BTRFS_FEATURE_COMPAT_RO_SUPP 2948 fs/btrfs/disk-io.c 		~BTRFS_FEATURE_COMPAT_RO_SUPP;
BTRFS_FEATURE_COMPAT_RO_SUPP  651 fs/btrfs/sysfs.c 	[FEAT_COMPAT_RO] = BTRFS_FEATURE_COMPAT_RO_SUPP,