linux-kernel - Re: [PATCH v2 02/10] kbuild: do not remove empty *.symtypes explicitly

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Message-ID: <YkygKePc7rP7PqRL@fjasle.eu>
Date:   Tue, 5 Apr 2022 22:01:45 +0200
From:   Nicolas Schier <nicolas@...sle.eu>
To:     Masahiro Yamada <masahiroy@...nel.org>
Cc:     linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
        Michal Marek <michal.lkml@...kovi.net>,
        Nick Desaulniers <ndesaulniers@...gle.com>
Subject: Re: [PATCH v2 02/10] kbuild: do not remove empty *.symtypes
 explicitly

On Tue, Apr 05, 2022 at 08:33:50PM +0900 Masahiro Yamada wrote:
> Presumably, 'test -s $@ || rm -f $@' intends to remove the output when
> the genksyms command fails.
> 
> It is unneeded because .DELETE_ON_ERROR automatically removes the output
> on failure.
> 
> Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
> ---

Reviewed-by: Nicolas Schier <nicolas@...sle.eu>

> 
> Changes in v2:
>   - Fix accidental drop of '> /dev/null'
> 
>  scripts/Makefile.build | 8 ++------
>  1 file changed, 2 insertions(+), 6 deletions(-)
> 
> diff --git a/scripts/Makefile.build b/scripts/Makefile.build
> index 31e0e33dfe5d..3ef2373f0a57 100644
> --- a/scripts/Makefile.build
> +++ b/scripts/Makefile.build
> @@ -135,9 +135,7 @@ genksyms = scripts/genksyms/genksyms		\
>  cmd_gensymtypes_c = $(CPP) -D__GENKSYMS__ $(c_flags) $< | $(genksyms)
>  
>  quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@
> -cmd_cc_symtypes_c =                                                         \
> -    $(call cmd_gensymtypes_c,true,$@) >/dev/null;                           \
> -    test -s $@ || rm -f $@
> +      cmd_cc_symtypes_c = $(call cmd_gensymtypes_c,true,$@) >/dev/null
>  
>  $(obj)/%.symtypes : $(src)/%.c FORCE
>  	$(call cmd,cc_symtypes_c)
> @@ -348,9 +346,7 @@ cmd_gensymtypes_S =                                                         \
>      $(CPP) -D__GENKSYMS__ $(c_flags) -xc - | $(genksyms)
>  
>  quiet_cmd_cc_symtypes_S = SYM $(quiet_modtag) $@
> -cmd_cc_symtypes_S =                                                         \
> -    $(call cmd_gensymtypes_S,true,$@) >/dev/null;                           \
> -    test -s $@ || rm -f $@
> +      cmd_cc_symtypes_S = $(call cmd_gensymtypes_S,true,$@) >/dev/null
>  
>  $(obj)/%.symtypes : $(src)/%.S FORCE
>  	$(call cmd,cc_symtypes_S)
> -- 
> 2.32.0
> 
> 

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