From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Tue, 23 Jul 2019 20:41:55 +0000 (+0300)
Subject: md: Convert to use int_pow()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=cf89160793c439dca00e2563d0b7f153c274027b;p=linux.git

md: Convert to use int_pow()

Instead of linear approach to calculate power of 10, use generic int_pow()
which does it better.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
---

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 24638ccedce42..3f1252440ad08 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -3664,11 +3664,7 @@ int strict_strtoul_scaled(const char *cp, unsigned long *res, int scale)
 		return -EINVAL;
 	if (decimals < 0)
 		decimals = 0;
-	while (decimals < scale) {
-		result *= 10;
-		decimals ++;
-	}
-	*res = result;
+	*res = result * int_pow(10, scale - decimals);
 	return 0;
 }