From: David Howells <dhowells@redhat.com>
To: torvalds@osdl.org, akpm@osdl.org
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH] get rid of "+m" constraint in i386 rwsems
Date: Thu, 06 May 2004 12:58:53 +0100 [thread overview]
Message-ID: <4955.1083844733@redhat.com> (raw)
Hi Linus, Andrew,
Here's a patch to remove the usage of a "+m" constraint in the i386 optimised
rwsem implementation.
David
--- ./include/asm-i386/rwsem.h.orig 2004-05-06 12:54:38.000000000 +0100
+++ ./include/asm-i386/rwsem.h 2004-05-06 12:55:09.000000000 +0100
@@ -134,8 +134,8 @@ LOCK_PREFIX " cmpxchgl %2,%0\n\t"
" jnz 1b\n\t"
"2:\n\t"
"# ending __down_read_trylock\n\t"
- : "+m"(sem->count), "=&a"(result), "=&r"(tmp)
- : "i"(RWSEM_ACTIVE_READ_BIAS)
+ : "=m"(sem->count), "=&a"(result), "=&r"(tmp)
+ : "i"(RWSEM_ACTIVE_READ_BIAS), "m"(sem->count)
: "memory", "cc");
return result>=0 ? 1 : 0;
}
next reply other threads:[~2004-05-06 11:59 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-05-06 11:58 David Howells [this message]
2004-05-06 12:18 ` [PATCH] get rid of "+m" constraint in i386 rwsems Russell King
2004-05-06 12:58 ` David Howells
2004-05-06 13:24 ` Russell King
2004-05-06 19:23 ` Horst von Brand
2004-05-06 14:42 ` Linus Torvalds
2004-05-06 23:45 ` Richard Henderson
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