s390/cmm: use string_upper() instead of open coded variant

Use string_upper() from string helper module instead of open coded variant.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20211001130201.72545-1-andriy.shevchenko@linux.intel.com
[hca@linux.ibm.com: removed hunk which converts extmem.c]
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

diff --git a/arch/s390/mm/cmm.c b/arch/s390/mm/cmm.c
index 1141c8d5c0d038a23ca3ecc2ced56e7b63a3c47a..2203164b39dae4043b4ba0a74d660f2885a034fc 100644 (file)
--- a/arch/s390/mm/cmm.c
+++ b/arch/s390/mm/cmm.c
@@ -14,8 +14,8 @@
 #include <linux/moduleparam.h>
 #include <linux/gfp.h>
 #include <linux/sched.h>
+#include <linux/string_helpers.h>
 #include <linux/sysctl.h>
-#include <linux/ctype.h>
 #include <linux/swap.h>
 #include <linux/kthread.h>
 #include <linux/oom.h>
@@ -394,13 +394,10 @@ static int __init cmm_init(void)
                goto out_sysctl;
 #ifdef CONFIG_CMM_IUCV
        /* convert sender to uppercase characters */
-       if (sender) {
-               int len = strlen(sender);
-               while (len--)
-                       sender[len] = toupper(sender[len]);
-       } else {
+       if (sender)
+               string_upper(sender, sender);
+       else
                sender = cmm_default_sender;
-       }
 
        rc = smsg_register_callback(SMSG_PREFIX, cmm_smsg_target);
        if (rc < 0)