From 8e587a5f13ce676d7763ffa920148fe31bc3bfae Mon Sep 17 00:00:00 2001
From: Emmanuel Vadot <manu@FreeBSD.org>
Date: Tue, 22 Mar 2022 10:22:42 +0100
Subject: [PATCH] linuxkpi: Add kstrtouint_from_user

Like kstrtoint_from_user but for uint.
Needed by drm v5.10

MFC after:	1 month
Reviewed by:	hselasky
Sponsored by:	Beckhoff Automation GmbH & Co. KG
Differential Revision:	https://reviews.freebsd.org/D34642
---
 sys/compat/linuxkpi/common/include/linux/kernel.h | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/sys/compat/linuxkpi/common/include/linux/kernel.h b/sys/compat/linuxkpi/common/include/linux/kernel.h
index d6916812f02..8fb92dd2f93 100644
--- a/sys/compat/linuxkpi/common/include/linux/kernel.h
+++ b/sys/compat/linuxkpi/common/include/linux/kernel.h
@@ -524,6 +524,21 @@ kstrtoint_from_user(const char __user *s, size_t count, unsigned int base,
 	return (kstrtoint(buf, base, p));
 }
 
+static inline int
+kstrtouint_from_user(const char __user *s, size_t count, unsigned int base,
+    int *p)
+{
+	char buf[36] = {};
+
+	if (count > (sizeof(buf) - 1))
+		count = (sizeof(buf) - 1);
+
+	if (copy_from_user(buf, s, count))
+		return (-EFAULT);
+
+	return (kstrtouint(buf, base, p));
+}
+
 static inline int
 kstrtou8_from_user(const char __user *s, size_t count, unsigned int base,
     u8 *p)