Commit 386df1a57b63 for kernel

commit 386df1a57b631c456d14f857cb0c0c2e11c16bef
Author: Mikulas Patocka <mpatocka@redhat.com>
Date:   Fri Jul 10 18:37:15 2026 +0200

    dm-stats: fix dm_jiffies_to_msec64

    There were wrong calculations in dm_jiffies_to_msec64 that produced
    incorrect output when HZ was different from 1000. This commit fixes them.

    Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
    Assisted-by: Claude:claude-opus-4-6
    Fixes: fd2ed4d25270 ("dm: add statistics support")
    Cc: stable@vger.kernel.org

diff --git a/drivers/md/dm-stats.c b/drivers/md/dm-stats.c
index e06374a3329e..5df710061a11 100644
--- a/drivers/md/dm-stats.c
+++ b/drivers/md/dm-stats.c
@@ -840,10 +840,10 @@ static unsigned long long dm_jiffies_to_msec64(struct dm_stat *s, unsigned long
 		result = jiffies_to_msecs(j & 0x3fffff);
 	if (j >= 1 << 22) {
 		mult = jiffies_to_msecs(1 << 22);
-		result += (unsigned long long)mult * (unsigned long long)jiffies_to_msecs((j >> 22) & 0x3fffff);
+		result += (unsigned long long)mult * ((j >> 22) & 0x3fffff);
 	}
 	if (j >= 1ULL << 44)
-		result += (unsigned long long)mult * (unsigned long long)mult * (unsigned long long)jiffies_to_msecs(j >> 44);
+		result += (unsigned long long)mult * (unsigned long long)(1 << 22) * (j >> 44);

 	return result;
 }