linux-kernel - Re: [PATCH 3/4] x86: Unify local

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Date:	Sun, 16 Dec 2007 11:45:01 -0800
From:	Harvey Harrison <harvey.harrison@...il.com>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Ingo Molnar <mingo@...e.hu>, LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH 3/4] x86: Unify local_{32|64}.h

On Sun, 2007-12-16 at 10:18 -0800, H. Peter Anvin wrote:
> Harvey Harrison wrote:
> > Introduce macros to deal with X86_32 using longs and X86_64
> > using quads.  Small comment fixes to make files match.
> >  
> >  #define local_read(l)	atomic_long_read(&(l)->a)
> >  #define local_set(l,i)	atomic_long_set(&(l)->a, (i))
> > +/*
> > + * X86_32 uses longs
> > + * X86_64 uses quads
> > + */
> > +#ifdef CONFIG_X86_32
> > +# define ASM_INC incl
> > +# define ASM_DEC decl
> > +# define ASM_ADD addl
> > +# define ASM_SUB subl
> > +# define ASM_XADD xaddl
> > +#else
> > +# define ASM_INC incq
> > +# define ASM_DEC decq
> > +# define ASM_ADD addq
> > +# define ASM_SUB subq
> > +# define ASM_XADD xaddq
> > +#endif
> >  
> 
> Please put these in <asm/asm.h> using the _ASM_* namespace and include 
> the quotation marks.

Will revise.

> 
> >  #ifdef CONFIG_X86_32
> >  # include "local_32.h"
> > diff --git a/include/asm-x86/local_32.h b/include/asm-x86/local_32.h
> > index f3bc4d9..ff6d1d2 100644
> > --- a/include/asm-x86/local_32.h
> > +++ b/include/asm-x86/local_32.h
> > @@ -4,21 +4,21 @@
> >  static inline void local_inc(local_t *l)
> >  {
> >  	__asm__ __volatile__(
> > -		"incl %0"
> > +		"ASM_INC %0"
> >  		:"+m" (l->a.counter));
> 
> You're substituting a macro *inside* a string here.
> 

*ahem*, oops.  Will fix.

Harvey

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