| Date | Mon, 29 May 2006 18:33:21 -0700 | From | Andrew Morton <> | Subject | Re: [patch 05/61] lock validator: introduce WARN_ON_ONCE(cond) |
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On Mon, 29 May 2006 23:23:28 +0200 Ingo Molnar <mingo@elte.hu> wrote:
> add WARN_ON_ONCE(cond) to print once-per-bootup messages. > > Signed-off-by: Ingo Molnar <mingo@elte.hu> > Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> > --- > include/asm-generic/bug.h | 13 +++++++++++++ > 1 file changed, 13 insertions(+) > > Index: linux/include/asm-generic/bug.h > =================================================================== > --- linux.orig/include/asm-generic/bug.h > +++ linux/include/asm-generic/bug.h > @@ -44,4 +44,17 @@ > # define WARN_ON_SMP(x) do { } while (0) > #endif > > +#define WARN_ON_ONCE(condition) \ > +({ \ > + static int __warn_once = 1; \ > + int __ret = 0; \ > + \ > + if (unlikely(__warn_once && (condition))) { \ > + __warn_once = 0; \ > + WARN_ON(1); \ > + __ret = 1; \ > + } \ > + __ret; \ > +}) > + > #endif
I'll queue this for mainline inclusion. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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