From: Hartmut Schirmer <hartmut.schirmer@arcormail.de>
To: Richard Shih-Ping Chan <cshihpin@dso.org.sg>
Cc: gcc@gcc.gnu.org
Subject: Re: gcc/asm gurus: This linux kernel spinlock code breaks on 3.0.1
Date: Mon, 15 Oct 2001 09:37:00 -0000 [thread overview]
Message-ID: <01101518253700.00377@hallo> (raw)
In-Reply-To: <20011015085648.B13763@cshihpin.dso.org.sg>
On Mon, 15 Oct 2001, Richard Shih-Ping Chan wrote:
[..]
>#define spin_unlock_string \
> "xchgb %b0, %1" \
> :"=q" (oldval), "=m" (lock->lock) \
> :"0" (1) : "memory"
:"0" (oldval) : "memory"
>
>static inline void spin_unlock(spinlock_t *lock)
>{
> char oldval;
>#if SPINLOCK_DEBUG
> if (lock->magic != SPINLOCK_MAGIC)
> BUG();
> if (!spin_is_locked(lock))
> BUG();
>#endif
oldval = 1;
> __asm__ __volatile__(
> spin_unlock_string
> );
>}
may make it work.
Hartmut
next prev parent reply other threads:[~2001-10-15 9:37 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-10-14 17:54 Richard Shih-Ping Chan
2001-10-15 9:37 ` Hartmut Schirmer [this message]
2001-10-16 23:32 ` rth
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