From: SeungJu Cheon <suunj1331@gmail.com>
To: ray.huang@amd.com, linux@roeck-us.net
Cc: linux-hwmon@vger.kernel.org, linux-kernel@vger.kernel.org,
SeungJu Cheon <suunj1331@gmail.com>
Subject: [PATCH] hwmon:fam15h_power Use div64_u64() for 64-bit divisor
Date: Tue, 30 Dec 2025 21:09:59 +0900 [thread overview]
Message-ID: <20251230120959.199139-1-suunj1331@gmail.com> (raw)
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@gmail.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
next reply other threads:[~2025-12-30 12:11 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-12-30 12:09 SeungJu Cheon [this message]
2025-12-30 23:23 ` David Laight
2025-12-31 14:18 ` Guenter Roeck
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