From: Keith Owens <kaos@ocs.com.au>
To: Linux Kernel list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH][2.6] IBM PowerPC Virtual Ethernet Driver
Date: Wed, 18 Feb 2004 15:19:36 +1100 [thread overview]
Message-ID: <7789.1077077976@kao2.melbourne.sgi.com> (raw)
In-Reply-To: Your message of "Wed, 18 Feb 2004 11:45:20 +1100." <1077065118.1082.83.camel@gaston>
On Wed, 18 Feb 2004 11:45:20 +1100,
Benjamin Herrenschmidt <benh@kernel.crashing.org> wrote:
>BITFIELDS ARE EVIL !!!
>The compiler is perfectly free, afaik, to re-order them
Not it is not. C standard (ISO/IEC 9899:1999 (E)), section 6.7.2.1.
10 ... If enough space remains, a bit-field that immediately follows
another bit-field in a structure shall be packed into adjacent bits
of the same unit. ...
13 Within a structure object, the non-bit-field members and the units
in which bit-fields reside have addresses that increase in the order
in which they are declared. ...
There is no scope for a compiler to reorder the members or the bit
fields of a structure.
next prev parent reply other threads:[~2004-02-18 4:23 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-02-17 22:48 [PATCH][2.6] IBM PowerPC Virtual Ethernet Driver Santiago Leon
2004-02-18 0:45 ` Benjamin Herrenschmidt
2004-02-18 4:01 ` Dave Jones
2004-02-18 4:23 ` viro
2004-02-18 4:46 ` Linus Torvalds
2004-02-18 5:03 ` Benjamin Herrenschmidt
2004-02-18 16:39 ` Linus Torvalds
2004-02-18 5:04 ` viro
2004-02-18 4:19 ` Keith Owens [this message]
2004-02-18 4:42 ` Andrew Morton
2004-02-18 4:48 ` Linus Torvalds
2004-02-20 23:26 ` Santiago Leon
2004-02-22 22:11 ` Pavel Machek
2004-02-26 5:52 ` Jeff Garzik
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