Messages in this thread | | | From | KOSAKI Motohiro <> | Subject | Re: [PATCH 08/16] tracing: have event_trace_printk use static tracer | Date | Fri, 13 Mar 2009 12:09:50 +0900 (JST) |
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> +#define event_trace_printk(ip, fmt, args...) \ > +do { \ > + __trace_printk_check_format(fmt, ##args); \ > + tracing_record_cmdline(current); \ > + if (__builtin_constant_p(fmt)) { \ > + static const char *trace_printk_fmt \ > + __attribute__((section("__trace_printk_fmt"))) = \ > + __builtin_constant_p(fmt) ? fmt : NULL; \
Why __builtin_constant_p(fmt) evaluate twice?
> + \ > + __trace_bprintk(ip, trace_printk_fmt, ##args); \ > + } else \ > + __trace_printk(ip, fmt, ##args); \ > +} while (0)
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