linux-kernel - Re: [PATCH v7 03/28] x86/asm/suspend: use SYM

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Message-ID: <20190205080712.GF21801@zn.tnic>
Date:   Tue, 5 Feb 2019 09:07:12 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     Jiri Slaby <jslaby@...e.cz>
Cc:     mingo@...hat.com, linux-arch@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
        Pavel Machek <pavel@....cz>, Len Brown <len.brown@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        "H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
        linux-pm@...r.kernel.org
Subject: Re: [PATCH v7 03/28] x86/asm/suspend: use SYM_DATA for data

On Tue, Feb 05, 2019 at 08:34:09AM +0100, Jiri Slaby wrote:
> I also suggest noticing the size 0 -> 8 change ;).

Ha!

And one would think that binutils would've seen the ".quad 0" in the
previous definition and do a proper size but that wouldn't have worked
most likely, because before it was a simple label with alignment:

.globl saved_magic ; .p2align 4, 0x90 ; saved_magic: .quad 0

which didn't have a size probably because it didn't have an associated
type (or an implicit default type or so, no clue how binutils handles
labels).

VS now:

.globl saved_magic ; ; saved_magic: ; .quad 0 ; .type saved_magic STT_OBJECT ; .size saved_magic, .-saved_magic

-- 
Regards/Gruss,
    Boris.

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