Commit 78cac393 authored by John Garry's avatar John Garry Committed by Will Deacon
Browse files

drivers/perf: thunderx2_pmu: Change data in size tx2_uncore_event_update() 



A LSL of 32 requires > 32b value to hold the result. However in
tx2_uncore_event_update(), 1UL << 32 currently only works as unsigned
long is 64b on a 64b system.

If we want to compile test for a 32b system, we need unsigned long long,
whose min size is 64b.

Signed-off-by: default avatarJohn Garry <john.garry@huawei.com>
Link: https://lore.kernel.org/r/1633085326-156653-2-git-send-email-john.garry@huawei.com


Signed-off-by: default avatarWill Deacon <will@kernel.org>
parent 16cc4af2

drivers/perf/thunderx2_pmu.c

+1 −1
Original line number Diff line number Diff line
@@ -487,7 +487,7 @@ static void tx2_uncore_event_update(struct perf_event *event) 
		new = reg_readl(hwc->event_base);

		prev = local64_xchg(&hwc->prev_count, new);

		/* handles rollover of 32 bit counter */

		delta = (u32)(((1UL << 32) - prev) + new);

		delta = (u32)(((1ULL << 32) - prev) + new);

	}



	/* DMC event data_transfers granularity is 16 Bytes, convert it to 64 */