From: Clemens Koller <clemens.koller@anagramm.de>
To: LKML List <linux-kernel@vger.kernel.org>
Subject: What's this __dummy in asm-cris/bitops.h?
Date: Wed, 19 Dec 2007 20:56:17 +0100 [thread overview]
Message-ID: <47697761.1090702@anagramm.de> (raw)
Hello,
while looking for some assembly out of order / optimization stuff
for something else, I found some strange code in
.../linux/include/asm-cris/bitops.h:22
/*
* Some hacks to defeat gcc over-optimizations..
*/
struct __dummy { unsigned long a[100]; };
#define ADDR (*(struct __dummy *) addr)
#define CONST_ADDR (*(const struct __dummy *) addr)
CONST_ADDR is never used in the kernel.
Maybe some -cris people could have a look.
Thanks,
--
Clemens Koller
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next reply other threads:[~2007-12-19 19:56 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-12-19 19:56 Clemens Koller [this message]
2007-12-20 9:56 ` What's this __dummy in asm-cris/bitops.h? Jesper Nilsson
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