linux-kernel - Re: [PATCH v3] ia64: fix module loading for gcc-5.4

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Message-ID: <20170429191432.5ebe2129@sf>
Date:   Sat, 29 Apr 2017 19:14:32 +0100
From:   Sergei Trofimovich <slyfox@...too.org>
To:     Tony Luck <tony.luck@...el.com>
Cc:     linux-ia64@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] ia64: fix module loading for gcc-5.4

On Sat,  8 Apr 2017 20:53:18 +0100
Sergei Trofimovich <slyfox@...too.org> wrote:

> Starting from gcc-5.4+ gcc generates MLX
> instructions in more cases to refer local
> symbols:
>     https://gcc.gnu.org/PR60465
> 
> That caused ia64 module loader to choke
> on such instructions:
>     fuse: invalid slot number 1 for IMM64
> 
> Linux kernel used to handle only case where
> relocation pointed to slot=2 instruction in
> the bundle. That limitation was fixed in linux by
> commit 9c184a073bfd ("[IA64] Fix 2.6 kernel for the new ia64 assembler")
> See http://sources.redhat.com/bugzilla/show_bug.cgi?id=1433
> 
> This change lifts the slot=2 restriction from
> linux kernel module loader.
> 
> Tested on 'fuse' and 'btrfs' kernel modules.
> 
> Cc: Markus Elfring <elfring@...rs.sourceforge.net>
> Cc: H. J. Lu <hjl.tools@...il.com>
> Cc: Tony Luck <tony.luck@...el.com>
> Cc: Fenghua Yu <fenghua.yu@...el.com>
> Cc: linux-ia64@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org
> Cc: Andrew Morton <akpm@...ux-foundation.org>
> Bug: https://bugs.gentoo.org/601014
> Tested-by: Émeric MASCHINO <emeric.maschino@...il.com>
> Signed-off-by: Sergei Trofimovich <slyfox@...too.org>
> ---
> Change since v1: added 'Tested-by'
> Change since v2: checkpatched, fixed typos by found by Markus Elfring

Ping :)

-- 

  Sergei

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