linux-kernel - Re: [PATCH 4/4] objtool: orc_gen: Move orc

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Date:   Fri, 5 Jun 2020 11:17:14 +0200 (CEST)
From:   Miroslav Benes <mbenes@...e.cz>
To:     Julien Thierry <jthierry@...hat.com>
cc:     linux-kernel@...r.kernel.org, jpoimboe@...hat.com,
        peterz@...radead.org, mhelsley@...are.com
Subject: Re: [PATCH 4/4] objtool: orc_gen: Move orc_entry out of instruction
 structure

Hi,

a nit below...

On Thu, 4 Jun 2020, Julien Thierry wrote:

> One orc_entry is associated with each instruction in the object file,
> but having the orc_entry contained by the instruction structure forces
> architectures not implementing the orc subcommands to provide a dummy
> definition of the orc_entry.
> 
> Avoid that by having orc_entries in a separate list, part of the
> objtool_file.

>  int create_orc(struct objtool_file *file)
>  {
>  	struct instruction *insn;
>  
>  	for_each_insn(file, insn) {
> -		struct orc_entry *orc = &insn->orc;
>  		struct cfi_reg *cfa = &insn->cfi.cfa;
>  		struct cfi_reg *bp = &insn->cfi.regs[CFI_BP];
> +		struct orc_entry *orc;
> +		struct orc_data *od;
> +
> +		if (!insn->sec->text)
> +			continue;

You have the same check added by the previous check a couple of lines 
below.

> +		od = calloc(1, sizeof(*od));
> +		if (!od)
> +			return -1;
> +		od->insn = insn;
> +		list_add_tail(&od->list, &file->orc_data_list);
> +
> +		orc = &od->orc;
>  
>  		if (!insn->sec->text)
>  			continue;

Here.

The rest looks good to me, but I should probably check again with a 
clearer head.

Overall, the patch set is a nice improvement.

Miroslav