbol2()
  modpost: modpost: refactor find_fromsym() and find_tosym()
  modpost: unify 'sym' and 'to' in default_mismatch_handler()
  modpost: replace r->r_offset, r->r_addend with faddr, taddr
  modpost: remove is_shndx_special() check from section_rel(a)
  modpost: pass struct module pointer to check_section_mismatch()
  kbuild: generate KSYMTAB entries by modpost
  ia64,export.h: replace EXPORT_DATA_SYMBOL* with EXPORT_SYMBOL*
  modpost: check static EXPORT_SYMBOL* by modpost again
  modpost: squash sym_update_namespace() into sym_add_exported()
  modpost: use null string instead of NULL pointer for default namespace
  kbuild: implement CONFIG_TRIM_UNUSED_KSYMS without recursion

 .gitignore                        |   1 -
 Makefile                          |  19 +-
 arch/ia64/include/asm/Kbuild      |   1 +
 arch/ia64/include/asm/export.h    |   3 -
 arch/ia64/kernel/head.S           |   2 +-
 arch/ia64/kernel/ivt.S            |   2 +-
 include/asm-generic/export.h      |  83 +----
 include/asm-generic/vmlinux.lds.h |   1 +
 include/linux/export-internal.h   |  49 +++
 include/linux/export.h            | 119 ++-----
 include/linux/pm.h                |   8 +-
 kernel/module/internal.h          |  12 +
 scripts/Makefile.build            |  19 +-
 scripts/Makefile.modpost          |   7 +
 scripts/adjust_autoksyms.sh       |  73 ----
 scripts/basic/fixdep.c            |   3 +-
 scripts/check-local-export        |  70 ----
 scripts/gen_ksymdeps.sh           |  30 --
 scripts/mod/modpost.c             | 561 ++++++++++++------------------
 scripts/mod/modpost.h             |   1 +
 scripts/remove-stale-files        |   2 +
 21 files changed, 343 insertions(+), 723 deletions(-)
 delete mode 100644 arch/ia64/include/asm/export.h
 delete mode 100755 scripts/adjust_autoksyms.sh
 delete mode 100755 scripts/check-local-export
 delete mode 100755 scripts/gen_ksymdeps.sh

Comments

Masahiro Yamada May 21, 2023, 1:15 p.m. UTC | #1 
On Mon, May 15, 2023 at 12:27 AM Masahiro Yamada <masahiroy@kernel.org> wrote:
>
>
> This patch set refactors modpost first to make it easier to
> add new code.
>
> My goals:
>
>  - Refactors EXPORT_SYMBOL, <linux/export.h> and <asm/export.h>.
>    You can still put EXPORT_SYMBOL() in *.S file, very close to the definition,
>    but you do not need to care about whether it is a function or a data.
>    This removes EXPORT_DATA_SYMBOL().
>
>  - Re-implement TRIM_UNUSED_KSYMS in one-pass.
>    This makes the building faster.
>
>  - Move the static EXPORT_SYMBOL check to modpost.
>    This also makes the building faster.
>
> Previous version
> v4: https://lore.kernel.org/linux-kbuild/CAK7LNASDzy9RERN6+q6WgR4ROYZQue=SBqgbcoYuVePByHtk6Q@mail.gmail.com/T/#t
> v3: https://lore.kernel.org/all/20220928063947.299333-1-masahiroy@kernel.org/
>


01-10 applied to linux-kbuild.

I will send v6 for the rest.



>
> Masahiro Yamada (21):
>   modpost: remove broken calculation of exception_table_entry size
>   modpost: remove fromsym info in __ex_table section mismatch warning
>   modpost: remove get_prettyname()
>   modpost: squash report_extable_warnings() into
>     extable_mismatch_handler()
>   modpost: squash report_sec_mismatch() into default_mismatch_handler()
>   modpost: clean up is_executable_section()
>   modpost: squash extable_mismatch_handler() into
>     default_mismatch_handler()
>   modpost: pass 'tosec' down to default_mismatch_handler()
>   modpost: pass section index to find_elf_symbol2()
>   modpost: rename find_elf_symbol() and find_elf_symbol2()
>   modpost: modpost: refactor find_fromsym() and find_tosym()
>   modpost: unify 'sym' and 'to' in default_mismatch_handler()
>   modpost: replace r->r_offset, r->r_addend with faddr, taddr
>   modpost: remove is_shndx_special() check from section_rel(a)
>   modpost: pass struct module pointer to check_section_mismatch()
>   kbuild: generate KSYMTAB entries by modpost
>   ia64,export.h: replace EXPORT_DATA_SYMBOL* with EXPORT_SYMBOL*
>   modpost: check static EXPORT_SYMBOL* by modpost again
>   modpost: squash sym_update_namespace() into sym_add_exported()
>   modpost: use null string instead of NULL pointer for default namespace
>   kbuild: implement CONFIG_TRIM_UNUSED_KSYMS without recursion
>
>  .gitignore                        |   1 -
>  Makefile                          |  19 +-
>  arch/ia64/include/asm/Kbuild      |   1 +
>  arch/ia64/include/asm/export.h    |   3 -
>  arch/ia64/kernel/head.S           |   2 +-
>  arch/ia64/kernel/ivt.S            |   2 +-
>  include/asm-generic/export.h      |  83 +----
>  include/asm-generic/vmlinux.lds.h |   1 +
>  include/linux/export-internal.h   |  49 +++
>  include/linux/export.h            | 119 ++-----
>  include/linux/pm.h                |   8 +-
>  kernel/module/internal.h          |  12 +
>  scripts/Makefile.build            |  19 +-
>  scripts/Makefile.modpost          |   7 +
>  scripts/adjust_autoksyms.sh       |  73 ----
>  scripts/basic/fixdep.c            |   3 +-
>  scripts/check-local-export        |  70 ----
>  scripts/gen_ksymdeps.sh           |  30 --
>  scripts/mod/modpost.c             | 561 ++++++++++++------------------
>  scripts/mod/modpost.h             |   1 +
>  scripts/remove-stale-files        |   2 +
>  21 files changed, 343 insertions(+), 723 deletions(-)
>  delete mode 100644 arch/ia64/include/asm/export.h
>  delete mode 100755 scripts/adjust_autoksyms.sh
>  delete mode 100755 scripts/check-local-export
>  delete mode 100755 scripts/gen_ksymdeps.sh
>
> --
> 2.39.2
>