ext4: remove the I_VERSION mount flag and use the super_block flag instead

There's no point to have two bits that are set in parallel; so use the
MS_I_VERSION flag that is needed by the VFS anyway, and that way we
free up a bit in sbi->s_mount_opts.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>


diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 7dbad76..6b27bc6 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1125,7 +1125,7 @@
 		seq_puts(seq, ",journal_async_commit");
 	else if (test_opt(sb, JOURNAL_CHECKSUM))
 		seq_puts(seq, ",journal_checksum");
-	if (test_opt(sb, I_VERSION))
+	if (sb->s_flags & MS_I_VERSION)
 		seq_puts(seq, ",i_version");
 	if (!test_opt(sb, DELALLOC) &&
 	    !(def_mount_opts & EXT4_DEFM_NODELALLOC))
@@ -1793,7 +1793,6 @@
 				 "Ignoring deprecated bh option");
 			break;
 		case Opt_i_version:
-			set_opt(sb, I_VERSION);
 			sb->s_flags |= MS_I_VERSION;
 			break;
 		case Opt_nodelalloc: