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Re: [RFC v2 4/7] asm/sections: add a generic push_section_tbl()

From "H. Peter Anvin" <hpa@zytor.com>
Newsgroups linux.kernel
Subject Re: [RFC v2 4/7] asm/sections: add a generic push_section_tbl()
Date 2016-02-19 21:40 +0100
Message-ID <r400i-2qQ-17@gated-at.bofh.it> (permalink)
References <r3TBv-5OY-1@gated-at.bofh.it> <r3TBw-5OY-25@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On 02/19/2016 05:45 AM, Luis R. Rodriguez wrote:
> With a generic linker tables solution in place we
> need a general asm solution for declaring entries
> with asm. The first easy target is to cover the C
> asm declarations, guard the header file for now
> and define a first generic entry push_section_tbl()
> to be used later for custom linker table annotations.
> 
> Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org>
> ---
>  include/asm-generic/sections.h | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/include/asm-generic/sections.h b/include/asm-generic/sections.h
> index af0254c09424..f5ea98bd85d2 100644
> --- a/include/asm-generic/sections.h
> +++ b/include/asm-generic/sections.h
> @@ -3,8 +3,10 @@
>  
>  /* References to section boundaries */
>  
> +#ifndef __ASSEMBLY__
>  #include <linux/compiler.h>
>  #include <linux/types.h>
> +#include <linux/sections.h>
>  
>  /*
>   * Usage guidelines:
> @@ -128,4 +130,12 @@ static inline bool init_section_intersects(void *virt, size_t size)
>  	return memory_intersects(__init_begin, __init_end, virt, size);
>  }
>  
> +/*
> + * Some architectures do not like the "\t" at the end (s39), we should be
> + * able to generalize this further, but so far this covers most architectures.
> + */
> +#define push_section_tbl(section, name, level, flags)			\
> +	".pushsection " SECTION_TBL(section,name,level) ",  \"" #flags "\"\n\t"
> +#endif
> +

I think the \n\t is unnecessary.

	-hpa

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Thread

[RFC v2 0/7] linux: add linker tables "Luis R. Rodriguez" <mcgrof@kernel.org> - 2016-02-19 14:50 +0100
  [RFC v2 3/7] firmware: port built-in section to linker table "Luis R. Rodriguez" <mcgrof@kernel.org> - 2016-02-19 14:50 +0100
  [RFC v2 6/7] dynamic_debug: port to use linker tables "Luis R. Rodriguez" <mcgrof@kernel.org> - 2016-02-19 14:50 +0100
  [RFC v2 5/7] jump_label: port __jump_table to linker tables "Luis R. Rodriguez" <mcgrof@kernel.org> - 2016-02-19 14:50 +0100
  [RFC v2 1/7] sections.h: add sections header to collect all section info "Luis R. Rodriguez" <mcgrof@kernel.org> - 2016-02-19 14:50 +0100
    Re: [RFC v2 1/7] sections.h: add sections header to collect all  section info Greg KH <gregkh@linuxfoundation.org> - 2016-02-19 17:30 +0100
      Re: [RFC v2 1/7] sections.h: add sections header to collect all  section info "Luis R. Rodriguez" <mcgrof@suse.com> - 2016-02-19 21:10 +0100
        Re: [RFC v2 1/7] sections.h: add sections header to collect all  section info Greg KH <gregkh@linuxfoundation.org> - 2016-02-19 22:30 +0100
          Re: [RFC v2 1/7] sections.h: add sections header to collect all  section info "Luis R. Rodriguez" <mcgrof@kernel.org> - 2016-02-19 23:10 +0100
  [RFC v2 4/7] asm/sections: add a generic push_section_tbl() "Luis R. Rodriguez" <mcgrof@kernel.org> - 2016-02-19 14:50 +0100
    Re: [RFC v2 4/7] asm/sections: add a generic push_section_tbl() "H. Peter Anvin" <hpa@zytor.com> - 2016-02-19 21:40 +0100
      Re: [RFC v2 4/7] asm/sections: add a generic push_section_tbl() "Luis R. Rodriguez" <mcgrof@kernel.org> - 2016-02-19 22:10 +0100
        Re: [RFC v2 4/7] asm/sections: add a generic push_section_tbl() "H. Peter Anvin" <hpa@zytor.com> - 2016-02-22 04:00 +0100
  [RFC v2 7/7] kprobes: port to linker table "Luis R. Rodriguez" <mcgrof@kernel.org> - 2016-02-19 14:50 +0100
    Re: [RFC v2 7/7] kprobes: port to linker table Russell King - ARM Linux <linux@arm.linux.org.uk> - 2016-02-19 15:20 +0100
      Re: [RFC v2 7/7] kprobes: port to linker table "Luis R. Rodriguez" <mcgrof@suse.com> - 2016-02-19 16:00 +0100
    RE: [RFC v2 7/7] kprobes: port to linker table 平松雅巳 / HIRAMATU,MASAMI   <masami.hiramatsu.pt@hitachi.com> - 2016-02-22 02:40 +0100
  Re: [RFC v2 0/7] linux: add linker tables "H. Peter Anvin" <hpa@zytor.com> - 2016-02-19 21:30 +0100
    Re: [RFC v2 0/7] linux: add linker tables "Luis R. Rodriguez" <mcgrof@kernel.org> - 2016-02-19 22:30 +0100
  Re: [RFC v2 2/7] tables.h: add linker table support "H. Peter Anvin" <hpa@zytor.com> - 2016-02-19 21:40 +0100
    Re: [RFC v2 2/7] tables.h: add linker table support "Luis R. Rodriguez" <mcgrof@kernel.org> - 2016-02-19 22:50 +0100
  Re: [RFC v2 2/7] tables.h: add linker table support "H. Peter Anvin" <hpa@zytor.com> - 2016-02-19 21:40 +0100
    Re: [RFC v2 2/7] tables.h: add linker table support "Luis R. Rodriguez" <mcgrof@suse.com> - 2016-02-19 22:20 +0100

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