From: Andi Kleen <ak@muc.de>
To: Emmanuel Michon <emmanuel_michon@realmagic.fr>
Cc: linux-kernel@vger.kernel.org
Subject: Re: binary compatibity (mixing different gcc versions) in modules
Date: 18 Jun 2002 02:24:27 +0200 [thread overview]
Message-ID: <m3sn3ljux0.fsf@averell.firstfloor.org> (raw)
In-Reply-To: Emmanuel Michon's message of "Mon, 17 Jun 2002 14:40:07 +0200"
Emmanuel Michon <emmanuel_michon@realmagic.fr> writes:
> Hi,
>
> looking at nvidia proprietary driver, the makefile warns
> the user against insmod'ing a module compiled with a gcc
> version different from the one that was used to compile
> the kernel.
>
> This sounds strange to me, since I never encountered this
> problem.
Some earlier obsolete gcc versions had problems with empty types. This lead
to an #if based on the compiler version that added a dummy field
to spinlocks even for UP kernels. This made structure offsets of
structures with spinlocks change based on gcc version.
Should be long gone with recent compilers.
Still there are enough other variables to structure offsets depending
on the configuration.
-Andi
next prev parent reply other threads:[~2002-06-18 0:24 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-06-17 12:36 binary compatibity (mixing different gcc versions) in modules Emmanuel Michon
2002-06-17 13:11 ` Richard B. Johnson
2002-06-17 21:25 ` J Sloan
2002-06-18 0:24 ` Andi Kleen [this message]
2002-06-18 16:11 ` andrew may
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