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selftests: ublk: correct last_rw map type in seq_io.bt

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The last_rw map is initialized with a value of 0 but later assigned the
value args.sector + args.nr_sector, which has type sector_t = u64.
bpftrace complains about the type mismatch between int64 and uint64:
trace/seq_io.bt:18:3-59: ERROR: Type mismatch for @last_rw: trying to assign value of type 'uint64' when map already contains a value of type 'int64'
        @last_rw[$dev, str($2)] = (args.sector + args.nr_sector);

Cast the initial value to uint64 so bpftrace will load the program.

Signed-off-by: Caleb Sander Mateos <csander@purestorage.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Caleb Sander Mateos 2025-12-12 10:17:00 -07:00 committed by Jens Axboe
parent 9637fc3bdd
commit 1fd4b8d7e3
1 changed files with 1 additions and 1 deletions
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2
tools/testing/selftests/ublk/trace/seq_io.bt
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@ -4,7 +4,7 @@
$3: strlen($2)
*/
BEGIN {
@last_rw[$1, str($2)] = 0;
@last_rw[$1, str($2)] = (uint64)0;
}
tracepoint:block:block_rq_complete
{