From: Benjamin Herrenschmidt <benh@kernel•crashing.org>
To: "wilbur.chan" <wilbur512@gmail•com>
Cc: linuxppc-dev@ozlabs•org
Subject: Re: Problem when disabled interrupt in system call (ppc8270)
Date: Fri, 16 Oct 2009 15:43:39 +1100 [thread overview]
Message-ID: <1255668219.19032.12.camel@pasglop> (raw)
In-Reply-To: <e997b7420910151812m3de16f67hdb756bcd1f40ddc@mail.gmail.com>
On Fri, 2009-10-16 at 09:12 +0800, wilbur.chan wrote:
> static inline unsigned long local_irq_disable(void)
> {
> unsigned long flags, zero;
>
> __asm__ __volatile__("li %1,0; lbz %0,%2(13); stb %1,%2(13)"
> : "=r" (flags), "=&r" (zero)
> : "i" (offsetof(struct paca_struct, soft_enabled))
> : "memory");
>
> return flags;
> }
This is not the variant of local_irq_disable() used on that machine :-)
The above is the 64-bit version.
Ben.
next prev parent reply other threads:[~2009-10-16 4:43 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-16 1:12 Problem when disabled interrupt in system call (ppc8270) wilbur.chan
2009-10-16 4:43 ` Benjamin Herrenschmidt [this message]
2009-10-16 5:14 ` wilbur.chan
2009-10-16 7:25 ` Gabriel Paubert
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