From: Caleb Sander Mateos <csander@purestorage.com>
Date: Fri, 12 Dec 2025 17:17:00 +0000 (-0700)
Subject: selftests: ublk: correct last_rw map type in seq_io.bt
X-Git-Tag: v6.19-rc2~22^2~16
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1fd4b8d7e3cf102bd01a295460d629e15152d2b3;p=thirdparty%2Flinux.git

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

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>
---

diff --git a/tools/testing/selftests/ublk/trace/seq_io.bt b/tools/testing/selftests/ublk/trace/seq_io.bt
index 272ac54c9d5fa..507a3ca05abfc 100644
--- a/tools/testing/selftests/ublk/trace/seq_io.bt
+++ b/tools/testing/selftests/ublk/trace/seq_io.bt
@@ -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
 {