linux-kernel - [PATCH] hwmon:fam15h_power Use div64

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Message-ID: <20251230120959.199139-1-suunj1331@gmail.com>
Date: Tue, 30 Dec 2025 21:09:59 +0900
From: SeungJu Cheon <suunj1331@...il.com>
To: ray.huang@....com,
	linux@...ck-us.net
Cc: linux-hwmon@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	SeungJu Cheon <suunj1331@...il.com>
Subject: [PATCH] hwmon:fam15h_power Use div64_u64() for 64-bit divisor

tdelta is u64, but do_div() truncates the divisor to 32 bits.
Use div64_u64() to handle the full 64-bit divisor correctly.

Signed-off-by: SeungJu Cheon <suunj1331@...il.com>
---
 drivers/hwmon/fam15h_power.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hwmon/fam15h_power.c b/drivers/hwmon/fam15h_power.c
index 8ecebea53651..5e3692606516 100644
--- a/drivers/hwmon/fam15h_power.c
+++ b/drivers/hwmon/fam15h_power.c
@@ -241,7 +241,7 @@ static ssize_t power1_average_show(struct device *dev,
 		}
 		tdelta = data->cpu_sw_pwr_ptsc[cu] - prev_ptsc[cu];
 		jdelta[cu] *= data->cpu_pwr_sample_ratio * 1000;
-		do_div(jdelta[cu], tdelta);
+		jdelta[cu] = div64_u64(jdelta[cu], tdelta);
 
 		/* the unit is microWatt */
 		avg_acc += jdelta[cu];
-- 
2.52.0