linux-kernel - Re: [PATCH 1/4] Blackfin: arch patch for 2.6.18

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Message-Id: <200609281304.31872.arnd@arndb.de>
Date:	Thu, 28 Sep 2006 13:04:30 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Bernd Schmidt <bernds_cb1@...nline.de>
Cc:	Robin Getz <rgetz@...ckfin.uclinux.org>,
	luke Yang <luke.adi@...il.com>, Andrew Morton <akpm@...l.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/4] Blackfin: arch patch for 2.6.18

On Thursday 28 September 2006 11:31, Bernd Schmidt wrote:
> > 
> > That completely avoids all the problems you might hit with macro expansion,
> > while still compiling to the same code.
> 
> The operand is an input, not an output. 

ok, my fault.

> We want to restore the proper  
> mask of enabled interrupts with the STI.  That mask is in the global 
> irq_flags variable (which probably ought to have a different name that 
> doesn't invite clashes).

Shouldn't you just use a constant expression here? A global variable
for it sounds rather strange, especially since the local_irq_disable()
calls are sometimes nested, not to mention the problems you'd hit on
SMP?

	Arnd <><
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