[patch, -rc5-mm1] lock validator: remove softirq.c WARN_ON

[Ingo Molnar <mingo@elte.hu>]

* Jiri Slaby <jirislaby@gmail.com> wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> Andrew Morton napsal(a):
> > ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.17-rc5/2.6.17-rc5-mm1/
> 
> BUG: warning at /l/latest/xxx/kernel/softirq.c:86/local_bh_disable()

ok, that WARN_ON is over-eager. Fix is below:

--------------
Subject: lock validator: remove softirq.c WARN_ON
From: Ingo Molnar <mingo@elte.hu>

there is nothing wrong with calling local_bh_disable() in irqs-off
section (as long as the local_bh_enable isnt done with irqs-off),
so remove this over-eager WARN_ON().

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
---
 kernel/softirq.c |    1 -
 1 file changed, 1 deletion(-)

Index: linux/kernel/softirq.c
===================================================================
--- linux.orig/kernel/softirq.c
+++ linux/kernel/softirq.c
@@ -83,7 +83,6 @@ static void __local_bh_disable(unsigned 
 
 void local_bh_disable(void)
 {
-	WARN_ON_ONCE(irqs_disabled());
 	__local_bh_disable((unsigned long)__builtin_return_address(0));
 }