unicode: pass a UNICODE_AGE() tripple to utf8_load

Don't bother with pointless string parsing when the caller can just pass
the version in the format that the core expects.  Also remove the
fallback to the latest version that none of the callers actually uses.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>

1 files changed, 5 insertions, 45 deletions

diff --git a/fs/unicode/utf8-core.c b/fs/unicode/utf8-core.c
index 86f42a078d99..dca2865c3bee 100644
--- a/fs/unicode/utf8-core.c
+++ b/fs/unicode/utf8-core.c
@@ -167,59 +167,19 @@ int utf8_normalize(const struct unicode_map *um, const struct qstr *str,
 	}
 	return -EINVAL;
 }
-
 EXPORT_SYMBOL(utf8_normalize);
 
-static int utf8_parse_version(const char *version, unsigned int *maj,
-			      unsigned int *min, unsigned int *rev)
+struct unicode_map *utf8_load(unsigned int version)
 {
-	substring_t args[3];
-	char version_string[12];
-	static const struct match_token token[] = {
-		{1, "%d.%d.%d"},
-		{0, NULL}
-	};
-
-	strncpy(version_string, version, sizeof(version_string));
-
-	if (match_token(version_string, token, args) != 1)
-		return -EINVAL;
-
-	if (match_int(&args[0], maj) || match_int(&args[1], min) ||
-	    match_int(&args[2], rev))
-		return -EINVAL;
+	struct unicode_map *um;
 
-	return 0;
-}
-
-struct unicode_map *utf8_load(const char *version)
-{
-	struct unicode_map *um = NULL;
-	int unicode_version;
-
-	if (version) {
-		unsigned int maj, min, rev;
-
-		if (utf8_parse_version(version, &maj, &min, &rev) < 0)
-			return ERR_PTR(-EINVAL);
-
-		if (!utf8version_is_supported(maj, min, rev))
-			return ERR_PTR(-EINVAL);
-
-		unicode_version = UNICODE_AGE(maj, min, rev);
-	} else {
-		unicode_version = utf8version_latest();
-		printk(KERN_WARNING"UTF-8 version not specified. "
-		       "Assuming latest supported version (%d.%d.%d).",
-		       (unicode_version >> 16) & 0xff,
-		       (unicode_version >> 8) & 0xff,
-		       (unicode_version & 0xff));
-	}
+	if (!utf8version_is_supported(version))
+		return ERR_PTR(-EINVAL);
 
 	um = kzalloc(sizeof(struct unicode_map), GFP_KERNEL);
 	if (!um)
 		return ERR_PTR(-ENOMEM);
-	um->version = unicode_version;
+	um->version = version;
 	return um;
 }
 EXPORT_SYMBOL(utf8_load);