ocfs2: replace strnicmp with strncasecmp

The kernel used to contain two functions for length-delimited,
case-insensitive string comparison, strnicmp with correct semantics and
a slightly buggy strncasecmp.  The latter is the POSIX name, so strnicmp
was renamed to strncasecmp, and strnicmp made into a wrapper for the new
strncasecmp to avoid breaking existing users.

To allow the compat wrapper strnicmp to be removed at some point in the
future, and to avoid the extra indirection cost, do
s/strnicmp/strncasecmp/g.
Signed-off-by: NRasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

fs/ocfs2/cluster/heartbeat.c

@@ -2244,7 +2244,7 @@ ssize_t o2hb_heartbeat_group_mode_store(struct o2hb_heartbeat_group *group,
 		return -EINVAL;
 
 	for (i = 0; i < O2HB_HEARTBEAT_NUM_MODES; ++i) {
-		if (strnicmp(page, o2hb_heartbeat_mode_desc[i], len))
+		if (strncasecmp(page, o2hb_heartbeat_mode_desc[i], len))
 			continue;
 
 		ret = o2hb_global_heartbeat_mode_set(i);

fs/ocfs2/cluster/masklog.c

@@ -49,13 +49,13 @@ static ssize_t mlog_mask_show(u64 mask, char *buf)
 
 static ssize_t mlog_mask_store(u64 mask, const char *buf, size_t count)
 {
-	if (!strnicmp(buf, "allow", 5)) {
+	if (!strncasecmp(buf, "allow", 5)) {
 		__mlog_set_u64(mask, mlog_and_bits);
 		__mlog_clear_u64(mask, mlog_not_bits);
-	} else if (!strnicmp(buf, "deny", 4)) {
+	} else if (!strncasecmp(buf, "deny", 4)) {
 		__mlog_set_u64(mask, mlog_not_bits);
 		__mlog_clear_u64(mask, mlog_and_bits);
-	} else if (!strnicmp(buf, "off", 3)) {
+	} else if (!strncasecmp(buf, "off", 3)) {
 		__mlog_clear_u64(mask, mlog_not_bits);
 		__mlog_clear_u64(mask, mlog_and_bits);
 	} else