linux-kernel - Re: objtool warning: "duplicate frame pointer save"

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Message-ID: <CA+55aFy2o8_M7XqZV__sTS0z+a_Wqr7tjHPm8tN0ZMdErFQXRQ@mail.gmail.com>
Date:	Wed, 25 May 2016 16:51:21 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Josh Poimboeuf <jpoimboe@...hat.com>
Cc:	Ingo Molnar <mingo@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	DRI <dri-devel@...ts.freedesktop.org>
Subject: Re: objtool warning: "duplicate frame pointer save"

On Wed, May 25, 2016 at 10:56 AM, Josh Poimboeuf <jpoimboe@...hat.com> wrote:
>
> I used to have a STACKTOOL_IGNORE_INSN macro that would tell the tool to
> skip warnings for specific instructions in inline asm:
>
> Here's an example of it how it was used:

Ok, looking at that, I'm starting to suspect that it is simpler to
just use STACK_FRAME_NON_STANDARD and mark the two functions that use
this particular inline asm with the odd %rbp problem.

It's a rather special case, after all.

                 Linus