exfat: update file system parameter handling

Al Viro recently reworked the way file system parameters are handled
Update super.c to work with it in linux-next 20200203.

Signed-off-by: Valdis Kletnieks <valdis.kletnieks@vt.edu>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/exfat/super.c

@@ -214,41 +214,35 @@ enum {
 	Opt_time_offset,
 };
 
-static const struct fs_parameter_spec exfat_param_specs[] = {
+static const struct constant_table exfat_param_enums[] = {
+	{ "continue",		EXFAT_ERRORS_CONT },
+	{ "panic",		EXFAT_ERRORS_PANIC },
+	{ "remount-ro",		EXFAT_ERRORS_RO },
+	{}
+};
+
+static const struct fs_parameter_spec exfat_parameters[] = {
 	fsparam_u32("uid",			Opt_uid),
 	fsparam_u32("gid",			Opt_gid),
 	fsparam_u32oct("umask",			Opt_umask),
 	fsparam_u32oct("dmask",			Opt_dmask),
 	fsparam_u32oct("fmask",			Opt_fmask),
 	fsparam_u32oct("allow_utime",		Opt_allow_utime),
 	fsparam_string("iocharset",		Opt_charset),
-	fsparam_enum("errors",			Opt_errors),
+	fsparam_enum("errors",			Opt_errors, exfat_param_enums),
 	fsparam_flag("discard",			Opt_discard),
 	fsparam_s32("time_offset",		Opt_time_offset),
 	{}
 };
 
-static const struct fs_parameter_enum exfat_param_enums[] = {
-	{ Opt_errors,	"continue",		EXFAT_ERRORS_CONT },
-	{ Opt_errors,	"panic",		EXFAT_ERRORS_PANIC },
-	{ Opt_errors,	"remount-ro",		EXFAT_ERRORS_RO },
-	{}
-};
-
-static const struct fs_parameter_description exfat_parameters = {
-	.name		= "exfat",
-	.specs		= exfat_param_specs,
-	.enums		= exfat_param_enums,
-};
-
 static int exfat_parse_param(struct fs_context *fc, struct fs_parameter *param)
 {
 	struct exfat_sb_info *sbi = fc->s_fs_info;
 	struct exfat_mount_options *opts = &sbi->options;
 	struct fs_parse_result result;
 	int opt;
 
-	opt = fs_parse(fc, &exfat_parameters, param, &result);
+	opt = fs_parse(fc, exfat_parameters, param, &result);
 	if (opt < 0)
 		return opt;
 
@@ -665,7 +659,7 @@ static struct file_system_type exfat_fs_type = {
 	.owner			= THIS_MODULE,
 	.name			= "exfat",
 	.init_fs_context	= exfat_init_fs_context,
-	.parameters		= &exfat_parameters,
+	.parameters		= exfat_parameters,
 	.kill_sb		= kill_block_super,
 	.fs_flags		= FS_REQUIRES_DEV,
 };