linux-kernel - Re: [PATCH 6/6] fs: Introduce kern_mount

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Message-ID: <20081128093419.GM28946@ZenIV.linux.org.uk>
Date:	Fri, 28 Nov 2008 09:34:19 +0000
From:	Al Viro <viro@...IV.linux.org.uk>
To:	Eric Dumazet <dada1@...mosbay.com>
Cc:	Ingo Molnar <mingo@...e.hu>, David Miller <davem@...emloft.net>,
	"Rafael J. Wysocki" <rjw@...k.pl>, linux-kernel@...r.kernel.org,
	kernel-testers@...r.kernel.org, Mike Galbraith <efault@....de>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Linux Netdev List <netdev@...r.kernel.org>,
	Christoph Lameter <cl@...ux-foundation.org>,
	Christoph Hellwig <hch@...radead.org>, rth@...ddle.net,
	ink@...assic.park.msu.ru
Subject: Re: [PATCH 6/6] fs: Introduce kern_mount_special() to mount
	special vfs

On Fri, Nov 28, 2008 at 09:26:04AM +0000, Al Viro wrote:

gyah...  That would be

> static __inline__ int atomic_add_unless(atomic_t *v, int a, int u)
> {
> 	unsigned long temp, res;
> 	__asm__ __volatile__(
> 	"1:     ldl_l %0,%1\n"
> 	"       cmpne %0,%4,%2\n"
 	"       beq %2,3f\n"
 	"       addl %0,%3,%2\n"
> 	"       stl_c %2,%1\n"
> 	"       beq %2,2f\n"
> 	"3:\n"
>         ".subsection 2\n"
>         "2:     br 1b\n"
>         ".previous"
>         :"=&r" (temp), "=m" (v->counter), "=&r" (res)
>         :"Ir" (a), "Ir" (u), "m" (v->counter) : "memory");
> 	smp_mb();
> 	return res;
> }
> 
> static __inline__ int atomic64_add_unless(atomic64_t *v, long a, long u)
> {
> 	unsigned long temp, res;
> 	__asm__ __volatile__(
> 	"1:     ldq_l %0,%1\n"
> 	"       cmpne %0,%4,%2\n"
 	"       beq %2,3f\n"
 	"       addq %0,%3,%2\n"
> 	"       stq_c %2,%1\n"
> 	"       beq %2,2f\n"
> 	"3:\n"
>         ".subsection 2\n"
>         "2:     br 1b\n"
>         ".previous"
>         :"=&r" (temp), "=m" (v->counter), "=&r" (res)
>         :"Ir" (a), "Ir" (u), "m" (v->counter) : "memory");
> 	smp_mb();
> 	return res;
> }
> 
> Comments?
> --
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