linux-kernel - Re: [PATCH] objtool: Fix GCC 8 cold function processing without -freorder-functions

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Message-ID: <20180626164338.GH2458@hirez.programming.kicks-ass.net>
Date:   Tue, 26 Jun 2018 18:43:38 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Allan Xavier <allan.x.xavier@...cle.com>
Cc:     Josh Poimboeuf <jpoimboe@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] objtool: Fix GCC 8 cold function processing without
 -freorder-functions

On Tue, Jun 26, 2018 at 05:20:45PM +0100, Allan Xavier wrote:
> 0000000000000500 g     F .text  0000000000000034 nmi_panic
> 0000000000000528 l     F .text  000000000000000c nmi_panic.cold.7
> 
> This doesn't happen with -freorder-functions in the first example as the
> symbols don't overlap. 

Urgh and I don't suppose we can 'fix' the overlap in read_symbols() ?