[PATCH] modpost: remove unused Elf_Sword macro

[PATCH] modpost: remove unused Elf_Sword macro

[Masahiro Yamada]

Commit 9ad21c3f3ecf ("kbuild: try harder to find symbol names in
modpost") added Elf_Sword (in a wrong way), but did not use it at all.

BTW, the current code looks weird.

The fix for the 32-bit part would be:

    Elf64_Sword    -->    Elf32_Sword

(weirdness in the prefix, Elf32_ vs Elf64_)

The fix for the 64-bit part would be:

    Elf64_Sxword   -->    Elf64_Sword

(the size is different between Sword and Sxword)

Note:

    Elf32_Sword   ==  Elf64_Sword   ==  int32_t
    Elf32_Sxword  ==  Elf64_Sxword  ==  int64_t

Anyway, let's drop unused code instead of fixing it.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---

 scripts/mod/modpost.h | 2 --
 1 file changed, 2 deletions(-)

diff --git a/scripts/mod/modpost.h b/scripts/mod/modpost.h
index 68cd4aeeae3d..620f2fd08e05 100644
--- a/scripts/mod/modpost.h
+++ b/scripts/mod/modpost.h
@@ -26,7 +26,6 @@
 #define Elf_Shdr    Elf32_Shdr
 #define Elf_Sym     Elf32_Sym
 #define Elf_Addr    Elf32_Addr
-#define Elf_Sword   Elf64_Sword
 #define Elf_Section Elf32_Half
 #define ELF_ST_BIND ELF32_ST_BIND
 #define ELF_ST_TYPE ELF32_ST_TYPE
@@ -41,7 +40,6 @@
 #define Elf_Shdr    Elf64_Shdr
 #define Elf_Sym     Elf64_Sym
 #define Elf_Addr    Elf64_Addr
-#define Elf_Sword   Elf64_Sxword
 #define Elf_Section Elf64_Half
 #define ELF_ST_BIND ELF64_ST_BIND
 #define ELF_ST_TYPE ELF64_ST_TYPE
-- 
2.34.1

Re: [PATCH] modpost: remove unused Elf_Sword macro

[Nick Desaulniers]

On Tue, Jul 26, 2022 at 9:53 AM Masahiro Yamada <masahiroy@kernel.org> wrote:
>
> Commit 9ad21c3f3ecf ("kbuild: try harder to find symbol names in
> modpost") added Elf_Sword (in a wrong way), but did not use it at all.
>
> BTW, the current code looks weird.
>
> The fix for the 32-bit part would be:
>
>     Elf64_Sword    -->    Elf32_Sword
>
> (weirdness in the prefix, Elf32_ vs Elf64_)
>
> The fix for the 64-bit part would be:
>
>     Elf64_Sxword   -->    Elf64_Sword
>
> (the size is different between Sword and Sxword)
>
> Note:
>
>     Elf32_Sword   ==  Elf64_Sword   ==  int32_t
>     Elf32_Sxword  ==  Elf64_Sxword  ==  int64_t
>
> Anyway, let's drop unused code instead of fixing it.
>
> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

Thanks for the patch!
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>

> ---
>
>  scripts/mod/modpost.h | 2 --
>  1 file changed, 2 deletions(-)
>
> diff --git a/scripts/mod/modpost.h b/scripts/mod/modpost.h
> index 68cd4aeeae3d..620f2fd08e05 100644
> --- a/scripts/mod/modpost.h
> +++ b/scripts/mod/modpost.h
> @@ -26,7 +26,6 @@
>  #define Elf_Shdr    Elf32_Shdr
>  #define Elf_Sym     Elf32_Sym
>  #define Elf_Addr    Elf32_Addr
> -#define Elf_Sword   Elf64_Sword
>  #define Elf_Section Elf32_Half
>  #define ELF_ST_BIND ELF32_ST_BIND
>  #define ELF_ST_TYPE ELF32_ST_TYPE
> @@ -41,7 +40,6 @@
>  #define Elf_Shdr    Elf64_Shdr
>  #define Elf_Sym     Elf64_Sym
>  #define Elf_Addr    Elf64_Addr
> -#define Elf_Sword   Elf64_Sxword
>  #define Elf_Section Elf64_Half
>  #define ELF_ST_BIND ELF64_ST_BIND
>  #define ELF_ST_TYPE ELF64_ST_TYPE
> --
> 2.34.1
>


-- 
Thanks,
~Nick Desaulniers