From: Andi Kleen <ak@muc.de>
To: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: linux-kernel@vger.kernel.org
Subject: Re: {put,get}_user() side effects
Date: Tue, 06 Apr 2004 13:32:50 +0200 [thread overview]
Message-ID: <m3fzbhfijh.fsf@averell.firstfloor.org> (raw)
In-Reply-To: <1HVGV-1Wl-21@gated-at.bofh.it> (Geert Uytterhoeven's message of "Tue, 06 Apr 2004 12:10:09 +0200")
Geert Uytterhoeven <geert@linux-m68k.org> writes:
> On most (all?) architectures {get,put}_user() has side effects:
>
> #define put_user(x,ptr) \
> __put_user_check((__typeof__(*(ptr)))(x),(ptr),sizeof(*(ptr)))
Neither typeof not sizeof are supposed to have side effects. If your
compiler generates them that's a compiler bug.
-Andi
next parent reply other threads:[~2004-04-06 11:41 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1HVGV-1Wl-21@gated-at.bofh.it>
2004-04-06 11:32 ` Andi Kleen [this message]
2004-04-06 11:46 ` {put,get}_user() side effects Geert Uytterhoeven
2004-04-06 20:53 ` Horst von Brand
2004-04-06 22:53 ` Andreas Schwab
2004-04-06 11:50 ` Xavier Bestel
2004-04-06 12:17 ` Wichert Akkerman
2004-04-06 14:28 ` Xavier Bestel
2004-04-06 15:30 ` Kevin P. Fleming
2004-04-06 15:47 ` Xavier Bestel
2004-04-06 10:03 Geert Uytterhoeven
2004-04-06 10:10 ` Russell King
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