On 4/21/20 7:07 AM, Waiman Long wrote: > Systemtap 4.2 is unable to correctly interpret the "u32 (*missed_ppm)[2]" > argument of the iocost_ioc_vrate_adj trace entry defined in > include/trace/events/iocost.h leading to the following error: > > /tmp/stapAcz0G0/stap_c89c58b83cea1724e26395efa9ed4939_6321_aux_6.c:78:8: > error: expected ‘;’, ‘,’ or ‘)’ before ‘*’ token > , u32[]* __tracepoint_arg_missed_ppm > > That argument type is indeed rather complex and hard to read. Looking > at block/blk-iocost.c. It is just a 2-entry u32 array. By simplifying > the argument to a simple "u32 *missed_ppm" and adjusting the trace > entry accordingly, the compilation error was gone. Applied, thanks. -- Jens Axboe
