From: Vadim Pasternak <vadimp@mellanox.com>
Date: Tue, 14 Jul 2020 12:01:53 +0000 (+0300)
Subject: lib/string_helpers: Introduce string_upper() and string_lower() helpers
X-Git-Tag: baikal/aarch64/sdk5.10~47
X-Git-Url: https://git.baikalelectronics.ru/sdk/?a=commitdiff_plain;h=3f1932749078d29fdee99a8796e3b2e8d597ea08;p=kernel.git

lib/string_helpers: Introduce string_upper() and string_lower() helpers

[ Upstream commit 100d9f0f963ebe32c8e144c493448da760c7320b ]

Provide the helpers for string conversions to upper and lower cases.

Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Stable-dep-of: 3c0f4f09c063 ("usb: gadget: u_ether: Fix host MAC address case")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/include/linux/string_helpers.h b/include/linux/string_helpers.h
index c289551322342..86f150c2a6b66 100644
--- a/include/linux/string_helpers.h
+++ b/include/linux/string_helpers.h
@@ -2,6 +2,7 @@
 #ifndef _LINUX_STRING_HELPERS_H_
 #define _LINUX_STRING_HELPERS_H_
 
+#include <linux/ctype.h>
 #include <linux/types.h>
 
 struct file;
@@ -75,6 +76,20 @@ static inline int string_escape_str_any_np(const char *src, char *dst,
 	return string_escape_str(src, dst, sz, ESCAPE_ANY_NP, only);
 }
 
+static inline void string_upper(char *dst, const char *src)
+{
+	do {
+		*dst++ = toupper(*src);
+	} while (*src++);
+}
+
+static inline void string_lower(char *dst, const char *src)
+{
+	do {
+		*dst++ = tolower(*src);
+	} while (*src++);
+}
+
 char *kstrdup_quotable(const char *src, gfp_t gfp);
 char *kstrdup_quotable_cmdline(struct task_struct *task, gfp_t gfp);
 char *kstrdup_quotable_file(struct file *file, gfp_t gfp);