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Date: Thu, 29 Jan 2009 14:38:07 +0100 From: Peter Zijlstra <peterz@...radead.org> To: Johannes Berg <johannes@...solutions.net> Cc: Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>, Linux Kernel list <linux-kernel@...r.kernel.org> Subject: Re: [PATCH v3] timer: implement lockdep deadlock detection On Wed, 2009-01-28 at 19:06 +0100, Johannes Berg wrote: > +/* > + * All the indirection here is required to build the > + * "<file>:<line>" string and the pointer to it. > + */ > +#define ___TIMER_INITIALIZER(_fn, _exp, _dat, _kn) \ > + ____TIMER_INITIALIZER(_fn, _exp, _dat, (_kn), &(_kn)) > +#define __TIMER_INITIALIZER(_fn, _exp, _dat, _f, _c, _l) \ > + ___TIMER_INITIALIZER(_fn, _exp, _dat, _f # _c # _l) > +#define _TIMER_INITIALIZER(_fn, _exp, _dat, _f, _l) \ > + __TIMER_INITIALIZER(_fn, _exp, _dat, _f, :, _l) > +#define TIMER_INITIALIZER(_function, _expires, _data) \ > + _TIMER_INITIALIZER(_function, _expires, _data, __FILE__, __LINE__) The regular way to write that would be: #define __STR(foo) #foo #define STR(foo) __STR(foo) __FILE__ ":" STR(__LINE__) I'm sure I saw that stringify thing somewhere in the kernel before, but can't find it. I recently added it to lockdep.c, maybe we should add it to kernel.h ? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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