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workqueue: avoid unguarded 64-bit division

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The printk() requires a division that is not allowed on 32-bit architectures:

x86_64-linux-ld: lib/test_workqueue.o: in function `test_workqueue_init':
test_workqueue.c:(.init.text+0x36f): undefined reference to `__udivdi3'

Use div_u64() to print the resulting elapsed microseconds.

Fixes: 24b2e73f97 ("workqueue: add test_workqueue benchmark module")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Arnd Bergmann
2026-04-02 22:59:03 +02:00
committed by Tejun Heo
parent 41e3ccca00
commit c6890f36fc
1 changed files with 1 additions and 1 deletions
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lib/test_workqueue.c
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@@ -242,7 +242,7 @@ static int __init run_bench(int n_threads, const char *scope, const char *label)
pr_info("test_workqueue: %-16s %llu items/sec\tp50=%llu\tp90=%llu\tp95=%llu ns\n",
label,
elapsed_us ? total_items * 1000000ULL / elapsed_us : 0,
elapsed_us ? div_u64(total_items * 1000000ULL, elapsed_us) : 0,
all_latencies[total_items * 50 / 100],
all_latencies[total_items * 90 / 100],
all_latencies[total_items * 95 / 100]);